DCS组态中如何避免超驰控制中的积分饱和? 你看看pd-mr这个功能块是否有用 pd controller block with manual reset (pd-mr) pd controller block with manual reset (pd-mr) performs proportional-derivative (pd) control function. this block may be applied to programmed temperature control process. in programmed temperature control process, operating conditions do not remain the same throughout the process time. for example, a chemical process is accompanied by momentary generations of intense heat. in this case, among all pid actions of the controller block the integral (i) actions may be weakened for a specific period of time during operation so that control is performed only by proportional and derivative (pd) actions. in this type of process, it is necessary to set a wide proportional band, as a long dead time or large process time constant tends to cause hunting if an integral (i) action is performed. by performing only proportional-derivative (pd) actions, the proportional band (p) can be narrowed. in addition, overshooting can be inhibited by shift the control phase by derivative (d) actions to achieve the better control result. 查看更多