Software protection method for preventing digital feedback control system from being out of control

A feedback control system and software protection technology, which is applied to the program control and electrical program control in the sequence/logic controller, can solve the problem that the digital feedback control system cannot be effectively prevented from being out of control, and achieve high reliability and software code The effect of small amount and simple protection method

Inactive Publication Date: 2013-03-06
中国兵器工业第二〇六研究所
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Problems solved by technology

The above method cannot effectively prevent the digital feedback control system from running out of control in this case

Method used

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  • Software protection method for preventing digital feedback control system from being out of control

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Embodiment Construction

[0010] The present invention firstly judges whether the digital feedback signal can be received normally within the cycle of the control software; secondly judges the correctness of the received signal, if the feedback signal is abnormal, the system output control signal closes the system output in real time to ensure system security.

[0011] The compiling of anti-runaway software subroutine among the present invention can be according to figure 1 The flowchart of the software implementation is shown.

[0012] The specific implementation process is as follows:

[0013] 1. According to the length of the cycle period of the system control software and the real-time requirements of the system protection, the number of times that the valid digital feedback signal is not received continuously, the deviation threshold value of the adjacent two digital feedback signals, and the allowed two adjacent digital feedback signals in the closed-loop state The number of times that the devi...

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Abstract

The invention provides a software protection method for preventing a digital feedback control system from being out of control, belongs to the technical field of computer control, relates to receiving and processing of a digital feedback signal and discloses a system protection method for a control system based on the digital feedback signal. The method comprises the following steps of: firstly, judging whether the digital feedback signal can be received normally within a control software cycle period; and secondly, judging the correctness of the received signal, outputting a control signal from a system, and closing system output in real time if the feedback signal is abnormal so as to ensure the safety of the system. The system protection method employed in the invention is simple, small in software code quantity, strong in real-time property and high in reliability.

Description

technical field [0001] The invention belongs to the technical field of computer control, relates to the receiving and processing of digital feedback signals, and proposes a software protection method for preventing digital feedback control systems from getting out of control. Background technique [0002] With the rapid development of large-scale integrated circuits, microcontrollers, microprocessors and sensor technologies, the digitization of feedback components in control systems has also been greatly developed. [0003] In the control system using digital feedback signal, if the feedback signal is abnormal due to the failure of the feedback element, the failure of the feedback element, the failure of the communication circuit of the feedback signal, etc., the control system will be out of control. System loss of control will pose a threat to system and personal safety, so in any case, it is necessary to take corresponding measures to prevent digital signal feedback contr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/04
Inventor 曹福禄刘世挺孙向亮张朋年胡卫华
Owner 中国兵器工业第二〇六研究所
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