摘要
针对协方差分析描述函数法(Covariance Analysis Describing Function Technique,CADET)在分析存在内部参数摄动的不确定系统时精度不高的问题,提出了一种分析存在内部参数摄动的导弹姿态控制系统新型精度分析方法。结合传统的CADET方法,对含有参数摄动的广义非线性项进行统计线性化,得到状态均值和协方差的增广传播方程,采用改进的CADET方法对某型号导弹的姿态控制系统进行了数学仿真。仿真结果表明了改进的CADET方法可快速、有效分析存在外部干扰和内部参数摄动系统的精度。
Covariance Analysis Describing Function Technique （CADET） is considered too crude for precision a- nalysis of systems with parametric perturbation . We present new precision analysis method for missile attitude con- trol system with parametric perturbation considered. Based on the traditional CADET method, the generalized non- linear part including parametric perturbation is statistically linearized. The differential equations of state mean and covariance are obtained. We simulate a missile attitude control system, using respectively modified CADET method and Monte Carlo method. The results and their analysis show preliminarily that modified CADET method can indeed analyze the precision of missile attitude control system with both disturbance and parametric perturbation.
出处
《西北工业大学学报》
EI
CAS
CSCD
北大核心
2013年第4期560-564,共5页
Journal of Northwestern Polytechnical University
基金
航天支撑基金(N11XW0001)资助
关键词
精度分析
参数摄动系统
改进的协方差分析描述函数法
姿态控制系统
attitude control, differential equations, mathematical models, Monte Carlo methods, sliding mode control, statistical methods, uncertain systems, variable structure control
modified CADET （covari-ance analysis describing function technique）, parametric perturbation, precision analysis
