{"response":{"docs":[{"system_create_dtsi":"2017-10-27T02:32:41Z","system_modified_dtsi":"2018-08-01T18:37:36Z","has_model_ssim":["Article"],"id":"bc386t45v","accessControl_ssim":["99a69ef6-d73a-429a-983f-e2a32b43ad73"],"hasRelatedMediaFragment_ssim":["bc386t464"],"hasRelatedImage_ssim":["bc386t464"],"depositor_ssim":["cohenky@ucmail.uc.edu"],"depositor_tesim":["cohenky@ucmail.uc.edu"],"title_tesim":["Feedback Control of a Cylinder Wake Low-Dimensional Model"],"date_uploaded_dtsi":"2017-02-08T00:00:00Z","date_modified_dtsi":"2017-04-05T00:00:00Z","isPartOf_ssim":["admin_set/default"],"proxy_depositor_ssim":["dungavjk@mail.uc.edu"],"doi_tesim":["10.2514/2.2087"],"journal_title_tesim":["AIAA Journal"],"college_tesim":["Engineering and Applied Science"],"department_tesim":["Aerospace Engineering and Engineering Mechanics"],"note_tesim":["This work was part of a pilot \"mediated-deposit model\" where library staff found potential works, later submitted for faculty review"],"creator_tesim":["Cohen, Kelly","Siegel, Stefan","McLaughlin, Thomas","Gillies, Eric"],"language_tesim":["English"],"description_tesim":["Not available"],"license_tesim":["http://rightsstatements.org/vocab/InC/1.0/"],"date_created_tesim":["2003-03"],"source_tesim":["AIAA Journal"],"thumbnail_path_ss":"/downloads/bc386t464?file=thumbnail","suppressed_bsi":false,"actionable_workflow_roles_ssim":["admin_set/default-default-depositing"],"workflow_state_name_ssim":["deposited"],"member_ids_ssim":["bc386t464"],"file_set_ids_ssim":["bc386t464"],"visibility_ssi":"open","admin_set_tesim":["Default Admin Set"],"sort_title_ssi":"FEEDBACK CONTROL OF A CYLINDER WAKE LOWDIMENSIONAL MODEL","human_readable_type_tesim":["Article"],"read_access_group_ssim":["public"],"read_access_person_ssim":["konecnmc@ucmail.uc.edu"],"edit_access_person_ssim":["cohenky@ucmail.uc.edu"],"nesting_collection__pathnames_ssim":["bc386t45v"],"nesting_collection__deepest_nested_depth_isi":1,"_version_":1697093967757180928,"timestamp":"2021-04-15T08:22:09.578Z","score":0.00049999997},{"system_create_dtsi":"2017-10-27T02:32:37Z","system_modified_dtsi":"2018-08-01T18:37:50Z","has_model_ssim":["Article"],"id":"bc386t439","accessControl_ssim":["5d01288d-4f79-48fa-b678-6a6483760b47"],"hasRelatedMediaFragment_ssim":["bc386t44k"],"hasRelatedImage_ssim":["bc386t44k"],"depositor_ssim":["cohenky@ucmail.uc.edu"],"depositor_tesim":["cohenky@ucmail.uc.edu"],"title_tesim":["Closed-Loop Vectoring Control of a Turbulent Jet Using Periodic Excitation"],"date_uploaded_dtsi":"2017-02-08T00:00:00Z","date_modified_dtsi":"2017-04-05T00:00:00Z","isPartOf_ssim":["admin_set/default"],"proxy_depositor_ssim":["dungavjk@mail.uc.edu"],"doi_tesim":["10.2514/2.6153"],"journal_title_tesim":["Journal Of Propulsion And Power"],"college_tesim":["Engineering and Applied Science"],"department_tesim":["Aerospace Engineering and Engineering Mechanics"],"note_tesim":["This work was part of a pilot \"mediated-deposit model\" where library staff found potential works, later submitted for faculty review"],"creator_tesim":["Cohen, Kelly","Rapoport, D.","Seifer, A.","Fono, I."],"language_tesim":["English"],"description_tesim":["Closed-loop control strategies were studied experimentally at low Reynolds and incompressible Mach numbers using periodic excitation to vector a turbulent jet. Vectoring was achieved by attaching a short, wide-angle diffuser at the jet exit and introducing periodic excitation from a slot covering one quadrant of the circumference of the round turbulent jet. Closed-loop control methods were applied to transition quickly and smoothly between different jet de ection angles. The frequency response of the zero-mass- ux piezoelectric actuatorwas  at to about 0.5 kHz, but the jet responds up to 30–50 Hz only. This is still an order of magnitude faster than conventional thrust vectoring mechanism. System identiŽ cation procedures were applied to approximate the system’s transfer function. A linear controller was designed that enabled fast and smooth transitions between stationary de ection angles and maintained desired jet vectoring angles under varying system conditions. The linear controller was tested over the entire range of available de ection angles, and its performance is evaluated and discussed."],"license_tesim":["http://rightsstatements.org/vocab/InC/1.0/"],"date_created_tesim":["2003-08"],"source_tesim":["Journal Of Propulsion And Power"],"thumbnail_path_ss":"/downloads/bc386t44k?file=thumbnail","suppressed_bsi":false,"actionable_workflow_roles_ssim":["admin_set/default-default-depositing"],"workflow_state_name_ssim":["deposited"],"member_ids_ssim":["bc386t44k"],"file_set_ids_ssim":["bc386t44k"],"visibility_ssi":"open","admin_set_tesim":["Default