科爾摩根 R43HENA-R2-NS-VS-00 伺服電機

生產工藝在過去進入工業時代以后，已經逐步成熟起來了，到現在我們去改變一個工藝是很難的，因為能改變的我們基本都改變了，就是說工藝上對控制系統的處理速度很難有大的變化。對于用戶最關心的工藝流程的效率或者精細度提升而言，其實從兩方面可以去優化它，一個是它的整個的生產流程管理、整個的物料這方面的精細化管理。另一個就是對設備的精細化管理。

但是在這一塊來看，其實我們設備在過去20年上一代高端控制器的能力控制下，它的處理速度是沒有任何問題的，可以完全滿足工藝需求的，更快的控制系統對于改善和提升工廠的運營收益已經很難體現價值了。就像在高速公路上跑，你跑到500邁沒有意義，因為對于穩定可靠性來說，我們制造一個車能跑到200多邁就達到期望了，就夠用了，你再快的速度也用不上，反而帶來潛在危害。在這種情況下，我們一味的再去像過去的時候，去追求比一個高端處理器多快，這個已經沒有意義了。但有一點跟以前一樣，它的穩定可靠性，就像我為什么要開轎車，不去騎摩托車呢？它畢竟安全可靠性要好。

高端控制器現在來看，不是說看能帶多少點，處理速度快到什么程度，因為這些發展到上一代的時候已經不是事了，現在隨便拿一個中小型控制器，說帶點能力和處理速度達到大型控制器的水平也都沒太大差距。但是核心的東西就是它的安全性、穩定可靠性，它的系統的通訊能力，因為過去大型PLC主要是做大系統，大系統一定是有相互之間通訊，有協同的管理能力，與上位機通訊的能力、支持能力，這些能力都是判斷這個系統是高端控制系統，還是中小型控制系統。

The following subsections will explore illustrative examples to make both the problem and the solution(s) b.

A common area of confusion among students first approaching this topic is deciding where to place the dynamic compensation function in a feedforward control system. The answer to this question is surprisingly simple, although it may seem elusive at first glance. The key is found in the following principle: the only time-dynamic we have the ability to alter with our control system is the dynamic of the final control element. We cannot alter the time-dynamic of the load’s effect on the process variable, as that is strictly a function of process physics. 

Therefore, when we test a process employing feedforward control with an eye toward incorporating dynamic compensation, we must measure the time lag of the load’s effect on PV and also the time lag of our final control element’s effect on PV, then compare those two time lags. If the final control element’s time lag is shorter (quicker) than the load’s, then we must add a delay or lag to the feedforward signal so that the final control element’s preemptive b does not occur too soon. If the final control element’s time lag is longer (slower) than the load’s, then we must either find a way to alter the process itself to decrease the load’s time lag, or add a “lead” function to the feedforward signal in order to advance the final control element’s response and thereby ensure the preemptive b does not occur too late. Remember, all we can do with dynamic compensation is alter how the final control element responds (i.e. how slowly or quickly the preemptive b of feedforward occurs). The load’s effect on the process variable is fixed by the physics of the process and therefore lies beyond our direct control.

TRICON 20064-320
TRICON 2058
TRICON 2551
TRICON 2658
TRICON 3003
TRICON 3006
TRICON 3501E
TRICON 3502E
TRICON 3601E
TRICON 3604E
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TRICON 3607E
TRICON 3624
TRICON 3636R
TRICON 3700
TRICON 3700A
TRICON 3701
TRICON 4000056-006
TRICON 4000093-310
TRICON 4000093-310
TRICON 4000094-310
TRICON 4000103-510
TRICON 4000103-510
TRICON 4000163-510
TRICON 4000164-520
TRICON 4101