VIBRATION SUPPRESSION USING ACCELERATION FEEDBACK-CONTROL WITH MULTIPLE PROOF-MASS ACTUATORS

The use of direct acceleration feedback control for vibration suppress ion of low-frequency multi-degree-of-freedom flexible structures using multiple proof-mass actuators is investigated. Considering the effect of actuator dynamics, closed-loop eigenvalue analysis is conducted, s ind a simple matrix inequality is obtained for the stability condition of the closed-loop system, Methods for calculation of the stability c ondition are suggested. A procedure for actuator parameter optimizatio n is proposed to assure the closed-loop system performance, Using both a lumped-mass space structure model and a frame structure model, nume rical analysis and simulations are performed, and several aspects rela ting to control design are discussed. The results indicate the effecti veness of acceleration feedback control for low-frequency vibration su ppression using proof-mass actuators.