A high order finite element model of smart beam with distributed piezoelectric sensor and actuator layers was presented.The beam elements were developed incorporating the stiffness,mass and electromechanical coupling effects of the piezoelectric laminates. Considering the temperature difference in the large flexible space structures, the coupling effects between the temperature and mechanical of piezoelectric material were also taken into account.The simple negative feedback,constantgain negative velocity feedback,Lyapunov feedback as well as a linear quadratic regulator(LQR) approach were used for active vibration control with the structures subjected to impact excitations. The LQR approach was found to be more effective in vibration control with lesser peak voltages applied in the piezo actuator layers, but the thermal induced offset could not be controlled using the LQR scheme.