Admin Set"],"sort_title_ssi":"CLOSEDLOOP VECTORING CONTROL OF A TURBULENT JET USING PERIODIC EXCITATION","human_readable_type_tesim":["Article"],"read_access_group_ssim":["public"],"read_access_person_ssim":["konecnmc@ucmail.uc.edu"],"edit_access_person_ssim":["cohenky@ucmail.uc.edu"],"nesting_collection__pathnames_ssim":["bc386t439"],"nesting_collection__deepest_nested_depth_isi":1,"_version_":1697087544586403840,"timestamp":"2021-04-15T06:40:03.965Z","score":0.00049999997},{"system_create_dtsi":"2017-10-27T02:32:33Z","system_modified_dtsi":"2018-08-01T18:37:55Z","has_model_ssim":["Article"],"id":"bc386t41r","accessControl_ssim":["e26c4443-8a68-47ed-b23c-2e036a11a4b5"],"hasRelatedMediaFragment_ssim":["bc386t421"],"hasRelatedImage_ssim":["bc386t421"],"depositor_ssim":["cohenky@ucmail.uc.edu"],"depositor_tesim":["cohenky@ucmail.uc.edu"],"title_tesim":["Vibration Control Using Fuzzy-Logic-Based Active Damping"],"date_uploaded_dtsi":"2017-02-08T00:00:00Z","date_modified_dtsi":"2017-04-05T00:00:00Z","isPartOf_ssim":["admin_set/default"],"proxy_depositor_ssim":["dungavjk@mail.uc.edu"],"doi_tesim":["10.2514/2.3105"],"journal_title_tesim":["Journal Of Aircraft"],"college_tesim":["Engineering and Applied Science"],"department_tesim":["Aerospace Engineering and Engineering Mechanics"],"note_tesim":["This work was part of a pilot \"mediated-deposit model\" where library staff found potential works, later submitted for faculty review"],"creator_tesim":["Weller, Tanchum","Cohen, Kelly","Ben-Asher, Joseph Z."],"language_tesim":["English"],"description_tesim":["In this study a general approach is introduced for the design of a robust control law for suppression of structure borne vibration. This control law is based on a passive design in the form of dynamic vibration absorbers. Passive absorbers minimize vibration at a speciŽ c frequency, but their performance is improved by introducing adaptive tuning of the absorber. An adaptive dynamic vibration absorber is tuned to the forcing frequency, using classical methods. The tuning ratio is time varying and adapts itself to variations in the forcing frequency. However, the uniqueness of the approach in this study is that the damping parameter of the absorber is continuously varied by means of a fuzzy-logic control algorithm to provide a lower sound pressure level. The inputs of the fuzzy control law are the displacement and velocity of the main structure. The effectiveness of the control algorithm for active vibration control is demonstrated using MATLAB® simulations of a single-degree-of-freedom plant. This methodology provides superior performance in the presence of signiŽ cant mistuning compared to a more conventional approach."],"license_tesim":["http://rightsstatements.org/vocab/InC/1.0/"],"date_created_tesim":["2003-04"],"source_tesim":["Journal Of Aircraft"],"thumbnail_path_ss":"/downloads/bc386t421?file=thumbnail","suppressed_bsi":false,"actionable_workflow_roles_ssim":["admin_set/default-default-depositing"],"workflow_state_name_ssim":["deposited"],"member_ids_ssim":["bc386t421"],"file_set_ids_ssim":["bc386t421"],"visibility_ssi":"open","admin_set_tesim":["Default Admin Set"],"sort_title_ssi":"VIBRATION CONTROL USING FUZZYLOGICBASED ACTIVE DAMPING","human_readable_type_tesim":["Article"],"read_access_group_ssim":["public"],"read_access_person_ssim":["konecnmc@ucmail.uc.edu"],"edit_access_person_ssim":["cohenky@ucmail.uc.edu"],"nesting_collection__pathnames_ssim":["bc386t41r"],"nesting_collection__deepest_nested_depth_isi":1,"_version_":1697083752103018496,"timestamp":"2021-04-15T05:39:47.171Z","score":0.00049999997},{"system_create_dtsi":"2017-10-27T02:32:28Z","system_modified_dtsi":"2018-08-01T18:37:28Z","has_model_ssim":["Article"],"id":"bc386t39q","accessControl_ssim":["759d2c31-9d4e-4f48-9ca4-bcabee9393f7"],"hasRelatedMediaFragment_ssim":["bc386t40g"],"hasRelatedImage_ssim":["bc386t40g"],"depositor_ssim":["cohenky@ucmail.uc.edu"],"depositor_tesim":["cohenky@ucmail.uc.edu"],"title_tesim":["Flutter Supression Using Linear Optimal and Fuzzy Logic Techniques"],"date_uploaded_dtsi":"2017-02-08T00:00:00Z","date_modified_dtsi":"2017-04-05T00:00:00Z","isPartOf_ssim":["admin_set/default"],"proxy_depositor_ssim":["dungavjk@mail.uc.edu"],"doi_tesim":["10.2514/2.5030"],"journal_title_tesim":["Journal of Guidance, Control, and Dynamics"],"college_tesim":["Engineering and Applied Science"],"department_tesim":["Aerospace Engineering and Engineering Mechanics"],"note_tesim":["This work was part of a pilot \"mediated-deposit model\" where library staff found potential works, later submitted for faculty