圧電アクチュエータによる片持ばりの振動制御

抄録

The active vibration control of a steel cantilever beam with a piezoelectric ceramic actuator is presented. The actuator is bonded near the fixed end; the beam-actuator system acts as a monomorph mechanism. The control is the IMSC (independent modal-space control) based on the modal displacement estimation by the modal filter with an OP amplifier. The first mode is estimated with three modeled modes using two non-contact displacement sensors. The modal velocity is estimated with the Kalmam filter. The optimal regulator and relay controls were implemented with a personal computer. The relay controls yielded faster decay, since the actuator output can be applied more effectively. The linear velocity feedback was used instead of the dead zone, then the amplitude at the free end decayed to 1μm in 0.7 sec, when the initial amplitude was 1.0mm.