A new auto tuning procedure for PI/D controller based on phase and amplitude margin specifications was proposed.The procedure applied a modified relay feedback experiment to identifying the process frequency response ...A new auto tuning procedure for PI/D controller based on phase and amplitude margin specifications was proposed.The procedure applied a modified relay feedback experiment to identifying the process frequency response of the point where the Nyquist curve intersects the negative imaginary axis,and the PI/D controller settings can be obtained based on this single point.The auto tuning method has all the merits of the tuning method that Astrom and Hagglund had proposed,and overcomes its problems.The simulation results show that the proposed tuning method has better performance than Astrom Hagglund’s tuning method.展开更多
高速飞行器再入过程中,具有参数大范围快速时变、强非线性的特性,对控制器的控制品质和稳定性提出了更高的要求。本文通过最优Oustaloup数字算法框图化实现分数阶PI^(λ)D^(μ)(Fractional-order PID,FOPID)控制器,建立高速飞行器参数...高速飞行器再入过程中,具有参数大范围快速时变、强非线性的特性,对控制器的控制品质和稳定性提出了更高的要求。本文通过最优Oustaloup数字算法框图化实现分数阶PI^(λ)D^(μ)(Fractional-order PID,FOPID)控制器,建立高速飞行器参数时变的非线性模型,结合ITAE(Integrated Time and Absolute Error)指标利用遗传算法(Genetic Algorithm,GA)寻优整定分数阶PI^(λ)D^(μ)参数,然后针对选定的分数阶PI^(λ)D^(μ)控制器,利用D-分解法分析高速飞行器的马赫数及攻角稳定区域。最后结合跟踪微分器设计了改进的分数阶PI^(λ)D^(μ)控制器。仿真结果表明,分数阶PI^(λ)D^(μ)控制器在具有更好的控制品质的同时可以在大范围内实现高速飞行器的稳定飞行。展开更多
文摘A new auto tuning procedure for PI/D controller based on phase and amplitude margin specifications was proposed.The procedure applied a modified relay feedback experiment to identifying the process frequency response of the point where the Nyquist curve intersects the negative imaginary axis,and the PI/D controller settings can be obtained based on this single point.The auto tuning method has all the merits of the tuning method that Astrom and Hagglund had proposed,and overcomes its problems.The simulation results show that the proposed tuning method has better performance than Astrom Hagglund’s tuning method.
文摘高速飞行器再入过程中,具有参数大范围快速时变、强非线性的特性,对控制器的控制品质和稳定性提出了更高的要求。本文通过最优Oustaloup数字算法框图化实现分数阶PI^(λ)D^(μ)(Fractional-order PID,FOPID)控制器,建立高速飞行器参数时变的非线性模型,结合ITAE(Integrated Time and Absolute Error)指标利用遗传算法(Genetic Algorithm,GA)寻优整定分数阶PI^(λ)D^(μ)参数,然后针对选定的分数阶PI^(λ)D^(μ)控制器,利用D-分解法分析高速飞行器的马赫数及攻角稳定区域。最后结合跟踪微分器设计了改进的分数阶PI^(λ)D^(μ)控制器。仿真结果表明,分数阶PI^(λ)D^(μ)控制器在具有更好的控制品质的同时可以在大范围内实现高速飞行器的稳定飞行。
