脉冲宽度调制对比例、积分和导数系数特性的影响

T. Suhendra
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引用次数: 0

摘要

基于反馈从传感器获得的价值(异地恋),PID算法使用错误值从对比传感器获得价值和定位点值执行计算,以便PWM发生器将使用连续输出值产生的脉冲(信号)转换为电压范围从0到255(0伏特到5伏特),用于根据所需的LED灯灯打开水平。PID控制对每个系数产生的输出特性可以作为基准,确定比例系数、积分系数和导数系数整体的正确系数值。从试验结果可以看出,可以根据系统所含差异或误差的大小进行系数值调整。如果误差差别很小,则使用较大的系数值,特别是导数系数。它有助于系统达到稳定状态,减少超调。尽管如此,如果误差值很大,那么应用相当大的效率值将使系统达到稳定状态,稳定变得有点棘手,因为有可能超调PID输出。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of Pulse Width Modulation on Proportional, Integral, and Derivative Coefficient Characteristics
Based on the value of feedback obtained from the sensor (LDR), the PID algorithm uses the error value obtained from the comparison between the sensor value and the setpoint value to perform calculations so that the PWM generator will use the output value to produce a row of pulses that will be converted to a voltage (signal) with a range of  0 to 255 (0 volt to 5 volt)  and is used to turn on the LED lamp according to the desired light level. The output characteristics generated by the PID control for each coefficient can be used as a benchmark to determine the correct coefficient value for Propotional coefficient, Integral coefficient and Derivative coefficient  as a whole. From the test results, it can be seen that the coefficient value adjustment can be taken based on the size of the difference or error contained in the system. If the difference in error is slight, the use of large coefficient values, especially in derivative coefficients. It helps the system achieve a stable condition and reduces overshoot. Still, if the error value is significant, then applying a considerable efficiency value will make the system achieve stable condition stable becomes a little tricky because it is possible to overshoot the PID output.
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