review"],"creator_tesim":["Weller, Tanchum","Moulin, Boris","Cohen, Kelly","Ben-Asher, Joseph Z.","Adin, Zvi"],"language_tesim":["English"],"description_tesim":["Not available"],"license_tesim":["http://rightsstatements.org/vocab/InC/1.0/"],"date_created_tesim":["2002-08"],"source_tesim":["Journal of Guidance, Control, and Dynamics"],"thumbnail_path_ss":"/downloads/bc386t40g?file=thumbnail","suppressed_bsi":false,"actionable_workflow_roles_ssim":["admin_set/default-default-depositing"],"workflow_state_name_ssim":["deposited"],"member_ids_ssim":["bc386t40g"],"file_set_ids_ssim":["bc386t40g"],"visibility_ssi":"open","admin_set_tesim":["Default Admin Set"],"sort_title_ssi":"FLUTTER SUPRESSION USING LINEAR OPTIMAL AND FUZZY LOGIC TECHNIQUES","human_readable_type_tesim":["Article"],"read_access_group_ssim":["public"],"read_access_person_ssim":["konecnmc@ucmail.uc.edu"],"edit_access_person_ssim":["cohenky@ucmail.uc.edu"],"nesting_collection__pathnames_ssim":["bc386t39q"],"nesting_collection__deepest_nested_depth_isi":1,"_version_":1697089955284647936,"timestamp":"2021-04-15T07:18:22.986Z","score":0.00049999997},{"system_create_dtsi":"2017-10-27T02:32:24Z","system_modified_dtsi":"2018-08-01T18:37:30Z","has_model_ssim":["Article"],"id":"bc386t375","accessControl_ssim":["787a6111-36a8-4a41-bfe8-701d00c7d3ac"],"hasRelatedMediaFragment_ssim":["bc386t38f"],"hasRelatedImage_ssim":["bc386t38f"],"depositor_ssim":["cohenky@ucmail.uc.edu"],"depositor_tesim":["cohenky@ucmail.uc.edu"],"title_tesim":["Experimental Studies on Adaptive Fuzzy Control of a Smart Structure"],"date_uploaded_dtsi":"2017-02-08T00:00:00Z","date_modified_dtsi":"2017-04-05T00:00:00Z","isPartOf_ssim":["admin_set/default"],"proxy_depositor_ssim":["dungavjk@mail.uc.edu"],"doi_tesim":["10.1177/107754602029585"],"journal_title_tesim":["Journal of Vibration and Control"],"college_tesim":["Engineering and Applied Science"],"department_tesim":["Aerospace Engineering and Engineering Mechanics"],"note_tesim":["This work was part of a pilot \"mediated-deposit model\" where library staff found potential works, later submitted for faculty review"],"creator_tesim":["Weller, Tanchum","Cohen, Kelly","Ben-Asher, Joseph Z.","Yaffe, Ronith"],"language_tesim":["English"],"description_tesim":["The present investigation deals with the application of an Adaptive Fuzzy Control Algorithm for active vibration control of an experimental flexible beam. The two-dimensional model of the experimental cantilever beam, given by an orthogonal tetrahedral space truss, represents a slender cantilever aluminum (7075-T6) beam of rectangular cross-section (1145 × 60 × 1.95 mm3). A variety of transient disturbances are introduced to excite the first four modes of the beam. The resulting transverse displacements are observed by a single sheet (50 × 50 mm2) of piezoceramic material placed at the clamped end of the beam. Active control of the beam is provided by one, two or three identical sheets of piezoceramic material collocated with the sensor. The control moments applied by the piezoceramic actuator are made to emulate the behavior of a discrete dynamic vibration absorber. The virtual absorber is tuned to the fundamental frequency using classical methods and the tuning ratios are time-invariant. However, the uniqueness of this approach is that the damping parameters of the emulated absorber are continuously varied by means of a fuzzy logic control algorithm to provide near minimum-time suppression of vibration. It is demonstrated that application of this methodology allows for its real-time implementation and provides relatively quick settling times in the closed-loop."],"license_tesim":["http://rightsstatements.org/vocab/InC/1.0/"],"date_created_tesim":["2002-08"],"source_tesim":["Journal of Vibration and Control"],"thumbnail_path_ss":"/downloads/bc386t38f?file=thumbnail","suppressed_bsi":false,"actionable_workflow_roles_ssim":["admin_set/default-default-depositing"],"workflow_state_name_ssim":["deposited"],"member_ids_ssim":["bc386t38f"],"file_set_ids_ssim":["bc386t38f"],"visibility_ssi":"open","admin_set_tesim":["Default Admin Set"],"sort_title_ssi":"EXPERIMENTAL STUDIES ON ADAPTIVE FUZZY CONTROL OF A SMART STRUCTURE","human_readable_type_tesim":["Article"],"read_access_group_ssim":["public"],"read_access_person_ssim":["konecnmc@ucmail.uc.edu"],"edit_access_person_ssim":["cohenky@ucmail.uc.edu"],"nesting_collection__pathnames_ssim":["bc386t375"],"nesting_collection__deepest_nested_depth_isi":1,"_version_":1697097969368563712,"timestamp":"2021-04-15T09:25:45.812Z","score":0.00049999997},{"system_create_dtsi":"2017-10-27T02:32:20Z","system_modified_dtsi":"2018-08-01T18:37:30Z","has_model_ssim":["Article"],"id":"bc386t35m","accessControl_ssim":["e7fe8a09-52f7-4717-b9f2-75b55b7884ec"],"hasRelatedMediaFragment_ssim":["bc386t36w"],"hasRelatedImage_ssim":["bc386t36w"],"depositor_ssim":["cohenky@ucmail.uc.edu"],"depositor_tesim":["cohenky@ucmail.uc.edu"],"title_tesim":["Active