A PID parameters tuning and optimization method for a turbine engine based on the simplex search method was proposed. Taking time delay of combustion and actuator into account, a simulation model of a PID control syst...A PID parameters tuning and optimization method for a turbine engine based on the simplex search method was proposed. Taking time delay of combustion and actuator into account, a simulation model of a PID control system for a turbine engine was developed. A performance index based on the integral of absolute error （IAE） was given as an objective function of optimization. In order to avoid the sensitivity that resulted from the initial values of the simplex search method, the traditional Ziegler-Nichols method was used to tune PID parameters to obtain the initial values at first, then the simplex search method was applied to optimize PID parameters for the turbine engine. Simulation results indicate that the simplex search method is a reasonable and effective method for PID controller parameters tuning and optimization.展开更多
大容积环境测试舱内温湿度控制系统具有非线性、时变性和耦合性的特点,传统的比例积分微分(Proportion integral differential,PID)控制器参数整定方法不能满足环境测试舱温湿度控制的要求。只有获得PID控制器的最优参数才能实现环境测...大容积环境测试舱内温湿度控制系统具有非线性、时变性和耦合性的特点,传统的比例积分微分(Proportion integral differential,PID)控制器参数整定方法不能满足环境测试舱温湿度控制的要求。只有获得PID控制器的最优参数才能实现环境测试舱温湿度的优化控制。该文提出一种遗传算法(Genetic algorithm,GA)优化PID控制器参数的控制算法—GA-PID。首先通过预估解耦方法对温湿度解耦,然后将目标函数作为控制器的评估值,通过遗传算法的选择、交叉、变异、迭代功能获得PID控制器参数的最优解,以弥补常规PID算法在环境测试舱温湿度控制系统中的不足。通过MATLAB进行了仿真实验,实验结果表明预估解耦可有效地对温湿度进行解耦,提出的GA-PID控制算法可实现快速、准确以及稳定的环境测试舱温湿度控制,具有更好的控制性能。展开更多
文摘A PID parameters tuning and optimization method for a turbine engine based on the simplex search method was proposed. Taking time delay of combustion and actuator into account, a simulation model of a PID control system for a turbine engine was developed. A performance index based on the integral of absolute error （IAE） was given as an objective function of optimization. In order to avoid the sensitivity that resulted from the initial values of the simplex search method, the traditional Ziegler-Nichols method was used to tune PID parameters to obtain the initial values at first, then the simplex search method was applied to optimize PID parameters for the turbine engine. Simulation results indicate that the simplex search method is a reasonable and effective method for PID controller parameters tuning and optimization.
文摘大容积环境测试舱内温湿度控制系统具有非线性、时变性和耦合性的特点,传统的比例积分微分(Proportion integral differential,PID)控制器参数整定方法不能满足环境测试舱温湿度控制的要求。只有获得PID控制器的最优参数才能实现环境测试舱温湿度的优化控制。该文提出一种遗传算法(Genetic algorithm,GA)优化PID控制器参数的控制算法—GA-PID。首先通过预估解耦方法对温湿度解耦,然后将目标函数作为控制器的评估值,通过遗传算法的选择、交叉、变异、迭代功能获得PID控制器参数的最优解,以弥补常规PID算法在环境测试舱温湿度控制系统中的不足。通过MATLAB进行了仿真实验,实验结果表明预估解耦可有效地对温湿度进行解耦,提出的GA-PID控制算法可实现快速、准确以及稳定的环境测试舱温湿度控制,具有更好的控制性能。
