单轴台的大角度姿态快速机动联合控制方法

摘要

To validate the large angle attitude maneuver control and precision stabilization of a small satellite,a hybrid control method for a single-axis air bearing table (SABT) was proposed,using four thrusters and a flywheel to perform the scheme.The phase plane approach and finite-time control theorem was used to design the controller.In this control scheme,the four thrusters were firstly actuated to achieve a fast slew maneuver without overshoot,and the flywheel was then actuated to perform the high precision stabilization in limited time.The method defined an intelligent switch between the two actuators in real time.Physical simulation results show that the method can achieve the large angle maneuver of the SABT in limited time,and can effectively avoid the overshoot of the maneuver,the chattering of the thrusters and the saturation of the flywheel.%为验证小卫星大角度姿态快速机动与高精度稳定控制能力,基于单轴气浮台硬件仿真环境,提出了一种利用推力器与飞轮组合的联合控制策略.采用相平面控制技术与有限时间控制理论设计控制器,利用推力器实现无超调的快速机动控制,利用飞轮实现有限时间内的高精度稳定控制,使单轴台在有限时间内快速高精度稳定于目标姿态.物理仿真结果表明:该方法在有限时间内完成单轴台快速稳定控制的同时,可有效避免机动过程中的超调现象,且能有效规避推力器的频繁开关与飞轮的过快饱和等问题.