control of flexible structures using a fuzzy logic algorithm"],"date_uploaded_dtsi":"2017-02-08T00:00:00Z","date_modified_dtsi":"2017-04-05T00:00:00Z","isPartOf_ssim":["admin_set/default"],"proxy_depositor_ssim":["dungavjk@mail.uc.edu"],"doi_tesim":["10.1088/0964-1726/11/4/309"],"journal_title_tesim":["Smart Materials and Structures"],"college_tesim":["Engineering and Applied Science"],"department_tesim":["Aerospace Engineering and Engineering Mechanics"],"note_tesim":["This work was part of a pilot \"mediated-deposit model\" where library staff found potential works, later submitted for faculty review"],"creator_tesim":["Weller, Tanchum","Cohen, Kelly","Ben-Asher, Joseph Z."],"language_tesim":["English"],"description_tesim":["This study deals with the development and application of an active control law for the vibration suppression of beam-like flexible structures experiencing transient disturbances. Collocated pairs of sensors/actuators provide active control of the structure. A design methodology for the closed-loop control algorithm based on fuzzy logic is proposed. First, the behavior of the open-loop system is observed. Then, the number and locations of collocated actuator/sensor pairs are selected. The proposed control law, which is based on the principles of passivity, commands the actuator to emulate the behavior of a dynamic vibration absorber. The absorber is tuned to a targeted frequency, whereas the damping coefficient of the dashpot is varied in a closed loop using a fuzzy logic based algorithm. This approach not only ensures inherent stability associated with passive absorbers, but also circumvents the phenomenon of modal spillover. The developed controller is applied to the AFWAL/FIB 10 bar truss. Simulated results using MATLAB© show that the closed-loop system exhibits fairly quick settling times and desirable performance, as well as robustness characteristics. To demonstrate the robustness of the control system to changes in the temporal dynamics of the flexible structure, the transient response to a considerably perturbed plant is simulated. The modal frequencies of the 10 bar truss were raised as well as lowered substantially, thereby significantly perturbing the natural frequencies of vibration. For these cases, too, the developed control law provides adequate settling times and rates of vibrational energy dissipation."],"license_tesim":["http://rightsstatements.org/vocab/InC/1.0/"],"date_created_tesim":["2002-06"],"source_tesim":["Smart Materials and Structures"],"thumbnail_path_ss":"/downloads/bc386t36w?file=thumbnail","suppressed_bsi":false,"actionable_workflow_roles_ssim":["admin_set/default-default-depositing"],"workflow_state_name_ssim":["deposited"],"member_ids_ssim":["bc386t36w"],"file_set_ids_ssim":["bc386t36w"],"visibility_ssi":"open","admin_set_tesim":["Default Admin Set"],"sort_title_ssi":"ACTIVE CONTROL OF FLEXIBLE STRUCTURES USING A FUZZY LOGIC ALGORITHM","human_readable_type_tesim":["Article"],"read_access_group_ssim":["public"],"read_access_person_ssim":["konecnmc@ucmail.uc.edu"],"edit_access_person_ssim":["cohenky@ucmail.uc.edu"],"nesting_collection__pathnames_ssim":["bc386t35m"],"nesting_collection__deepest_nested_depth_isi":1,"_version_":1697095692559843328,"timestamp":"2021-04-15T08:49:34.478Z","score":0.00049999997},{"system_create_dtsi":"2017-10-27T02:32:15Z","system_modified_dtsi":"2018-08-01T18:37:55Z","has_model_ssim":["Article"],"id":"bc386t332","accessControl_ssim":["01d921be-5b19-47dd-bdb4-122031633251"],"hasRelatedMediaFragment_ssim":["bc386t34b"],"hasRelatedImage_ssim":["bc386t34b"],"depositor_ssim":["cohenky@ucmail.uc.edu"],"depositor_tesim":["cohenky@ucmail.uc.edu"],"title_tesim":["Control of Linear Second-Order Systems by Fuzzy Logic-Based Algorithm"],"date_uploaded_dtsi":"2017-02-08T00:00:00Z","date_modified_dtsi":"2017-04-05T00:00:00Z","isPartOf_ssim":["admin_set/default"],"proxy_depositor_ssim":["dungavjk@mail.uc.edu"],"doi_tesim":["10.2514/2.4738"],"journal_title_tesim":["Journal Of Guidance, Control, And Dynamics"],"college_tesim":["Engineering and Applied Science"],"department_tesim":["Aerospace Engineering and Engineering Mechanics"],"note_tesim":["This work was part of a pilot \"mediated-deposit model\" where library staff found potential works, later submitted for faculty review"],"creator_tesim":["Weller, Tanchum","Cohen, Kelly","Ben-Asher, Joseph