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针对标准轨迹制导对状态初值过于敏感以及鲁棒性较差的问题,在模糊滑模控制的基础上,提出了一种新的标准轨迹制导方式.通过滑模控制的鲁棒性来提升制导方法的适应能力,利用模糊系统的万能逼近特性来对不确定因素进行逼近,从而实现对不确定项的准确估计.对隶属度函数的建立原则进行了分析,结合再入特点建立了模糊滑模纵向制导方案,仿真结果验证了模糊逼近与状态反馈总控制律的有效性,在此基础上设计了侧向制导律.仿真结果表明:该方法能够在保证精度的同时提高标准轨迹制导的鲁棒性,使计算过程大大简化.
Aiming at the problem that standard trajectory guidance is too sensitive to the initial state value and the robustness is poor, a new standard trajectory guidance method is proposed based on fuzzy sliding mode control. The guidance is improved by the robustness of sliding mode control Method, adapting to the universal approximation property of fuzzy system to approximate the uncertainty, so as to realize the accurate estimation of the uncertain term.Analyzing the principle of establishing the membership function and combining with the characteristics of reentry, a fuzzy sliding mode The longitudinal guidance scheme and the simulation results verify the effectiveness of the generalized control law of fuzzy approximation and state feedback. On the basis of this, a lateral guidance law is designed. Simulation results show that this method can improve the accuracy of standard trajectory guidance So that the calculation process is greatly simplified.