摘要
研究了章动交叉反馈校正的参数设计方法。针对大惯量高速磁悬浮转子支承系统,采用双频Bode图进行章动稳定性分析。在此基础上,提出一种基于双频Nyquist曲线的交叉参数保相角裕度设计方法。在给定相位超前角的情况下,通过矢量合成确定章动交叉的比例系数和高通滤波器截止频率,实现了章动交叉反馈的鲁棒稳定设计。设计的交叉控制器使研制的磁悬浮控制力矩陀螺转子临界稳定转速由10 500 r/min提高到20 400 r/min。试验结果表明,保相角裕度方法为交叉反馈校正提供了有效的参数设计手段。
A parameter design method of nutation cross-feedback control is investigated. Based on nu tation stability analysis of a large-inertia and high-speed rotor using two-frequency Bode diagram, a new proof-phase-margin method of cross-feedback parameter design based on two-frequency Nyquist contour is proposed. The proportional coefficient and High-pass Filter （HPF） cutoff frequency of cross-feedback are determined by vectors combination to accomplish the robust design of nutation sta bility. Utilizing designed cross-feedback controller, nutation stability of rotor in the magnetically sus- pended control moment gyroscope is significantly improved and the critical speed of rotor increases from 10 500 r/rain to 20 040 r/rain. It can be concluded that the proposed method is effective for cross-feedback parameter design, which provides important foundation for rotor suspension stability of control moment gyroscope and momentum flywheel.
出处
《光学精密工程》
EI
CAS
CSCD
北大核心
2007年第6期858-865,共8页
Optics and Precision Engineering
基金
国家"863"计划高技术航天领域资助项目(No.2003AA741022)
关键词
磁轴承
陀螺效应
章动
稳定性
交叉控制
双频Nyquist曲线
magnetic bearing
gyroscopic effect
nutation
stability
cross-feedback control
two-fre quency Nyquist contour