Z."],"language_tesim":["English"],"description_tesim":["The control of  exible structures employing the passivity approach has been extended to systems having noncollocated input/output pairs by introducing an observer that incorporates the nominal dynamical model of the plant. The passive observer-based control is applied to the American Control Conference benchmark problem, whereby, the control force emulates a dynamic vibration absorber attached to a virtual wall with passive control elements (spring, mass, and dashpot). The springs and mass elements of the controller are constant, whereas the damping coefŽ cients are selected as time dependent in an attempt to choose continuously the most appropriate amount of damping in compliance with the design goals. A novel approach is introduced, whereby the passive observer-based control law is modiŽ ed by varying the damping coefŽ cient of the virtual dashpot by means of an adaptive fuzzy logic algorithm. This modiŽ ed system exhibits quick settling times and desirable performance characteristics. Results from the statistical robustness analysis for the developed controller are compared to 10 other (linear) solutionsof the benchmarkproblem. The comparisonis based onrobust stability, robust performance (settling time), and control effort. The results obtained by the adaptive fuzzy logic algorithm are superior to those obtained by all other methods, and, consequently, further application of the fuzzy algorithm is advocated."],"license_tesim":["http://rightsstatements.org/vocab/InC/1.0/"],"date_created_tesim":["2001-06"],"source_tesim":["Journal Of Guidance, Control, And Dynamics"],"thumbnail_path_ss":"/downloads/bc386t34b?file=thumbnail","suppressed_bsi":false,"actionable_workflow_roles_ssim":["admin_set/default-default-depositing"],"workflow_state_name_ssim":["deposited"],"member_ids_ssim":["bc386t34b"],"file_set_ids_ssim":["bc386t34b"],"visibility_ssi":"open","admin_set_tesim":["Default Admin Set"],"sort_title_ssi":"CONTROL OF LINEAR SECONDORDER SYSTEMS BY FUZZY LOGICBASED ALGORITHM","human_readable_type_tesim":["Article"],"read_access_group_ssim":["public"],"read_access_person_ssim":["konecnmc@ucmail.uc.edu"],"edit_access_person_ssim":["cohenky@ucmail.uc.edu"],"nesting_collection__pathnames_ssim":["bc386t332"],"nesting_collection__deepest_nested_depth_isi":1,"_version_":1697122201502744576,"timestamp":"2021-04-15T15:50:55.376Z","score":0.00049999997},{"system_create_dtsi":"2017-10-27T02:32:11Z","system_modified_dtsi":"2018-08-01T18:37:54Z","has_model_ssim":["Article"],"id":"bc386t31h","accessControl_ssim":["d713d6bc-d6cc-46c5-90e6-f0310b2e821c"],"hasRelatedMediaFragment_ssim":["bc386t32s"],"hasRelatedImage_ssim":["bc386t32s"],"depositor_ssim":["cohenky@ucmail.uc.edu"],"depositor_tesim":["cohenky@ucmail.uc.edu"],"title_tesim":["Model-Independent Vibration Control of Flexible Beam-Like Structures Using a Fuzzy Based Adaptation Strategy"],"date_uploaded_dtsi":"2017-02-08T00:00:00Z","date_modified_dtsi":"2017-04-05T00:00:00Z","isPartOf_ssim":["admin_set/default"],"proxy_depositor_ssim":["dungavjk@mail.uc.edu"],"doi_tesim":["10.1177/1045389X9700800304"],"journal_title_tesim":["Journal of Intelligent Material Systems and Structures"],"college_tesim":["Engineering and Applied Science"],"department_tesim":["Aerospace Engineering and Engineering Mechanics"],"note_tesim":["This work was part of a pilot \"mediated-deposit model\" where library staff found potential works, later submitted for faculty review"],"creator_tesim":["Abramovich, Haim","Weller, T.","Cohen, Kelly","Levitas, Joseph"],"language_tesim":["English"],"description_tesim":["The present study deals with an AFCA (Adaptive Fuzzy Control Algorithm) for an Euler-Bernoulli approximation of a two-dimensional version of a cantilever beam-like orthogonal tetrahedral space truss. Transient disturbances, modeled as a unit impulse, excite all the modes of the beam. The resulting transverse displacement at the free end of the beam and its corresponding rate are observed by sensors placed there, and active control of the beam is provided by a collocated force actuator.\n\nA design methodology for the closed-loop control algorithm that is independent of an exact mathematical model (space-state model, F.E.M., etc.) of plant dynamics and which is based on fuzzy logic is presented. First, the behavior of the open-loop system is observed. Then, the control force applied to the system emulates the behavior of a dynamic vibration absorber which is tuned to the measured fundamental frequency. This approach not only assures inherent stability associated with passive absorbers, but also circumvents the phenomenon of modal spillover. The damping and the mass ratios of the absorber adapt themselves by using a fuzzy decision-making process. This results in relatively quick settling times, low overshoots and dying out of vibration within a few seconds.