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使用反馈线性化与改进的模糊控制方法设计飞机纵向自动着陆控制系统。通过状态变换输出与新输入间的线性微分关系使非线性飞机方程反馈线性化,将原非线性系统解耦为一个一阶和一个二阶线性系统。同时,采用带优化修正函数的无量化模糊控制器,使系统能在比较粗糙的初始规则基础上自动寻找较理想的控制规则。其纵向着陆仿真研究,主要考虑下滑段和拉平段。仿真表明,该控制系统能满足纵向着陆误差要求,具有良好的动、静态特性和鲁棒性。
Using Feedback Linearization and Improved Fuzzy Control Method to Design Aircraft Longitudinal Automatic Landing Control System. The linear differential equations of the nonlinear aircraft equations are linearly linearized by linear differential relations between the state transition output and the new input. The original nonlinear system is decoupled into a first order and a second order linear system. At the same time, a non-quantitative fuzzy controller with optimization correction function is adopted to make the system automatically find the ideal control rules based on the rough initial rules. Longitudinal landing simulation study, the main consideration of sliding section and leveling section. Simulation results show that the control system can meet the requirements of longitudinal landing error, has good dynamic and static characteristics and robustness.