PEMFC热管理系统的改进偏差型自抗扰控制

IMPROVED ERROR-BASED ACTIVE DISTURBANCE REJECTION CONTROL FOR THERMAL MANAGEMENT SYSTEM OF PEMFC

该文建立带有循环水泵和散热器的电堆热管理系统动态数学模型,采用冷却水流量跟随电流、风扇控制电堆温度的前馈-反馈复合控制策略。通过提取部分确定性模型信息对一阶偏差型自抗扰控制算法进行改进,以提高热管理系统的温度控制品质。仿真实验结果表明:所提出的改进ADRC控制算法可有效解决PEMFC热管理系统中存在的强耦合、多扰动的控制难题,相较于传统的PI控制算法,闭环控制系统的主要单项性能指标,即超调量下降了43.7%,调节时间缩短了20.2%,总体体现了系统良好的抗干扰性能和鲁棒性能,能达到预期控制效果。

This study introduces a dynamic mathematical model for the thermal management system of the stack,incorporating a circulating water pump and radiator.The control strategy integrates feedforward and feedback mechanisms,focusing on regulating cooling water flow based on current and utilizing a fan to control stack temperature.An innovative approach is applied to enhance the first-order deviation active disturbance rejection control algorithm.This involves extracting deterministic model information to elevate the temperature control precision within the thermal management system.Simulation results demonstrate that the effectiveness of the proposed improved ADRC control algorithm in addressing challenges related to strong coupling and multiple disturbances inherent in PEMFC thermal management systems.Comparative analysis against a conventional proportional-integral control algorithm reveals significant improvements in the closed-loop control system.Specifically,the enhanced ADRC algorithm achieves a 43.7%reduction in overshoot and a 20.2%decrease in adjustment time.These results underscore the system's robustness and anti-interference capabilities,affirming its ability to attain the desired control outcomes.