\n\nWhen the control force is turned off after a mere 16 seconds, almost all the vibrational energy is dissipated. In addition, the performance of the AFCA is insensitive to varying initial conditions. To demonstrate the robustness of the control system to changes in the temporal dynamics of the cantilever beam, the transient response to a considerably perturbed plant is simulated. The Young's modulus of the beam was raised as well as lowered substantially, thereby significantly perturbing the natural frequencies of vibration. The mode shapes, however, remain unchanged. For these cases, too, the AFCA provides similar settling times and rates of vibrational energy dissipation."],"license_tesim":["http://rightsstatements.org/vocab/InC/1.0/"],"date_created_tesim":["1997-03"],"source_tesim":["Journal of Intelligent Material Systems and Structures"],"thumbnail_path_ss":"/downloads/bc386t32s?file=thumbnail","suppressed_bsi":false,"actionable_workflow_roles_ssim":["admin_set/default-default-depositing"],"workflow_state_name_ssim":["deposited"],"member_ids_ssim":["bc386t32s"],"file_set_ids_ssim":["bc386t32s"],"visibility_ssi":"open","admin_set_tesim":["Default Admin Set"],"sort_title_ssi":"MODELINDEPENDENT VIBRATION CONTROL OF FLEXIBLE BEAMLIKE STRUCTURES USING A FUZZY BASED ADAPTATION STRATEGY","human_readable_type_tesim":["Article"],"read_access_group_ssim":["public"],"read_access_person_ssim":["konecnmc@ucmail.uc.edu"],"edit_access_person_ssim":["cohenky@ucmail.uc.edu"],"nesting_collection__pathnames_ssim":["bc386t31h"],"nesting_collection__deepest_nested_depth_isi":1,"_version_":1697073736834875392,"timestamp":"2021-04-15T03:00:35.867Z","score":0.00049999997},{"system_create_dtsi":"2017-10-27T02:32:07Z","system_modified_dtsi":"2018-08-01T18:37:45Z","has_model_ssim":["Article"],"id":"bc386t29g","accessControl_ssim":["4ec369e2-d654-4d10-a36d-6e0440aa83a7"],"hasRelatedMediaFragment_ssim":["bc386t307"],"hasRelatedImage_ssim":["bc386t307"],"depositor_ssim":["cohenky@ucmail.uc.edu"],"depositor_tesim":["cohenky@ucmail.uc.edu"],"title_tesim":["An Adaptive Fuzzy Control Algorithm for Model-Independent Active Vibration Damping of Flexible Beam-Like Structures"],"date_uploaded_dtsi":"2017-02-08T00:00:00Z","date_modified_dtsi":"2017-04-05T00:00:00Z","isPartOf_ssim":["admin_set/default"],"proxy_depositor_ssim":["dungavjk@mail.uc.edu"],"doi_tesim":["10.1177/1045389X9600700208"],"journal_title_tesim":["Journal of Intelligent Material Systems and Structures"],"college_tesim":["Engineering and Applied Science"],"department_tesim":["Aerospace Engineering and Engineering Mechanics"],"note_tesim":["This work was part of a pilot \"mediated-deposit model\" where library staff found potential works, later submitted for faculty review"],"creator_tesim":["Abramovich, Haim","Weller, Tanchum","Cohen, Kelly","Levitas, Joseph"],"language_tesim":["English"],"description_tesim":["The present study deals with an AFCA (Adaptive Fuzzy Control Algorithm) for an Euler-Bemoulli approximation of a two-dimensional version of a cantilever beam-like orthogonal tetrahedral space truss. Transient disturbances, modeled as a unit impulse, excite all the modes of the beam. The resulting transverse displacement at the free end of the beam and its corresponding rate are observed by sensors placed there, and active control of the beam is provided by a collocated force actuator.\n\nA design methodology, based on fuzzy logic which assumes no a priori knowledge of plant dynamics, for the closed-loop control algorithm results in relatively quick settling times, low overshoots and dying out of vibration within a few seconds. The control algorithm is enhanced and made much faster by eliminating the need of repeatedly solving the set of differential equations of motion of an emulated dynamic vibration absorber. When the control force is turned off after a mere 15 seconds, almost all the vibrational energy is dissipated as the beam returns to its undisturbed state throughout its length. In addition, the performance of the AFCA is insensitive to varying initial conditions. To examine the robustness of the control system to changes in the temporal dynamics of the cantilever beam, the transient disturbance response to a considerably perturbed plant is simulated. The Young's modulus of the beam was raised as well as lowered by 60%, substantially perturbing the natural frequencies of vibration