关键词: 自适应桁架结构, 振动控制, 实验研究

Abstract: An active control method of a flexible space self-adaptive truss structure was presented to develop high performance structure systems with dynamic perturbations, which could be used with actuators and sensors to control the vibration of flexible structure. The real-time computer control experiment was based on dSPACE data acquisition and processing system, piezoelectric sensor, piezoelectric actuator, truss structure and computer measurement and controlling system. Based on the finite element theory, an improved integral plus double integral force feedback method for active vibration control of flexible space self-adaptive truss structure was developed. With the sinusoidal frequency input signal, the experiment was accomplished in time and suggested the results of displacement suppress and power spectrum density changing at the direction of 18x node and displays correspond response graph before and after controlling. The results of experiments indicated that the control strategy was correct and effective in suppressing the low frequency and large amplitude vibration of flexible space structures.

Key words: self-adaptive truss structure, vibration control, experimental study