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Construction method of control system of intelligent valve electric actuating mechanism

An electric actuator and control system technology, applied in the field of valve control, can solve problems such as cumbersome methods, and achieve the effects of improving model accuracy and parameter robustness, simple structure, and improving positioning accuracy and control sensitivity.

Pending Publication Date: 2022-04-08
NANJING UNIV OF SCI & TECH
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  • Description
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Problems solved by technology

However, this method is very cumbersome and often requires repeated tuning of the inner and outer loop controllers.

Method used

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  • Construction method of control system of intelligent valve electric actuating mechanism
  • Construction method of control system of intelligent valve electric actuating mechanism
  • Construction method of control system of intelligent valve electric actuating mechanism

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Embodiment

[0068] combine figure 1 , the control system construction method of the intelligent valve electric actuator of the present invention comprises the following steps:

[0069] Step 1. Establish a three-loop control system based on current loop, speed loop and position loop;

[0070] Step 2. Adopt the model predictive current control algorithm, and use the model predictive current control single-loop current controller to replace the current inner loop of the traditional vector control, which can not only achieve the purpose of separately controlling the motor flux and torque, but also control the current Control with a simpler control structure;

[0071] Further, the establishment of the three-loop control system based on the current loop, the speed loop and the position loop described in step 1 is as follows:

[0072] Step 1.1. Use the current loop as the innermost loop of the control system, and use the model predictive current control single-loop current controller to replac...

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Abstract

The invention discloses a construction method of a control system of an intelligent valve electric actuating mechanism. The method comprises the steps that a three-ring control system based on a current ring, a rotating speed ring and a position ring is established, model prediction current control serves as an inner ring of the control system, the rotating speed ring and the position ring serve as outer rings of the control system, and the position ring is the outermost ring; a model predictive current control single-loop current controller is adopted to replace two current inner loops and a voltage modulation link of traditional vector control, and the structure can give full play to the advantages of multiple control targets, multiple variables, multiple constraints and the like of MPC so as to achieve the purpose of respective control of motor torque, flux linkage and current; meanwhile, the control structure does not need a PI regulator, does not need a voltage modulation link, and is simple. The control structure of the intelligent valve electric actuating mechanism is simplified, and the positioning precision, the control sensitivity and the dynamic stability of the intelligent valve electric actuating mechanism are improved.

Description

technical field [0001] The invention relates to the technical field of valve control, in particular to a method for constructing a control system of an electric actuator for an intelligent valve. Background technique [0002] The level of industrial automation technology is increasing day by day. Valves are essential equipment in fluid pipe network control systems and are widely used in petroleum, chemical, electric power, metallurgy, nuclear industries and other industries. As an important device for valve automation control, the performance of the actuator will directly affect the performance of the regulating valve and the control system, so the actuator has become a very important research focus in the field of industrial control. Intelligent valve control can greatly facilitate management and its control accuracy is much higher than manual control. The electric actuator is a product that realizes intelligent control of the valve. In the current development, the electric...

Claims

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Application Information

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IPC IPC(8): F16K31/04H02P21/14H02P21/18H02P21/22
CPCY02P20/10
Inventor 胡文斌罗淏天袁逸凡柳慧洁石锐
Owner NANJING UNIV OF SCI & TECH
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