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Time compensation control method of lagged object

A compensation control and time compensation technology, applied in program control, comprehensive factory control, comprehensive factory control, etc., can solve problems such as oscillation and instability, and achieve the effect of enhancing stability, simple structure, preventing shock or even instability

Active Publication Date: 2015-09-23
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the problem that the differential action in the traditional control is prone to oscillation or even instability in the adjustment process, the present invention provides a lagging object time compensation control method

Method used

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  • Time compensation control method of lagged object
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  • Time compensation control method of lagged object

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Embodiment Construction

[0018] The lagging object time compensation control method is applied to a domestic thermal power plant in conjunction with the accompanying drawings, and the lagging object time compensation control method of the present invention is further described.

[0019] The lagging object time compensation control method of the present invention is based on the original actual differential algorithm, using the function code library provided by the DCS configuration software platform to configure and process the signal of the rate of change of the measured parameter to form a compensation control enable signal, compensation Intermediate signals such as the control gain signal and the compensation control reset signal finally form a compensation control output signal that can overcome the shortcomings of the traditional differentiator. The method specifically includes the following steps:

[0020] (1) Formation of compensation control enable signal:

[0021] Such as figure 1 As shown,...

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Abstract

The invention discloses a time compensation control method of a lagged object. On the basis of an original practical differential algorithm, a function code base provided by a DCS configuration software platform is utilized to process the configuration of change rate signals of measured parameters to form intermediate signals including a compensation control enabling signal, a compensation control gain signal and a compensation control reset signal, and finally, a compensation control output signal which can overcome defects of a traditional differentiator is formed. According to the characteristic value state of the change rate of a controlled parameter, a control mode is set to a periodic control manner, in each period, compensation control is carried out on part time, so that compensation control matches the lagging characteristic of the controlled object, and the control quality is improved.

Description

technical field [0001] The invention belongs to the technical field of automatic control, and in particular relates to a lagging object time compensation control method. Background technique [0002] In process control applications, the transfer or conversion of signals such as heat takes a certain amount of time, which causes a large lag time in the thermal process. In the lag time stage, the influence of both the control action and the disturbance action on the process variable is unmeasurable, thus resulting in a control system with large inertia and hysteresis characteristics that is difficult to control. For this reason, in traditional industrial process control, differential control is used to improve the dynamic characteristics of the system during the adjustment process. The use of "differential control" can predict the trend of error changes, so that the output of the controller is proportional to the rate of change of the error, which can improve the adjustment qu...

Claims

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Application Information

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IPC IPC(8): G05B19/418
CPCY02P90/02G05B19/4184
Inventor 王月兰唐义军马增益尤海辉严建华倪明江沈跃良颜祝明罗建明岑可法
Owner ZHEJIANG UNIV