Redundant control system and method for conforming to functional safety of electric actuating mechanism

An electric actuator and functional safety technology, applied in general control systems, control/regulation systems, computer control, etc., can solve the problem of inability to ensure the safety, stability, timely and accurate execution of electric actuators, affecting the normal operation of electric actuators, etc. problems, to achieve the effect of increasing control reliability, avoiding common cause failure, and safe operation

Pending Publication Date: 2022-03-01
CHONGQING CHUANYI AUTOMATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, electric actuators are often controlled by a single loop. When any part of the circuit fails during operation, it will affect the normal operation

Method used

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  • Redundant control system and method for conforming to functional safety of electric actuating mechanism

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0046] like figure 1 As shown, this embodiment provides a redundant control system for complying with the functional safety of electric actuators, including:

[0047] The instruction sending module is used to send control instructions, and the control instructions include valve opening control instructions and valve switch control instructions; the valve switch control instructions are used to control valve fully open, fully close and stop actions. The control command in this embodiment can be sent through the control switch, and can also be sent through the superior control system, for example: through the SIS system (safety instrumented system) to send the valve switch control command, through the DCS system (distributed control system). Sending of opening degree control command.

[0048] The control module is used to control the electric actuator to execute instructions, and the execution instructions include valve opening execution instructions and valve switch execution ...

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Abstract

The invention provides a redundancy control system and method for conforming to the function safety of an electric actuating mechanism, and the system comprises an instruction sending module, a redundancy control module, a redundancy control module and a redundancy control module, the control module is used for controlling the electric actuating mechanism to execute the instruction; the position detection module is used for detecting the opening degree of the valve and feeding back a detection result of the opening degree of the valve to the control module; the receiving module is used for receiving feedback information sent by the control module according to the valve opening degree detection result; the signal input module is used for transmitting the control instruction sent by the instruction sending module to the control module; the signal output module is used for transmitting the feedback information output by the control module to the receiving module; and the output detection module is used for feeding back an output result of the signal output module to the control module. According to the scheme, the control reliability and safety of the electric actuating mechanism can be effectively improved, and reliable and safe operation of the electric actuating mechanism is ensured.

Description

technical field [0001] The invention belongs to the field of control of electric actuators, in particular to a redundant control system and method for meeting the functional safety of electric actuators. Background technique [0002] The electric actuator is the terminal executive device in the industrial process control system. Its main function is to convert the control signal sent by the control system into a corresponding action to achieve the purpose of controlling the position of the shut-off member in the valve or the position of other adjustment mechanisms. It is widely used. Used in electric power, metallurgy, petrochemical, heating, cement, building materials, textile, food and other industries. [0003] At present, electric actuators are often controlled by a single loop. When any part of the circuit fails during operation, it will affect the normal operation of the electric actuator. It cannot guarantee the safe, stable, timely and accurate execution of the corre...

Claims

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Application Information

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IPC IPC(8): G05B19/042
CPCG05B19/0421G05B2219/24182
Inventor 游军冯领罗勇
Owner CHONGQING CHUANYI AUTOMATION
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