【摘要】 以单缸机模拟增压系统为研究对象,通过对单缸机增压压力调节的仿真分析与试验研究,开发了一种由计算机数据采集系统控制的增压压力比例积分微分(PID)调控方法。通过实时的动态控制仿真计算进行有关参数的模拟分析调整,并运用到实际的模拟增压系统上。通过现场控制参数的调整,实现对单缸机增压压力的稳定调控,25%工况间隔对应的进气压力设定时间不大于15s,实际满量程控制精度及波动率小于1%,完全满足单缸机试验对进气压力的调设要求。相对于原来的人工调节,所开发的单缸机增压压力调节方法降低了调节难度、减少了调节时间与压力波动,提高了试验的精度与效率。更多还原

【Abstract】 An improved PID method of inlet pressure regulation cont ro lled by a computer based data acquisition system has been developed through the Research of simulated turbocharging system and correlative emulation for a singl e-cylinder test engine. Some important control parameters can be adjusted and op timized by simulated analysis and test process. Stable inlet pressure regulation of single-cylinder engine can be achieved by on-line adjusting the control para meters . The test results show that this control method makes the inlet pressure setting time less than 15 seconds with a 25% load variation, and the actual c ontrol precision and fluctuation rate are less than 1% FSO. All those can meet the requirement for inlet pressure control in a single-cylinder engine test. Co mpared with the original manual regulation, this method reduces time, difficult y and fluctuation on the inlet pressure regulation, thus increases the engine te st precision and efficiency.更多还原