Active Vibration Control by Harmonic Input Compensation for Piezoelectric Stack Actuator Nonlinearity

摘要: I N AN active vibration control system, the actuator as important component has a significant influence on performance. The piezoelectric stack (PSA) is an effective with lots of advantages, such large force output, light weight, and wide range working frequency, it been used more for control. Recently, PSA successfully helicopter reduction in fullscaled rotors by Straub et al. [1] Konstanzer [2] Machscaled byCrozier [3]. Lee andChopra [4] investigated stack-driven trailing-edge flap actuation device conjunction amplification mechanism suppression. Viswamurthy Ganguli [5] studied optimal placement actuated flaps Song Xia [6] Heverly [7] structural response using PSAs based reduced fuselage models. However, nonlinear hysteresis characteristics PSAmay have effect structure. [8] effects cycle actively controlled aeroelastic simulation, they indicated that inaccuratemodeling lead to erroneous prediction input real path including nonlinearity, which turn may affect performance.Muir [9] assessed importance noise rotorcraft noticeable blade–vortex interaction Due characteristic material, output contain higher harmonic components, reduce For investigating nonlinearity performance, somemodels simulating established Croft Devasia [10], Iyer [11], [12]. Sutton Elliott [13] proposed reference signals be first prefiltered unit, then adaptively adjusted path. Pasco Barry [14] mathematical model prefiltering signal investigation compensation its isolation system vibration. Zhou [15] mapping ability artificial neural network combine networks adaptive algorithm compensate Generally, very complicated establish dynamic simulate actuator, performance affected inaccurate or time delay. In this Note, method PSA’s presented, avoiding complexity modeling nonlinearity. influence, method, experiments free– free beam structure were investigated.