柴油机空气系统降秩控制算法的应用范围

发动机空气系统降秩控制算法中，过于苛刻的稳态点选取策略限制了该算法的使用范围，因此需改进稳态点选取策略，改进策略以最大化功率为优化目标。对改进策略所选取的新稳态点进行空气系统特性试验。结果表明，在新稳态点的线性化传递函数是降秩的，仍然适用降秩控制算法。为考察改进策略的控制效果，完成降秩控制器的设计，并通过试验与独立闭环控制进行对比。试验结果显示，瞬态控制过程中降秩控制算法明显优于独立闭环控制，达到了设计目标，说明选取稳态点的改进策略是成功的。

APPLICATON AREA OF RANK ONE CONTROL ALGORITHM TO DIESEL ENGINE AIR SYSTEM

In rank one control algorithm regarding to engine air system control, the stringent condition to choose setpoints limits its use, an improvement strategy is developed, whose optimized target is to maximize power. The characteristic experiment of air path is made on the new setpoints chosen by the improvement strategy. The results show that the rank of the linearization transfer function on the new setpoints is deficient, and rank one control algorithm still can be applied. To survey the control effect of the improvement strategy, the design of rank one controller is completed, and the control effect is com-pared with that of individual closed-loop control by an experiment. The experiment results show that rank one control algorithm obviously surpasses individual closed-loop control during transient phases, and achieves the design objective, which proves that the improvement strategy to choose setpoints is successful.