压电自适应桁架结构主动控制模型及实验

为提高结构对外部环境的抗干扰能力,构造了压电柔性自适应桁架结构,并对其主动控制进行了研究.由传感器、作动器与柔性梁组成压电自适应桁架结构.基于自适应结构的机电耦合理论,在测量位移的情况下,采用改进的二次积分力反馈控制方法研究了空间压电柔性自适应桁架结构的振动主动控制问题.建立了压电柔性自适应桁架结构主动控制实验系统,并对这类自适应结构进行了实时计算机振动主动控制实验研究.实验研究表明柔性自适应桁架结构能够改善结构的动力学特性,对外界的干扰具有良好的自适应性.

Active control of dynamic response of a piezoelectric adaptive truss structure: modeling and experiment

An active control method of a piezoelectric flexible adaptive truss structure was presented to develop high performance structural systems with dynamic vibration, which can be used with smart actuators and sensors to control the shape and suppress the vibration of the flexible adaptive truss structure. The piezoelectric adaptive truss structure was composed of piezoelectric ceramic sensors, actuators, and flexible beams. An active vibration control of piezoelectric flexible adaptive truss structure in space was developed by the method of an improved integral plus double integral force feedback under measuring the displacement, using the mechanical-electro coupled theory of the adaptive structure. An active vibration control system for the piezoelectric flexible adaptive truss structure was set up for real-time computer active vibration control experimental tests. The experiment results show that the dynamic performance of the truss structure can be easily improved and the control system has good dynamic behavior to uncertainties and disturbance inputs.