原文：
             一个控制回路所用调节器的正反作用，是自控专业人员的常识，本无什么新鲜内容。但Fisher—Rosemount公司的PROV()XDCS产品所使用的这一概念与众不同。必须清楚它的不同之处，才可能在该DCS上组成正确的控制回路。这一概念的核心是引入了一个IVP(Implied Valve Position)即暗示阀位的概念。用这个。IVP的概念，取代了传统的调节器输出信号的概念，进而其调节器正反作用的概念有所不同。旋塞阀这个IVP的意义永远代表本调节器输出信号所指挥的调节阀的开度值，但它又不是调节阀真实阀位变送器所测得的阀开度，而是本调节器输出信号送到调节阀后，该阀应有的开度值。因此，它称之为暗示的(Implied)阀位。

　　搞清楚这个IVP的概念，调节器正反作用的新概念就不难理解了。这个正作用，就是当调节器的偏差(测量为正，设定为负)增加时，平衡阀要求本调节器所指挥的调节阀开度也增加；反之，当调节器的偏差增加时，而要求本调节器所指挥的调节阀开度减小，则为反作用。由这个定义来看，这个概念比原来传统概念思路简单而清晰多了。确定控制回路中调节器的正反作用很方便、快捷。

　　这个概念的突出特点，就是在确定回路中调节器正反作用时，呼吸阀把所用调节阀的“增加开”(FC，习惯称气开式)和“增加关”(FO，习惯称气关式)的性能给抛开了，从而使其思路简单了。当然，在实际控制过程中，这个调节阀的FC与FO性能是不允许抛开的，它只是将一个复杂的问题分解为两个简单的问题来处理。这里，把调节阀的FC与FO性能作为调节器本身的一个参数来处理，即在调节器组态时，必须填入该调节器所指挥的调节阀是“增加开”还是“增加关”(FC或FO型)的内容。调节器得知了这个FC或FO信息后，就对信号在内部进行了处理——对FO则反向，对FC不反向。疏水阀这样保证了送去调节阀指挥信号的正确性，也保证了操作员在屏幕上看到的调节器的IVP信号永远代表它所指挥的调节阀应有的开度——100 9，6阀全开，O%阀全关。使操作员不必牢记每个调节阀的FC与FO，使自控人员由控制回路的构成就可很方便地确定调节器的正反作用。

　　这种概念，对于只指挥一个调节阀(或输出信号只送到一个后继单元——调节器、辅助单元等)的控制系统的优点是显然的；而对于一个调节器指挥一个以上的调节阀时，可能带来一些麻烦，会发生两个(几个)调节阀的FC或FO不一致，柱塞阀 或两个(几个)阀对调节器的正反作用要求不一致等等问题。对于类似问题，第1必须保证控制功能的正确无误；第2对调节阀的FC与FO和调节器的正反作用，要依据控制回路的特点、操作员的操作习惯，以其中一个调节阀为准，填入调节器组态中的正反作用和调节阀的FC与FO内容。而对其他调节阀，虽然在调节器组态中不能满足FC与FO和正反作用的配套，但必须用其他方法满足其控制功能的正确性。PROVOX系统是有许多功能可以达到这一要求的。若难度较大时，还可以通过I.CP点的FST编程功能来实现。

“ PROVOX regulator valve positive and negative effects ”是由中国调节阀网提供的国际阀门新闻，译文仅供参考。另外，中国调节阀网还提供相关产品搜索： 手动调节阀、 核用调节阀、 智能调节阀、 自动调节阀、 调节阀价格等。

译文：
       A control loop regulator used in the positive and negative effects, is controlled professional knowledge, there is nothing new on this. However, Fisher-Rosemount company PROV () XDCS product concept used in different. It must be clear differences, it may be formed on the right of the DCS control loop. The core concept is the introduction of an IVP (Implied Valve Position) implies that the concept of valve position. Use this. IVP concept, replacing the traditional concept of regulator outputHydraulic control valves signal, and then the positive and negative regulator role of the concept is different. The IVP's permanent representative to the meaning of the output signal of the regulator valve by the command of the opening value, but it is not true valve control valve position transmitter the measured valve opening, but the regulator output signal sent to the After the control valve, the valve opening should value. Therefore, it is called implied (Implied) valve position. Clear concept of the IVP, the role of positive and negative regulator not difficult to understand new concepts.Water Control valves This positive effect is that when the regulator deviation (a measure of positive, negative set) increases, the demands of the regulator valve by opening the command has also increased; the other hand, when the regulator's bias increases, which require the The command regulator valve opening decreases, was counterproductive. From this definition, the concept of the traditional than the original concept of simple and clear thinking more. Regulator control loop to determine the positive and negative effects is very easy and fast. The concept of salient features is to determine loop regulator positive and negative role, to the use of controlForged Steel Valves valve of the "increase open" (FC, used to refer to gas open) and "increase the Customs" (FO, used to refer to gas off ceremony) performance to set aside, and making it simple ideas. Of course, the actual control process, this FC and FO control valve performance is not allowed to put aside, and it is a complex problem into two simple problems to deal with. Here, the control valve performance FC and FO regulator itself as a parameter to deal with that configuration in the controller, you must enter the command of the regulator valve is "to increase open" or Cast Steel "increase the Customs" ( FC or FO-based) content. Regulator that this FC or FO information, on the signal processing carried out in-house - on the FO is the reverse, on the FC does not reverse. This guarantees that the control valve command signal sent to the correctness, but also to ensure the operator can see on the screen regulator of IVP's permanent representative to the signal that it should command the control valve opening - 100 9.6 All valves Open, O% valve is fully closed. So that operators do not have to remember that each control valve FC and FO, so that controlled the composition of staff by the control loop can be easily identified positive and negative role of regulator. This concept, the only command of a control valve (or output signal is only sent to a subsequent unit - regulator, auxiliary units, etc.) of the control system of advantage is obvious; however, to a regulator valve command when more than one may bring some trouble Other pumpsoccurs two (several) control valve FC or FO inconsistent, or two (several) valve on the regulator's positive and negative role requires consistent and so on. For similar problems, the first one must ensure that control functions are correct; No. 2 FC control valve and regulator with the FO's positive and negative effects, to control loop based on the characteristics of operators operate, subject to one of the valves , fill in the configuration of the positive and negative regulator role and control valve FC and FO content. The other control valve, although the regulator configuration can not satisfy the role of FC and FO and supporting positive and negative, but must be other ways to meet the correctness of its control. PROVOX system has many features to meet this requirement. If difficult, you can also point by I. CP FST programming capabilities to achieve.

原文来源：http://www.1tiaojiefa.com/

2010-08-23 08:44

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