整星隔振器的无源控制设计  

Passive Control Design of Whole-spacecraft Isolators

作　　者：刘芳[1] 雷霆[2] 方勃[1] 

机构地区：[1]哈尔滨工业大学航天学院,哈尔滨150001 [2]北京强度环境研究所,北京100076

出　　处：《力学季刊》2009年第1期77-81,共5页Chinese Quarterly of Mechanics

基　　金：国防科技工业民用航天科研预先研究项目

摘　　要：在卫星的寿命周期内,发射过程中的振动环境最为恶劣。为了改善卫星发射过程中的力学环境,提高卫星发射的可靠性和降低卫星成本,整星隔振技术得到了各国的高度重视。整星主被动一体化隔振技术可以有效隔离火箭传递到卫星的振动,改善卫星在发射中的力学环境并提高发射可靠性。系统无源性与耗散性和稳定性之间有着紧密的联系,无源性控制的关键问题是如何使系统无源化,正实引理建立了频域框架下系统的正实性条件和时域里状态空间相应正实性条件的等价关系,因此对于线性定常系统来说,无源性又等价于正实性。本文针对一种新型圆盒式隔振器,基于无源系统理论、正实控制器设计和LMI线性矩阵不等式方法,进行了整星隔振器的控制系统设计。仿真结果表明,本文所设计的控制器能很好地抑制火箭传递到卫星的振动,同时具有良好的鲁棒性。The vibration environments in launching process were the worst of satellite＇s life cycle. In order to better the mechanical environments of satellite in launching stage, improve the reliability of satellite launches and reduce the cost of satellite, the whole spacecraft isolation technique has been attached great importance in all countries. Whole spacecraft isolation technique can effectively isolate the vibration transformed from rocket to satellite, improving the mechanical environment and increase the reliability in launching stage. System＇s passivity has close contact with its dissipative and stability, the key problem of passive control was to make the system passive, the positive real lemma makes an equivalence relationship between positive real conditions in frequency-domain and corresponding positive real condition of statespace in time-domain, thus the passivity was equivalent to positive realness for linear systems. An active control system was designed based on passive theory, positive real control and LMI inequality method for a new orbicular box-type vibration isolator. Simulation results show that the designed controller has effective vibration suppression and strong robustness .

关 键 词：整星隔振 无源化 正实控制 LMI不等式 

分 类 号：V414.3[航空宇航科学与技术—航空宇航推进理论与工程]