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建立了有纵向单滑块的变质心再入飞行器系统控制模型。对该有输入非线性的快时变多体系统,考虑系统存在参数不确定等因素的影响并将完整的活动质量体动力学环节置入姿态控制,基于滑模控制理论设计了俯仰姿态跟踪鲁棒控制系统。在参数不确定性条件下对飞行控制系统进行了仿真。结果表明:设计的控制律可实现对指令角度和指令位置有效、快速、稳定跟踪,滑块伺服驱动力保持在合理范围内。
The control model of the modified core reentry vehicle system with longitudinal single slide is established. Considering the uncertainties of the existence of parameters in the system with the input nonlinear time-varying multi-body system and putting intact mass-motion dynamics into attitude control, a sliding attitude control tracking system is designed based on the sliding mode control theory Stick control system. The flight control system is simulated under the condition of parameter uncertainty. The results show that the designed control law can effectively, quickly and stably track the command angle and command position, and keep the servo drive force of the slider within a reasonable range.