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Fixed priority reliability perception energy consumption optimization method suitable for numerical control system

A technology of numerical control system and optimization method, applied in general control system, control/regulation system, adaptive control and other directions, can solve the problems of high energy consumption, inability to apply fixed priority system, etc., to improve system reliability and save energy. consumption effect

Active Publication Date: 2018-02-23
HUAQIAO UNIVERSITY
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Problems solved by technology

There are few studies that take reliability, real-time performance, and low energy consumption as research goals. The only few studies are mainly applicable to systems using dynamic priority strategies, and cannot be applied to fixed priority systems, and the energy consumption is too high

Method used

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  • Fixed priority reliability perception energy consumption optimization method suitable for numerical control system
  • Fixed priority reliability perception energy consumption optimization method suitable for numerical control system
  • Fixed priority reliability perception energy consumption optimization method suitable for numerical control system

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Embodiment Construction

[0059] see figure 1 As shown, the present invention provides a fixed-priority reliability-aware energy consumption optimization method suitable for numerical control systems, including the following steps:

[0060] Step 101: Before task set scheduling, calculate task T i The uniform speed of execution S U .

[0061] Before the task set is scheduled, the calculation task T i The uniform speed of execution S U , the processing steps are as follows:

[0062] S U =min{S T ,S H}

[0063] where S T is the minimum speed at which resource-constrained periodic task set scheduling is feasible, S H is the feasible speed of the resource-constrained periodic task set scheduled by the monotonic rate strategy; S T Calculated by the following formula:

[0064] S T =LS RT +S NRT

[0065] Among them, LS RT is the minimum speed of a task set with resource requirements, and its value is calculated by the following formula:

[0066]

[0067] Among them, r i is task T i The r...

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Abstract

The invention relates to a fixed priority reliability perception energy consumption optimization method suitable for a numerical control system. The method includes the steps of calculating the unified speed SU of executing a task Ti before task calling; and selecting the task with the largest execution time as a scaling task; calculating the static spare time SSTi of the task Ti by utilizing a double-priority monotonous rate strategy scheduling task, and distributing the SSTi to the scaling task; recovering the dynamic spare time DSTi generated by the task Ti on line; allocating the dynamic spare time to the task with the highest priority of a ready queue; determining the final execution speed Si of the task Ti according to the available spare time condition of the task Ti; determining the state of a processor through a dynamic power consumption management technology. The method can fully utilize the spare time generated by a system, and the energy consumption is saved by 11.51% compared with that of an existing method on the premise of ensuring the reliability of the system.

Description

technical field [0001] The invention relates to low-energy real-time scheduling of resource-limited periodic tasks in the field of real-time systems, and in particular to a method for optimizing energy consumption with fixed priority reliability perception for numerical control systems. Background technique [0002] The CNC system is the core of the equipment manufacturing industry and a national strategic material. With the rapid development of the numerical control system and the increasing number of functions, the requirements for real-time performance, reliability and low energy consumption are getting higher and higher. Therefore, real-time performance, reliability and low energy consumption have become the goals of designing CNC systems. [0003] CNC systems can be divided into periodic tasks, non-periodic tasks, and mixed tasks according to their task types. At present, the research on the numerical control system mainly considers the real-time performance and the r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/02
CPCG05B13/024
Inventor 张忆文
Owner HUAQIAO UNIVERSITY
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