基于概率方法的航天器姿态控制系统参数设计

针对传统航天器控制系统参数设计方法中存在的设计保守、主观经验性较强等缺点,使用概率分布对参数不确定性进行量化描述,采用概率指标代替确定性指标,对参数随机分布的系统进行概率分析,并使用可行域图对设计空间进行表征。在此基础上,应用概率优化方法对控制器参数进行优化设计。最后,通过实例对提出的方法进行仿真验证。仿真结果表明,概率分析方法能够放宽参数的设计空间,通过概率优化方法可以得到满足概率指标要求的设计结果,提高了设计效率。

Probability based method for attitude control system parameters design of space vehicle

For the shortcomings of conservatism and empiricism existed in prevailing methods in control system parameters design of space vehicle, the uncertainty is described by probability distribution and probabilistic metrics are used instead of deterministic ones. The system with random coefficients is analyzed and feasible region diagram is used to describe the available space for design parameters. Then, reliability-based optimization method is used to get parameters fulfilling the probabilistic metrics efficiently. At last, instances are given to validate the proposed method. Results indicate that probability method can significantly enlarge the design space and the reliability-based optimization can give satisfactory control parameters and improve the design process efficiently.