面向资源约束航天器控制系统的故障检测研究

摘要

Considering the spacecraft control system' s features such as closed-loop, limited resource and computational capacity constraint of the on-board computer, a fault detection scheme based on the coprime factorization and Youla parameterzation is proposed. Based on the kinematics and dynamics equations, a linearized model for the spacecraft attitude control system as well as its state space expression is obtained; in terms of the state observer, the coprime factorization and Youla parameterzation are used to analyze the relationships between the control signal and the control error and residual separately, then the residual only related to the control signal and the control error is obtained; The proposed method is validated and the simulation results show that without running the state observer in parallel, the residual equivalent to the one obtained by the sate observer expends much less time.%针对航天器控制系统的闭环特性和星载计算机存储空间和计算能力等资源受限的特点,研究基于互质分解技术和Youla参数化方法的故障检测方法.考虑航天器控制系统动力学方程和运动学方程,建立线性化系统模型,并给出状态空间表达形式；以状态观测器为基础,利用互质分解技术和Youla参数化方法分别研究控制信号和控制误差与残差的关系,进而给出只与控制信号和控制误差相关的残差设计方法；建立卫星闭环姿态控制系统仿真平台对算法进行仿真验证.仿真结果表明:由于在故障检测过程中避免了观测器的并行运行,因此所提方法在保证故障检测性能的前提下减少了计算量.