自适应动态径向基函数网络死区补偿控制  

Compensation control for dead-zone by adaptive dynamic radial basis function network

作　　者：李妍[1] 毛志忠[1] 王琰 

机构地区：[1]东北大学信息科学与工程学院,辽宁沈阳110004 [2]辽阳市发展和改革委员会,辽宁辽阳111000

出　　处：《控制理论与应用》2009年第12期1395-1400,共6页Control Theory & Applications

基　　金：国家高新技术研究发展计划(2007AA04Z194;2007AA041401)

摘　　要：死区非线性存在于许多实际系统中,这将影响控制系统的性能,甚至会造成系统不稳定.为了补偿动态系统中的死区非线性,提出一种基于自适应动态径向基函数网络(DRBF)的死区补偿控制方法.先用自适应DRBF网络在线补偿未知死区产生的不良影响;对于补偿后的动态系统,设计一个与DRBF网络并联的线性控制器.通过Lyapunov方法证明闭环系统的稳定性.以液压系统为例进行仿真,仿真结果表明本文方法能有效地消除控制系统的稳态误差,减少计算量,而且控制信号没有频繁振荡.Dead-zone nonlinearity exists in many practical systems, which deteriorates the performance of control system and even causes the instability of the system. In order to compensate the dead-zone nonlinearity in the dynamic system, a dead-zone compensation control algorithm based on adaptive dynamic radial basis function network（DRBF） is presented for eliminating the undesirable effects caused by the unknown dead-zone. A linear controller paralleled with the DRBF network is designed for the compensated dynamic system. The closed-loop system stability is proved by Lyapunov method. The simulation research was performed in a hydraulic system. The results show that this proposed algorithm effectively eliminates the steady-state error, reduces the computation complexity, and makes the control signal less oscillatory.

关 键 词：液压系统 死区非线性 动态径向基函数 LYAPUNOV稳定性 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]