OPTIMAL VIBRATION CONTROL BY THE USE OF PIEZOCERAMIC SENSORS AND ACTUATORS

摘要: In this paper, a discrete degrees of freedom model has been formulated for structural dynamic system consisting linear elastic structure, bonded piezoceramic sensors and actuators, feedback signal conditioning system. addition, an optimal control procedure based on the minimization quadratic performance index state vectors developed that uses output methods. Finally, application technique demonstrated through example beam with actuators occupying subdomains upper lower surfaces. A obtained by using test results identification method equation error approach. Results various weights in are included, implications future applications discussed. N past few years, there considerable research activity field active passive vibra- tions flexible structures. One methods con- trol vibrations, termed "electronic damping" some early literature,1'6 involves placement devices structure to sense strains induced vibrations. The deformation sens- ing transducer electrical current is condi- tioned operations such as amplification shifting phase signal. conditioned then applied another piezoceramic, electrostrictive, or magnetostrictive device placed at selected location structure. This trans- ducer acts actuator transmits mechanical energy Depending voltage, electrome- chanical coupling forcing transducers, degree vibration structures can be achieved. To date, applica- aforementioned scheme have primarily area large space structures, work Crawley Deluis,7 but applicable any lightweight components. type offers unique features not usually employed dynamics direct contact permit wide frequency range control. measure tunability provided systems age grow. adds little mass controlled so existing plant does need modified account transducers. utilize advantages it necessary select appropriate positions transducers sensor signals fed back actuators. problem selecting locations complete itself thus will addressed paper. There