140CPS11420 控制技术

Description

140CPS11420 控制技术

140CPS11420模块
控制技术
DCS在控制上的大特点是依靠各种控制、运算模块的灵活组态，可实现多样化的控制策略以满足不同情况下的需要使得在单元组合仪表实现起来相当繁琐与复杂的命题变得简单，随着企业提出的高柔性、益的要求，以经典控制理论为基础的控制方案已经不能适应，以多变量预测控制为代表的控制策略的提出和成功应用之后，过程控制受到了过程工业界的普遍关注。需要强调的是，广泛应用各种控制与优化技术是挖掘并提升DCS综合性能有效、直接、也是具价值的发展方向。
140CPS11420模块

坐标
触摸屏是坐标系统，要选哪就直接点那，与鼠标这类相对定位系统的本质区别是一次到位的直观性，坐标系的特点是每一次定位坐标与上一次定位坐标没有关系，触摸屏在物理上是一套立的坐标定位系统，每次触摸的数据通过校准数据转为屏幕上的坐标，这样，就要求触摸屏这套坐标不管在什么情况下，同一点的输出数据是稳定的，如果不稳定那么这触摸屏就不能坐标定位，点不准，这就是触摸屏怕的问题:漂移。技术原理上凡是不能同一点触摸每一次采样数据相同的触摸屏，都有漂移这个问题，目前有漂移现象的只有电容触摸屏。

140CPS11420 控制技术

140CPS11420 module
Control technology
The big feature of DCS in control is that it relies on the flexible configuration of various control and operation modules to achieve a variety of control strategies to meet the needs of different situations, which makes the rather cumbersome and complex propositions realized in the unit combination instrument simple. With the high flexibility and benefit requirements put forward by enterprises, the control scheme based on classical control theory can no longer adapt to it. After the control strategy represented by multivariable predictive control is proposed and successfully applied, process control has been widely concerned by process industry. It should be emphasized that the wide application of various control and optimization technologies is an effective, direct and valuable development direction for mining and improving the comprehensive performance of DCS.
140CPS11420 module

coordinate
The touch screen is a coordinate system, where you want to choose to directly point that, and the essential difference between a relative positioning system such as the mouse is the intuition-in-place, the characteristics of the coordinate system is that each positioning coordinate has no relationship with the last positioning coordinate, the touch screen is physically a set of vertical coordinate positioning system, each touch data is converted to the coordinates on the screen through calibration data, so that, It is required that the set of coordinates of the touch screen in any case, the output data of the same point is stable, if it is unstable, then the touch screen can not coordinate positioning, the point is not correct, which is the problem of the touch screen: drift. In principle, any touch screen that cannot touch the same sampling data at the same point every time has the problem of drift, and at present, only capacitive touch screen has drift phenomenon.