振动结构的多输入/多输出实时辨识控制与试验研究

发展了一种多输入/多输出、具有实时辨识和控制能力的自适应控制方法和控制系统,并将其应用于某自由-自由结构的振动控制。采用最小均方算法统一处理系统的实时辨识与控制问题,在没有任何受控结构特征信息的情况下,实现了对结构振动的自适应控制。控制系统由TMS320C30数字信号处理器和多通道数据采集卡构成,辨识与控制方法由TMS320C30数字信号处理器实现。对周期激励,在激励信号恒频率/恒振幅、变频率、变振幅时,受控结构的振动显著减小,各传感器测得加速度的平方和为无控时的1%或更小。

MIMO REAL-TIME IDENTIFICATION CONTROL AND EXPERIMENT OF VIBRATIONAL STRUCTURES

A MIMO adaptive control system which performs both system identification and control in real time has been developed and applied to a free free vibrational structure. The identification and control are realized in unison by the recursive least mean square. Vibrational structures without any information known in advance are controlled. The control system consists of a TMS320C30 data signal processing board, which is to calculate the identification and control algorithm, and a multi channel data acquisition board. For periodic excitations, the controller provides satisfactory vibration reduction in the cases of constant frequency/constant amplitude, varied frequency, and varied amplitude excitations. The sums of the squared accelerations in controlled cases are decreased to 1% of those in uncontrolled cases.