When setting the PID parameters,it is necessary to strive for stable working conditions,especially the decay curve method to tune the PID,otherwise other disturbances in the process enter the system,and the correct 4:1~10:1 decay ratio and decay period cannot be obtained.Find the best PID parameters.
整定PID参数时，一定要力求工况稳定，尤其是衰减曲线法整定PID，否则工艺中的其他干扰进入系统，就不能得到正确的4:1~10:1衰减比例度和衰减周期，就不能求得最佳PID参数。
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