NOUS控制和PID控制的直流降压变压器控制性能对比

为了寻求更加优化的直流降压变压器控制系统，搭建了一台直流降压变压器并根据其参数建模，在此基础上分别设计了一种基于NOUS算法的状态空间控制系统、使用观测器的NOUS算法控制系统和PID控制系统。用示波器展示变压器在这3种控制系统下的阶跃响应输出和负载发生突变时的瞬态响应，以对比它们的控制性能。结果表明，基于NOUS算法的状态空间控制系统具有更好的瞬态响应和控制精确度，而PID控制系统在鲁棒性方面具有优势，使用观测器的NOUS算法控制系统仍保留了收敛速度快的优点，但会导致控制系统建模中的误差被放大，影响输出结果。

Comparison of control performance between NOUS control and PID control on DC-DC buck converter

In order to seek a more optimal control system, this study built a DC-DC buck converter and conducted the system modelling according to its parameters, based on which three controllers were designed, including a state-space controller with non-overshooting and non-undershooting(NOUS)algorithm, a NOUS controller with observer and a proportional-integral-derivative(PID)controller. The step responses and transient responses of the converter with 3 different control systems when load changes were shown by an oscilloscope, so that their control performances could be compared. The results indicate that the state-space controller based on NOUS algorithm has better transient response and control precision, while PID controller has advantage in robustness. NOUS controller with observer preserves the advantage of fast convergence, but will lead to amplifying the errors in the system modelling and cause worse control results.