摘要
针对模型不确定情况下硬盘电机伺服系统的精确控制问题,给出了硬盘电机伺服系统的控制关系模型。采用优化H∞控制技术设计了简单高效的鲁棒控制器,并通过控制关系模型估算和闭环控制器衰减使控制器降阶,可以降低控制器设计的复杂度,有效改善系统频率响应,满足设计带宽要求。仿真实验结果表明,系统能够提供的最大带宽和设计带宽相一致,说明了低阶鲁棒控制器的有效性。
Aiming at precisely control problem for a hard disk motor servo system in the presence of model uncertainty, control-relevant model of hard disk motor servo system is given, and a simple and efficient robust controller is designed with optimal H∞ control technology, the full-order controller is reduced by control-relevant model estimation and the closed-loop controller reduction technique, so the controller complexity can be reduced, the system frequency responses can be improved effectively, and meet the designed bandwidth requirements. The simulation results show that the largest bandwidth provided by the system is in accord with the designed bandwidth, and the effectiveness of the low-order robust controller is proved.
出处
《计算机工程与设计》
CSCD
北大核心
2010年第8期1866-1869,共4页
Computer Engineering and Design
基金
河北省自然科学基金项目(E2008000050)
关键词
不确定
伺服系统
加权函数
模型
鲁棒控制
uncertainty
servo system
weighting functions
model
robust control
