适应伺服机构卡死故障的控制指令重分配技术研究

提出一种能够适应运载火箭伺服机构卡死故障的控制指令重分配技术。在传统运载火箭控制系统设计过程中,伺服机构指令是在不考虑伺服机构故障时设计确定的,一旦伺服机构发生卡死故障将可能导致箭体姿态失稳。为了提高运载火箭的安全性和可靠性,根据某伺服机构卡死角度,通过控制指令在多个冗余伺服机构之间的重分配,在伺服机构卡死情况下仍能保证姿态稳定。仿真结果表明,即使某个伺服机构卡死也能保证姿态稳定,而且不需要重新设计控制参数。

Research on Reconfigurable Control Allocation Technology under Stuck Actuator Failures

The reconfigurable control allocation technology under stuck actuator failures is proposed in this paper. During the design of tradition launch vehicle control system, the actuator control command signal is confirmed without consideration the actuator failures. So the attitude of launch vehicle is unstable under stuck actuator failures. To improve the safety and reliability of the launch vehicle, the reconfigurable control allocation technology is used and control command signals of the other actuators are reconfigured according to one stuck angle. The simulation results demonstrate that this approach can guarantee that the attitude of launch vehicle is stable without control parameter redesigned.