多输入多输出随机振动试验变参数PID控制  

PID Control with Variable Arguments for MIMO Random Vibration Test

作　　者：崔旭利[1] 陈怀海[1] 贺旭东[1] 游伟倩[1] 

机构地区：[1]南京航空航天大学振动工程研究所飞行器结构力学与控制教育部重点实验室,江苏南京210016

出　　处：《航空学报》2010年第9期1776-1780,共5页Acta Aeronautica et Astronautica Sinica

基　　金：国家自然科学基金(10972104)

摘　　要：对多输入多输出(MIMO)随机振动试验控制的基本过程进行了系统分析。定义了一种新的在对数坐标下的控制误差表达式,然后在控制算法中引入了新的比例-积分-微分(PID)控制策略,并给出了PID参数随误差变化的规律。以悬臂梁为控制对象,完成了两输入两输出随机振动试验。结果表明:变参数PID控制方法能在保证快速均衡的基础上,有效地减小功率谱和参考谱之间的相对误差以及加速度总均方根值的控制误差,提高随机振动试验的控制精度。The basic procedure of a multi-input multi-output （MIMO） random vibration test is analyzed systematically in the article. A definition of control error under logarithmic coordinates is provided, and a new proportion-integration differentiation （PID） control strategy is introduced into the control algorithm. The law of the error-dependent arguments for the PID controller is then presented. A two-input two-output random vibration test is performed with a cantilever beam to verify the proposed control method. The experimental results show that the variable argument PID control method not only has the ability to make rapid tradeoff between the control and the reference spectra but it can also reduce effectively the errors between them as well as the control error of the total root mean square of acceleration. Therefore the accuracy of random vibration test control is improved.

关 键 词：多输人多输出 环境试验 振动控制 PID控制 变参数 

分 类 号：V216.21[航空宇航科学与技术—航空宇航推进理论与工程] O324[理学—一般力学与力学基础]