燃料电池发动机空气系统改进内模解耦控制策略  

Improved Internal Model Decoupling Control Strategy for Air System of Heavy Truck Fuel Cell Engine

作　　者：孙田 陈光 景帅帅 SUN Tian;CHEN Guang;JING Shuaishuai

机构地区：[1]中国汽车技术研究中心有限公司

出　　处：《汽车工程师》2021年第6期25-28,49,共5页Automotive Engineer

摘　　要：为满足整车动力需求,需要充足的气体供应参加燃料电池电化学反应以保证燃料电池发动机具有良好的输出特性。在空气供应系统中,空气流量和压强具有强耦合的特点,因此文章提出基于改进型Butterworth滤波器的内模解耦控制策略,实现对空气系统的动态解耦。基于试验台架采集的数据建立燃料电池发动机空气供应系统数学模型,采用仿真探究改进型Butterworth滤波器各参数变化对FCE空气系统控制效果的影响规律。根据规律选取滤波器参数对FCE空气系统内模解耦控制策略进行优化。仿真结果表明,基于改进型Butterworth滤波器的内模解耦控制策略能够对该耦合系统实现解耦控制,与传统内模解耦控制策略相比具有调节时间短、波动小的优点,控制效果理想。In order to meet the vehicle power demand,sufficient gas supply is needed to participate in the fuel cell electrochemical reaction to ensure that the fuel cell engine has good output characteristics.In the air supply system,the air flow and pressure have strong coupling characteristics,so this paper proposes an internal model decoupling control strategy based on the improved Butterworth filter to realize the dynamic decoupling of the air system.Based on the data collected from the test bench,the mathematical model of the air supply system of fuel cell engine is established,and the influence of the parameters of the improved Butterworth filter on the control effect of FCE air system is explored by simulation.According to the law,the filter parameters are selected to optimize the internal model decoupling control strategy of FCE air system.The simulation results show that the internal model decoupling control strategy based on the improved Butterworth filter can realize decoupling control of the coupled system.Compared with the traditional internal model decoupling control strategy,it has the advantages of short regulation time,small fluctuation and ideal control effect.

关 键 词：燃料电池发动机 参数辨识 内模解耦 BUTTERWORTH滤波器 控制策略 

分 类 号：U469.722[机械工程—车辆工程]