磁流变整星隔振平台频域加权LQR控制研究  

FREQUENCY-SHAPING LQR CONTROL OF WHOLE-SPACECRAFT VIBRATION ISOLATION PLATFORM BASED ON MR DAMPER

作　　者：王檑 潘忠文 陈照波[2] WANG Lei;PAN Zhongwen;CHEN Zhaobo(Beijing Institute of Space System Engineering, Beijing 100076, China;School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 15000)

机构地区：[1]北京宇航系统工程研究所,北京100076 [2]哈尔滨工业大学机电工程学院,哈尔滨150001

出　　处：《力学与实践》2018年第2期173-179,共7页Mechanics in Engineering

基　　金：国家自然科学基金(11372083);中国运载火箭技术研究院创新基金资助项目

摘　　要：设计磁流变六杆隔振平台,以改善星箭界面低频振动环境.采用牛顿-欧拉法建立整星隔振平台动力学模型,利用固定界面模态综合法得到卫星和隔振平台动力学模型.由于星箭界面低频振动环境在特定频段存在振动量级较大的问题,采用频域加权LQR(linear quadratic regulator)方法,利用直接分解法扩展系统状态变量,进行磁流变阻尼器半主动控制系统设计.仿真结果表明,相对传统控制方法,频域加权LQR方法在特定频段减振效果明显改善,且在其他频段没有恶化,验证了算法有效性.To improve the interface vibration environment of the satellite and the rocket,a magnetorheological six-pole vibration isolation platform is designed. The dynamic model of the satellite vibration isolation platform is established by using the Newton--Euler method. The dynamic model of the satellite and the vibration isolation platform is built by using the fixed interface modal synthesis method. In order to study the specific frequency band attenuation, the frequency-shaping LQR（linear quadratic regulator） method which extends the system state variables by direct decomposition is used to design the semi-active control system of magnetorheological damper. The simulation results show that the frequency-shaping LQR method is better than the traditional control method, and the control effect is not deteriorated in other frequency bands. The effectiveness of the algorithm is verified.

关 键 词：整星隔振平台 磁流变阻尼器 牛顿-欧拉法 模态综合 频域加权 

分 类 号：O328[理学—一般力学与力学基础]