电辅助涡轮增压柴油机进气氧气质量分数的主动抗扰控制

Active disturbance rejection control of e-Turbo diesel engine intake oxygen concentration

为提高电辅助涡轮增压柴油机对进气氧气质量分数控制的响应速度,设计了一种主动抗扰控制算法。建立了面向控制的进排气氧气质量分数观测算法,作为虚拟氧传感器使用。利用GT-Power柴油机模型,对控制算法进行仿真测试。进行了台架实验平台的测试。结果表明:在目标进气氧气质量分数仿真变化中,相较于传统比例-积分-微分(PID)控制,该主动抗扰控制算法的平均响应时间降低了0.86 s;在发动机瞬态实验中,进气氧气质量分数控制响应迅速,与目标值的最大相对误差为2.33%。因而,该主动抗扰控制算法,可获得柴油机进气氧气质量分数的快速响应。

An active disturbance rejection control algorithm was designed to have a better control ability with faster response speed to intake oxygen concentration of electrically-assisted-turbocharger(e-Turbo)diesel engine.An observer of intake and exhaust oxygen concentration for control was established being used as a virtual oxygen sensor.The control algorithm was tested and evaluated on a precisely calibrated GT-Power diesel engine model.The results show that the average response time decreases by 0.86 s comparing with traditional proportion-integral-differential(PID)control during the changes of the target intake oxygen concentration in the simulation.The maximum relative error to the target is 2.33%during the transient process at engine tests.Therefore,the active disturbance rejection control algorithm achieves a rapid control of intake oxygen concentration.