A16B-2200-0361

A16B-2200-0361 参数整定的质量指标

教科书里说的指标早就忘了，相关规定里面说的指标也没工夫细看。根据我的经验，这几个指标需要重视：

1、衰减率：大约为0.75好。好的自动调节系统，用俗话说“一大一小两个波”好。用数学方法表示出来，就是合适的衰减率。

2、大偏差：一个扰动来临之后，经过调节，系统稳定后，被调量与设定值的大偏差。一个整定好的稳定的调节系统，一般第一个波动大，因为“一大一小两个波”，后面就趋于稳定了。如果不能趋于稳定，也就是说不是稳态，那就谈不上调节质量，也就无所谓大偏差了。

3、波动范围：顾名思义，没必要多说。实际运行中的调节系统，扰动因素是不断存在的，因而被调量是不断波动着的，所以波动范围基本要达到一个区间。

4、执行机构动作次数：动作次数决定了执行机构的寿命。这里说的执行机构不光包括执行器，还包括调节阀门。执行机构频繁动作不光损坏执行器，还会让阀门线性恶化。下一节会更加详细的予以说明。

5、稳定时间：阶跃扰动后，被调量回到稳态所需要的时间。稳定时间决定了系统抑制干扰偶的速度。

A16B-2200-0361 

A16B-2200-0361

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