船用单体泵柴油机控制系统HiL测试与试验验证

以某型电控单体泵柴油机控制系统为例，采用船用柴油机专用的HiL(硬件在环)系统测试同步信号、转速闭环、排温修正策略及极限工况。测试结果显示:冷起动时间2.4 s；额定工况稳态转速波动率0.31%；突加突减负荷时瞬时调速率小于5%，稳定时间小于4 s；各缸排温不平均率维持在5%左右。HiL系统优化后的控制策略在实际配机试验时的应用效果良好，冷起动时间3.6 s；额定工况稳态转速波动率0.67%；负荷突变时瞬时调速率为2.67%，稳定时间为4.9 s，各缸排温不平均率为7.9%。验证结果表明:主要评价指标均满足柴油机整机性能对控制的需求；HiL测试有效提高了控制策略的稳定性和实际配机效率。

HiL Test and Experimental Validation of the Control System of a Marine Diesel Engine with Electronic Unit Pump

The control system for a certain type of diesel engine with electronic unit pump is taken as an example to test synchronizing signals, engine speed feedback, exhaust temperature modified strategy and limiting working condition by marine diesel engine appropriative HiL (Hardware-in-the-Loop) system. The test results show that the cold start of the diesel engine need 2.4 s; under the rating working condition, the speed fluctuation of steady state is as low as 0.31%; the speed governing rate is less than 5% with sudden load increasing or reduction, and the the time needed for getting back to stable condition is less than 4s; the exhaust temperature difference ratio of each cylinders is around 5%. The engine matching test of the control strategy with HiL system boasts good application results:the cold start of the diesel engine need 3.6 s; under the rating working condition, the speed fluctuation of steady state is 0.67%; the speed governing rate is 2.67% with sudden load increasing or reduction, and the the time needed for getting back to stable condition is 4.9 s; the exhaust temperature difference ratio of each cylinders is 7.9%. The verification results show that the main evaluation indexes could meet with the requirement of the whole engine performance, and the HiL system could effectively improve the stability of control strategy and efficiency of engine matching.