CAJ | 학술논문

探讨一类yaw-pitch型结构的位标器在系统存在结构参数不确定性和执行元件存在输出饱和非线性的条件下的镇定问题。基于刚体动力学理论推导了二轴框架结构的动力学模型，得到了基座角运动因素导致系统参数摄动的机制，并以此为基础得到了系统的结构不确定性描述；基于区间矩阵保守稳定性的判别定理和线性矩阵不等式组，对系统的两类稳定空间进行保守估计，给出了系统可镇定的外界条件和镇定系统的状态反馈矩阵的寻优方法。所得结论可为优化设计稳定的位标器控制回路提供理论依据。
탐토일류yaw-pitch형결구적위표기재계통존재결구삼수불학정성화집행원건존재수출포화비선성적조건하적진정문제。기우강체동역학이론추도료이축광가결구적동역학모형，득도료기좌각운동인소도치계통삼수섭동적궤제，병이차위기출득도료계통적결구불학정성묘술；기우구간구진보수은정성적판별정리화선성구진불등식조，대계통적량류은정공간진행보수고계，급출료계통가진정적외계조건화진정계통적상태반궤구진적심우방법。소득결론가위우화설계은정적위표기공제회로제공이론의거。
This paper discusses the stabilization problem of a yaw-pitch gimbaled seeker system under the condition that system uncertainties and actuator saturation nonlinearity cannot be ignored. Based on gimbal dynamics, a dynamics model is formulated for the two-axis gimbaled seeker, and the perturbation effect of platform angular motion to system configuration is studied. The variation intervals of the perturbed parameters are furthermore estimated, and the uncertainty description of the gimbaled system is obtained. Two stable regions are conservatively estimated by judging the stability of interval matrix and solving the linear matrix inequalities (LMIs), respectively, and then the condition under which the two-axis gimbaled seeker can be stabilized and the method via which the system can be optimally stabilized are presented. The analysis method presented in this paper can provide guidelines for the optimal design of stable control loop for the two-axis gimbaled seeker.