Abstract: The modeling and displacement tracking control of piezoceramic actuator with complex nonlinear hysteresis behaviour is studied. First

a novel PECLP model is proposed by using the state space function. In this model

the intrinsic dynamic nonlinearity is combined into the piezoceramic stack’s hysperesis for the first time

and the dynamics of elastic and motive components within actuator are considered simultaneously. Then

the input-output linearization theory of differential geometry is utilized to deduce a simplified subsystem provided with linear normal form. By adopting this subsystem

a LQ based nonlinear displacement tracking control system is developed for piezoceramic actuator. At last

some computer simulations are conducted. In contrast with conventional control system

the simulation results show that the developed nonlinear displacement tracking control system exhibits the better tracking precision without static error

and global optimization of system dynamic capability. Furthermore

the frequency bandwidth is expended by one order of magnitude approximately from 638Hz to 5217Hz at -3dB. A satisfied high-speed frequency response characteristic can be achieved.