Alarm method based on function safety threshold of numerical control system

A numerical control system and functional safety technology, applied in general control systems, control/regulation systems, program control, etc., can solve the problems of high real-time response speed, high cost, and large number of control signals for state judgment, saving design and development cost, effectiveness of improving effectiveness, ensuring integrity and consistency

Inactive Publication Date: 2018-05-25
SHENYANG CALCULATION TECH INST CHINESE ACAD OF SCI
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Problems solved by technology

At the same time, there are a large number of safety state detection signals during the operation of the machine tool and the CNC system, and at the same time include hardware signals from the servo motor overload alarm on the machine tool, machine tool limit switch, oil pressure alarm, air pressure alarm and other auxiliary systems, as well as the CNC device. Software signals such as soft limit and out-of-tolerance in the program control process require a

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  • Alarm method based on function safety threshold of numerical control system
  • Alarm method based on function safety threshold of numerical control system
  • Alarm method based on function safety threshold of numerical control system

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[0046] The present invention will be further described in detail below in conjunction with the embodiments.

[0047] The invention relates to the field of numerical control system functional safety, in particular to a numerical control system functional safety threshold calculation device. The invention establishes a numerical control system architecture based on component technology. The system functional safety threshold index is assigned to the functional components, and the system practicability is the objective function, and the functional component reliability and cost function are the constraints. The relative weights of the elements of each layer of the CNC system architecture are calculated by the analytic hierarchy process, and the allocation index of each component is obtained through the cultural algorithm. By adopting the method of the invention, while ensuring that the functional safety threshold index of the numerical control system meets the requirements, the ...

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Abstract

The invention relates to an alarm method based on a function safety threshold of a numerical control system. The method comprises the following steps that the structure of the numerical control systemis divided into multiple layers; a numerical control system safety threshold of each layer is calculated; and alarm is raised when a feedback signal of the numerical control system exceeds the safetythreshold. According to the invention, function safety threshold indexes are distributed on the basis of software structures of the numerical control system, it is ensured that the system is completeand consistent, and the relative weights of elements are distributed reasonably. Thus, an distribution method is more effectively, and basis is provided for system feasibility.

Description

technical field [0001] The invention relates to the field of functional safety of a numerical control system, in particular to a method for alarming according to calculation of a functional safety threshold of a numerical control system. Background technique [0002] Numerical control technology is the core of advanced manufacturing technology and the basis for manufacturing automation, networking, flexibility and integration. As the control center of various CNC machine tools, the CNC device is called the soul and brain of the machine tool. If it breaks down and fails, it will directly lead to abnormal actions of machine tool processing, resulting in damage to machine tool components or workpieces, and even casualties. Therefore, the functional safety of numerical control devices is a hot research direction of key technologies in the field of numerical control. At present, the numerical control device mainly adopts the control system structure based on the microprocessor,...

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Application Information

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IPC IPC(8): G05B19/406
CPCG05B19/406G05B2219/31439
Inventor 尹震宇杨东升马跃谷艾李明时邢健孙昂
Owner SHENYANG CALCULATION TECH INST CHINESE ACAD OF SCI
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