Fariborz Heidary - Mechanical Engineering Department, A. Hashemi Rafsanjani Engineering Campus, Central Branch of Islamic Azad University, Tehran, Iran,

Coupled and uncoupled thermoelasticity of structures with actuator and sensor and their control electronics are of importance to the high-performance structural systems. In this study, considering of the thermal effect in the precision of control dynamic systems for the condition of coupled and uncoupled thermoelastic composite plate are studied. The applications of the theory for temperature effects in the precision of dynamic systems with different control system are discussed and compared with each other. Using linear thermopiezoelastic theory and the first-order shear deformation assumptions, a generic thermopiezoelastic theory for piezolaminated composite plate with open loop and closed loop systems are derived. Finite element equations for the thermopiezoelastic media are obtained by using the linear constitutive equations in Hamilton’s principle together with the finite element approximations. The structure consists of a modeling of simply supported piezolaminated composite plate for open loop system with one actuator on top of the layers and one closed loop system with one actuator and sensor. The structure is modelled analytically and then numerically and the results of simulations are presented in order to visualize the states of their dynamics deformations and the state of thermal field. Various dynamic control systems could be used. One of them is the direct proportional feedback control algorithm in which a closed control loop to couple the direct and converse piezothermoelastic effects as a distributed system. It is found that the thermal loading and also the induced temperature is important in the precision control of dynamic piezoelectric plates

thermopiezoelastic, actuator, sensor, open loop control system, closed loop control system