compared to the nominal plant. The AFCA provided similar settling times and rates of vibrational energy dissipation, satisfying the aim of plant model independence."],"license_tesim":["http://rightsstatements.org/vocab/InC/1.0/"],"date_created_tesim":["1996-03"],"source_tesim":["Journal of Intelligent Material Systems and Structures"],"thumbnail_path_ss":"/downloads/bc386t307?file=thumbnail","suppressed_bsi":false,"actionable_workflow_roles_ssim":["admin_set/default-default-depositing"],"workflow_state_name_ssim":["deposited"],"member_ids_ssim":["bc386t307"],"file_set_ids_ssim":["bc386t307"],"visibility_ssi":"open","admin_set_tesim":["Default Admin Set"],"sort_title_ssi":"ADAPTIVE FUZZY CONTROL ALGORITHM FOR MODELINDEPENDENT ACTIVE VIBRATION DAMPING OF FLEXIBLE BEAMLIKE STRUCTURES","human_readable_type_tesim":["Article"],"read_access_group_ssim":["public"],"read_access_person_ssim":["konecnmc@ucmail.uc.edu"],"edit_access_person_ssim":["cohenky@ucmail.uc.edu"],"nesting_collection__pathnames_ssim":["bc386t29g"],"nesting_collection__deepest_nested_depth_isi":1,"_version_":1697125529301286912,"timestamp":"2021-04-15T16:43:49.012Z","score":0.00049999997},{"system_create_dtsi":"2017-10-27T02:32:03Z","system_modified_dtsi":"2018-08-01T18:37:53Z","has_model_ssim":["Article"],"id":"bc386t27x","accessControl_ssim":["2f463021-8328-40e0-8bee-e4a9ea42f2cf"],"hasRelatedMediaFragment_ssim":["bc386t286"],"hasRelatedImage_ssim":["bc386t286"],"depositor_ssim":["cohenky@ucmail.uc.edu"],"depositor_tesim":["cohenky@ucmail.uc.edu"],"title_tesim":["Passive Damping Augmentation for Vibration Suppression in Flexible Latticed Beam-Like Space Structures"],"date_uploaded_dtsi":"2017-02-08T00:00:00Z","date_modified_dtsi":"2017-04-05T00:00:00Z","isPartOf_ssim":["admin_set/default"],"proxy_depositor_ssim":["dungavjk@mail.uc.edu"],"doi_tesim":["10.1006/jsvi.1994.1332"],"journal_title_tesim":["Journal of Sound and Vibration"],"college_tesim":["Engineering and Applied Science"],"department_tesim":["Aerospace Engineering and Engineering Mechanics"],"note_tesim":["This work was part of a pilot \"mediated-deposit model\" where library staff found potential works, later submitted for faculty review"],"creator_tesim":["Weller, T.","Cohen, Kelly"],"language_tesim":["English"],"description_tesim":["For a Timoshenko beam model the equations of motion, representing the anisotropic continuum model of a two-dimensional, latticed, large space structure, are extended to include coupling between the extensional, shear and bending modes. This analytical model, applied to a 20-bay, orthogonal, tetrahedral, cantilevered truss structure, is used to determine the transient response when subjected to a unit impulse. It is demonstrated that for beam-like structures having a fixed bending stiffness and beam mass an increase in diagonal stiffness, on account of the stiffness of the vertical girder, leads to a rise in the transverse shear rigidity. This results in higher natural frequencies and a reduction in peak displacement. In addition, in an asymmetrical truss configuration, coupling between the extensional and shear modes raises the maximum peak displacement compared to that obtained for a symmetric truss. The model is modified to investigate the introduction of passive damping in the form of several dynamic vibration absorbers. For a fixed absorber mass budget, a simple yet efficient absorber parameter optimization procedure, based on the classical steady state criteria of a 2-DOF system, is developed to design several absorbers each tuned to a different modal frequency. It is found that inclusion of transverse shear rigidity, as a design parameter in damping augmentation studies, reduces settling time for predetermined maximum peak displacements."],"license_tesim":["http://rightsstatements.org/vocab/InC/1.0/"],"date_created_tesim":["1994-08"],"source_tesim":["Journal of Sound and Vibration"],"thumbnail_path_ss":"/downloads/bc386t286?file=thumbnail","suppressed_bsi":false,"actionable_workflow_roles_ssim":["admin_set/default-default-depositing"],"workflow_state_name_ssim":["deposited"],"member_ids_ssim":["bc386t286"],"file_set_ids_ssim":["bc386t286"],"visibility_ssi":"open","admin_set_tesim":["Default Admin Set"],"sort_title_ssi":"PASSIVE DAMPING AUGMENTATION FOR VIBRATION SUPPRESSION IN FLEXIBLE LATTICED BEAMLIKE SPACE