Closed-loop control failure detection method and system
A closed-loop control and controller technology, applied in general control systems, control/regulation systems, test/monitoring control systems, etc., can solve closed-loop control failures, the controller cannot obtain the operating state data of the state detection sensor, and cannot know the actual execution. equipment and other problems to achieve the effect of preventing accidents
Active Publication Date: 2020-05-19
WUHAN MARINE MACHINERY PLANT
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Problems solved by technology
[0005] When the closed-loop control system fails, it will lead to the failure of the closed-loop control, so that the error between the actual state of the actual actuator and the operation command exceeds the maximum error allowed by the closed-loop control system
For example, when the state detection sensor fails, the controller cannot obtain the operating state data sent by the state detection sensor, so the control device cannot know whether the actual execution device performs the corresponding action, and thus cannot send corresponding control instructions to further control the actual execution device
At the same time, the failure of the closed-loop control system can easily lead to safety accidents, affect the operation of equipment, and even threaten personal safety in severe cases.
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[0053] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0054] The embodiment of the present invention provides a closed-loop control failure detection method, which is used to detect the cause of the closed-loop control failure of the closed-loop control system. The closed-loop control system includes a control device, a controller, an actual execution device, and a state detection device installed on the actual execution device. sensor. The reasons for closed-loop control failure mainly include the following categories:
[0055] Status detection sensor failure: For example, the status detection sensor itself is faulty, the cable is disconnected, etc. The failure of the state detection sensor will cause the closed-loop control system to be unable to accurately obtain or cannot obtain the ...
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The invention discloses a detection method and a system for closed loop control failure, belonging to the technical field of industrial control. The method comprises the following steps of: acquiringrunning state data; acquiring operation instruction data; judging whether a state detection sensor is faulty or not according to the acquired running state data and a first threshold value pre-storedin a controller; judging whether a control device is faulty or not according to the acquired operation instruction data and a second threshold pre-stored in the controller; processing the acquired running state data and the operation instruction data, converting the running state data into a first numerical value, and converting the operation instruction data into a second numerical value, whereinthe numerical ranges of the first numerical value and the second numerical value are consistent, and the data types are the same; acquiring a first difference value of the first numerical value and the second numerical value before a time pulse is set; acquiring a second difference value of the first numerical value and the second numerical value after the time pulse is set; and judging whether an actual executing device is faulty or not according to the first difference value and the second difference value.
Description
technical field [0001] The invention relates to the technical field of industrial control, in particular to a closed-loop control failure detection method and system. Background technique [0002] A closed loop control system is a type of control system. The closed-loop control system includes a manipulation device, a controller, an actual execution device and a state detection sensor installed on the actual execution device. [0003] The control device generates an operation instruction and sends it to the controller, and the operation instruction is used to instruct and control the device under test to reach a set state. The controller detects the operation instruction issued by the control device in real time, and detects the actual state of the actual actuator through the feedback sensor in real time. When there is an error between the operation instruction and the actual state and the error exceeds the maximum error allowed by the closed-loop control system, the contro...
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IPC IPC(8): G05B23/02
CPCG05B23/0213G05B2219/24065
Inventor 赵丽雄池飞飞马志刚肖源
Owner WUHAN MARINE MACHINERY PLANT