Model analysis and active vibration control for space deployable truss type mast

Dynamic model of the large space deployable truss type mast is established. The first several natural frequencies, the vibration model shapes and the corresponding distribution of the longerons model strain energy are given based on the analysis of the modes of the truss type mast. Use the distribution of the longerons´ model strain energy as an interpretational criterion to optimize actuator´s placement. The independent modal space method and theory of quadratic optimal control are adopted to suppress the vibration of the truss type mast by MATLAB/SIMULINK simulation. The result shows that the control method is available.