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介绍一种基于DSP的发动机控制器实物在回路仿真的扭矩-转速复合信号模拟器,其将扭矩-转速复合信号的一个周期信号分解为包含高-低-高-低4个时间段的2个脉冲,利用DSP的高速定时中断精确控制每个脉冲的高低电平切换时刻;通过对输出信号的精确测量,补偿因中断延迟造成的周期和相位的误差;通过串口中断接收模型计算机输出的扭矩-转速的特征参数,将其存储于定义的一种先进先出缓冲区结构体中,并在定时中断中对特征时间参数进行保护性更新。
This paper introduces a torque-speed compound signal simulator based on DSP in-circuit simulation of engine controller, which decomposes one cycle signal of torque-speed compound signal into two segments including high-low-high-low four time segments Pulse, the use of high-speed DSP interrupt timing precise control of the high and low level of each pulse switching moment; by accurate measurement of the output signal to compensate for the delay caused by the interrupt cycle and phase error; through the serial port interrupt model to receive computer output torque - Speed characteristics of the parameters stored in the definition of a first-in-first-out buffer structure, and in the timing of the interruption of the characteristic time parameters of the protective update.