NOVEL BUMP-LESS TRANSFER TERM FOR PROPORTIONAL ACTION CONTROLLERS THAT ESCHEW THE INTEGRAL ACTION TERM

摘要

In automatic control systems the Integral action term is used primarily to prevent any continued deviation from the set-point, and concomitantly to secure a bump-less transfer from manual to automatic control. However, there are serious set-backs when using this term. Hence, unless the control system is required to maintain a process at the set-point, it is preferable not to have this term merely to secure a bump-less transfer from manual to automatic control. The present invention is a novel method of securing a bump-less transfer for proportional action controllers that prefer not to have the integral action term when the system is on continuous control. The method used calls for an additional term, which I have called as the Bump-less Transfer 'BT(t)' term, to be included in the control algorithm. This term lasts for only a brief period, merely to secure the bump-less transfer from manual to automatic control.