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针对CAV再入标准轨迹制导问题,提出了一种新的基于模糊滑模的纵向轨迹制导方案,根据CAV状态模型的特点和模糊系统设计要求,对其纵向运动学方程进行了简化处理,设计了模糊逼近+切换控制律补偿的控制器,利用模糊系统的万能逼近特性来对倾侧角增量进行逼近,用切换控制率来补偿逼近误差。仿真验证了该方案能够实现对纵向轨迹的精确跟踪,且具有较好的鲁棒性和实时性。
Aiming at the problem of CAV re-entry standard trajectory guidance, a new longitudinal trajectory guidance scheme based on fuzzy sliding mode is proposed. According to the characteristics of CAV state model and the requirements of fuzzy system design, the longitudinal kinematics equation is simplified and designed Fuzzy approximation + switching control law compensation controller, the use of universal approximation of fuzzy systems to approximate the tilt angle increment, with switching control rate to compensate for the approximation error. The simulation results show that this scheme can accurately track the longitudinal trajectory and has good robustness and real-time performance.