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针对具有推力器执行机构的航天器,在一轴推力器失效的情况下,设计滑模变结构速率阻尼控制器,证明系统的稳定性;分析控制器的抗干扰能力,给出控制器参数选取的指导原则;通过将惯量积视为外界干扰的方法,解决了非对角惯量阵航天器的欠驱动控制设计问题.从工程实际情况出发,考虑了推力器的开关工作特性、角速度测量幅值受限、外界干扰和非对角惯量阵的影响.最后通过数学仿真验证了控制器的有效性和工程实用性.
For a spacecraft with a thruster actuator, a sliding mode variable structure speed damping controller is designed to prove the stability of the system in the event of a thruster failure. The controller’s anti-interference ability is analyzed and the parameters of the controller are given The problem of underactuated control design of spacecraft with non-diagonal inertial array is solved by considering the inertia product as the method of external disturbance.According to the actual situation of the project, the switching characteristics of the thruster, the amplitude of the angular velocity measurement Limited, external interference and non-diagonal inertia matrix.Finally, the validity of the controller and its engineering practicability are verified through mathematical simulation.