STRUCTURES","human_readable_type_tesim":["Article"],"read_access_group_ssim":["public"],"read_access_person_ssim":["konecnmc@ucmail.uc.edu"],"edit_access_person_ssim":["cohenky@ucmail.uc.edu"],"nesting_collection__pathnames_ssim":["bc386t27x"],"nesting_collection__deepest_nested_depth_isi":1,"_version_":1697095641371508736,"timestamp":"2021-04-15T08:48:45.661Z","score":0.00049999997}],"facets":[{"name":"human_readable_type_sim","items":[{"value":"Image","hits":4797,"label":"Image"},{"value":"Dataset","hits":3723,"label":"Dataset"},{"value":"Etd","hits":994,"label":"Etd"},{"value":"Document","hits":980,"label":"Document"},{"value":"Article","hits":967,"label":"Article"},{"value":"Student Work","hits":756,"label":"Student Work"}],"label":"Human Readable Type Sim"},{"name":"creator_sim","items":[{"value":"Snider, Jerry A. (senior collector)","hits":3484,"label":"Snider, Jerry A. (senior collector)"},{"value":"Tepe, Eric (record/image)","hits":3484,"label":"Tepe, Eric (record/image)"},{"value":"Huston, Ron","hits":2344,"label":"Huston, Ron"},{"value":"He, Si (co-collector)","hits":1093,"label":"He, Si (co-collector)"},{"value":"Meyer, David L.","hits":631,"label":"Meyer, David L."},{"value":"Davis, Jack","hits":611,"label":"Davis, Jack"}],"label":"Creator Sim"},{"name":"subject_sim","items":[{"value":"Kingdom: Plantae","hits":3453,"label":"Kingdom: Plantae"},{"value":"Phylum: Bryophyta","hits":3146,"label":"Phylum: Bryophyta"},{"value":"Class: Bryopsida","hits":2902,"label":"Class: Bryopsida"},{"value":"Biology","hits":2362,"label":"Biology"},{"value":"Order: Hypnales","hits":1190,"label":"Order: Hypnales"},{"value":"Order: Dicranales","hits":369,"label":"Order: Dicranales"}],"label":"Subject Sim"},{"name":"college_sim","items":[{"value":"Arts and Sciences","hits":6146,"label":"Arts and Sciences"},{"value":"Engineering and Applied Science","hits":2772,"label":"Engineering and Applied Science"},{"value":"Design, Architecture, Art and Planning","hits":1236,"label":"Design, Architecture, Art and Planning"},{"value":"Other","hits":1070,"label":"Other"},{"value":"Libraries","hits":671,"label":"Libraries"},{"value":"Education, Criminal Justice, and Human Services","hits":543,"label":"Education, Criminal Justice, and Human Services"}],"label":"College Sim"},{"name":"department_sim","items":[{"value":"Biological Sciences","hits":3503,"label":"Biological Sciences"},{"value":"Mechanical and Materials Engineering","hits":2264,"label":"Mechanical and Materials Engineering"},{"value":"Other","hits":992,"label":"Other"},{"value":"Simpson Center for Urban Futures ","hits":784,"label":"Simpson Center for Urban Futures "},{"value":"Classics","hits":769,"label":"Classics"},{"value":"Romance \u0026 Arabic Languages \u0026 Literat","hits":644,"label":"Romance \u0026 Arabic Languages \u0026 Literat"}],"label":"Department Sim"},{"name":"language_sim","items":[{"value":"English","hits":1957,"label":"English"},{"value":"en_US","hits":224,"label":"en_US"},{"value":"English ","hits":145,"label":"English "},{"value":"Russian","hits":34,"label":"Russian"},{"value":"Spanish","hits":24,"label":"Spanish"},{"value":"German","hits":19,"label":"German"}],"label":"Language Sim"},{"name":"publisher_sim","items":[{"value":"University of Cincinnati, Margaret H. Fulford Herbarium (CINC)","hits":3484,"label":"University of Cincinnati, Margaret H. Fulford Herbarium (CINC)"},{"value":"University of Cincinnati","hits":3011,"label":"University of Cincinnati"},{"value":"University of Cincinnati: Romance and Arabic Languages and Literatures","hits":603,"label":"University of Cincinnati: Romance and Arabic Languages and Literatures"},{"value":"University of Cincinnati ","hits":100,"label":"University of Cincinnati "},{"value":"viDEO sAVant","hits":92,"label":"viDEO sAVant"},{"value":"Benjamin Britton","hits":60,"label":"Benjamin Britton"}],"label":"Publisher Sim"},{"name":"date_created_sim","items":[{"value":"2017","hits":2305,"label":"2017"},{"value":"","hits":211,"label":""},{"value":"2001-03-31","hits":181,"label":"2001-03-31"},{"value":"2017-10-31","hits":163,"label":"2017-10-31"},{"value":"2001-03-30","hits":156,"label":"2001-03-30"},{"value":"2001-03-29","hits":127,"label":"2001-03-29"}],"label":"Date Created Sim"},{"name":"member_of_collection_ids_ssim","items":[{"value":"1r66j250c","hits":3484,"label":"1r66j250c"},{"value":"79407x47z","hits":2123,"label":"79407x47z"},{"value":"05741w32f","hits":341,"label":"05741w32f"},{"value":"bc3871882","hits":225,"label":"bc3871882"},{"value":"x346d4806","hits":219,"label":"x346d4806"},{"value":"bc387z838","hits":189,"label":"bc387z838"}],"label":"Member Of Collection Ids Ssim"},{"name":"generic_type_sim","items":[{"value":"Work","hits":12586,"label":"Work"},{"value":"Collection","hits":174,"label":"Collection"}],"label":"Generic Type Sim"}],"pages":{"current_page":1100,"next_page":1101,"prev_page":1099,"total_pages":1276,"limit_value":10,"offset_value":10990,"total_count":12760,"first_page?":false,"last_page?":false}}}