The influence of the differential time D:the strength of the differential action mainly depends on the size of the differential time.The larger the D,the stronger the differential action,which is just the opposite of the integration time.The stronger the differential action is,the stronger the regulating action is,and the result is that the oscillation becomes more intense and the period becomes shorter and shorter.
PID parameter tuning is not omnipotent,because the control quality of the system is related to the characteristics of the object,the form and size of interference,and the control scheme.Therefore,when the control scheme is not selected properly,how to adjust the PID parameters cannot achieve the expected control effect.
微分时间D的影响:微分作用的强弱主要看微分时问的大小。D越大,微分作用越强,这和积分时间刚好相反。微分作用越强,调节作用越强,其结果使振荡越来越剧烈,周期也越来越短。
PID参数整定并不是万能的,因为系统的控制质量与对象特性、干扰形式和大小、控制方案等都有关系,所以当控制方案选择不当时,PID参数怎样调整,也不能达到预期的控制效果。
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