自动增益控制器(Auto Gain Controler,AGC)的作用是当输入信号的幅度在一定范围内变化时,能使输出保持稳定,当前该技术已广泛应用于无线通信和自动控制领域。本设计的核心在于其先进的闭环调节系统,该系统能够精确地监测并调整输出信号...自动增益控制器(Auto Gain Controler,AGC)的作用是当输入信号的幅度在一定范围内变化时,能使输出保持稳定,当前该技术已广泛应用于无线通信和自动控制领域。本设计的核心在于其先进的闭环调节系统,该系统能够精确地监测并调整输出信号的平均电平到期望电平(DSL)上,从而使输出平稳。展开更多
针对传统随机控制方法不能控制随机变量的高阶矩问题,提出一种基于粒子群-蒙特卡罗的概率密度函数(Probability Density Function,PDF)形状控制策略。通过设计多项式控制器和积分形式的目标函数,将PDF形状控制问题转化为控制器增益的优...针对传统随机控制方法不能控制随机变量的高阶矩问题,提出一种基于粒子群-蒙特卡罗的概率密度函数(Probability Density Function,PDF)形状控制策略。通过设计多项式控制器和积分形式的目标函数,将PDF形状控制问题转化为控制器增益的优化问题。采用粒子群算法优化PDF形状控制器的增益,同时引入蒙特卡罗方法求解定积分形式的目标函数,使得非线性随机系统状态变量的PDF形状与期望的PDF形状一致。实验结果表明,该控制策略能够解决PDF的形状控制问题,而且缩短了粒子群算法的计算时间,提升了粒子群算法在PDF形状控制器增益中的优化性能。展开更多
To deal with the high nonlinearities and strong couplings in the transition stage of tailsitter aircraft,an adaptive gainscheduling controller is proposed by combining the guardian maps theory and H∞control theory.Th...To deal with the high nonlinearities and strong couplings in the transition stage of tailsitter aircraft,an adaptive gainscheduling controller is proposed by combining the guardian maps theory and H∞control theory.This method is applied to track the flightpath angle of the transition stage of tailsitter aircraft,and compared with the linear quadratic regulator(LQR)method based on traditional gain scheduling.Simulation results show that the controller based on the guardian maps theory can autonomously schedule the appropriate control parameters and accomplish the stable transition.Besides,the proposed method shows better tracking performance than the LQR method based on traditional gain scheduling.展开更多
文摘针对传统随机控制方法不能控制随机变量的高阶矩问题,提出一种基于粒子群-蒙特卡罗的概率密度函数(Probability Density Function,PDF)形状控制策略。通过设计多项式控制器和积分形式的目标函数,将PDF形状控制问题转化为控制器增益的优化问题。采用粒子群算法优化PDF形状控制器的增益,同时引入蒙特卡罗方法求解定积分形式的目标函数,使得非线性随机系统状态变量的PDF形状与期望的PDF形状一致。实验结果表明,该控制策略能够解决PDF的形状控制问题,而且缩短了粒子群算法的计算时间,提升了粒子群算法在PDF形状控制器增益中的优化性能。
基金This work was supported by the Fundamental Research Funds for the Central Universities(No.NJ2018015)。
文摘To deal with the high nonlinearities and strong couplings in the transition stage of tailsitter aircraft,an adaptive gainscheduling controller is proposed by combining the guardian maps theory and H∞control theory.This method is applied to track the flightpath angle of the transition stage of tailsitter aircraft,and compared with the linear quadratic regulator(LQR)method based on traditional gain scheduling.Simulation results show that the controller based on the guardian maps theory can autonomously schedule the appropriate control parameters and accomplish the stable transition.Besides,the proposed method shows better tracking performance than the LQR method based on traditional gain scheduling.
