Research And Experiment, Active Vibration Control Of Piezoelectric Truss Structure

In this paper, researches were made on a space piezoelectric truss. First, based on the piezoelectric theory and FEM (Finite Element Method) analysis and knowledge of active vibration control, theoretical analysis and numerical simulation was carried on. And then, an experiment upon real-time active vibration control of the truss by computer was carried out.The-truss was designed and assembled first. Low order modes of the truss were measured in experiment through LMS system and other program, also the vibration response of the truss under excitation. Then the normal modes analysis and direct transient response analysis was calculated through general FEM soft, and the results agreed well with the experiment datum. After that, the active vibration control model was built according to the datum and results to analyze the affect to control effect of sample time and PID parameters. Finally, the active vibration control experiment was carried out, and the datum measured indicated that resonate under first mode of the truss was successfully controlled by the PID controller.