摘要
反作用飞轮和磁力矩器是现代小卫星姿态控制的主要执行机构,针对反作用飞轮故障情况,提出一种使用磁力矩器和反作用飞轮联合控制的故障处理方案.首先给出了具有控制分配环节的联合控制方案,在此基础上推导了故障模式下的控制分配策略和磁卸载算法.最后进行数学仿真,结果表明该算法在飞轮故障时能够动态实现故障隔离和系统重构,有效完成小卫星高精度姿态控制任务,且该方法鲁棒性能好、设计简单、易于在轨实时计算.
Magnetorquers and reaction wheels are the important control actuators for modem small satellites. A combined control method is proposed on the bases of both reaction wheels and magnetorquers to be used in the case of reaction wheel failed. A combined control scheme is firstly provided when control allocation is used, and then control techniques are developed to automatically reistribute the required control torque among residual reaction wheels and magnetorquers. Numerical simulations demonstrate the proposed technique can dynamically achieve failure isolation and system reconfiguration, and can also finish the high accuracy attitude control task of small satellite. It also prolongs life of space task. Another point is its excellent robustness, simple design, and real time calculation on-board.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2007年第5期811-816,共6页
Journal of Harbin Institute of Technology
基金
长江学者和创新团队发展计划资助项目(IRT0520)
关键词
小卫星
姿态控制
反作用飞轮故障
磁力矩器
联合控制
small satellite
attitude control
reaction wheel failure
magnetorquer
combined control
