我们知道，PID控制器各参数对系统的影响是；增大开环比例系数 ，一般将加快系统的影响速度，在有静差的情况下则有利于减小静差；但过大的比例系数又会加大系统超调，甚至产生振荡，使系统不稳定。-We know that, PID controller parameters on the system is　increasing the proportion of open-loop coefficients, the general will speed up the system speed, in the case of static error it will help reduce the static error　but the proportion is too large coefficient will increase the system overshoot, even oscillation, allowing the system to instability.