Control method of compliant loading in initial load domain of hydraulic loading testing machine

Abstract

The invention discloses a start load domain soft loading control method of a hydraulic loading testing machine. The start load domain soft loading control method comprises a loading start safe displacement point determination method, a start section load region calculation method, a start section region proportional overflow valve typical value calculation method, a start section region proportional flow valve typical value calculation method, a start section displacement-loading force compound control method and a start section-almostlinear loading section soft switching control method. The start load domain soft loading control method solves the problems of start section jumping and step loading in the full-load domain loading process, and meets the requirement on load accurate loading of a laboratory or industrial scientific research production. The start section load soft control method is applied in actual work, soft control over a loading start section is achieved, and the requirements on large-tonnage and precise testing machines of material loadable loading force measuring and other mechanical performance evaluation are met.

Description

technical field [0001] The invention relates to a control method, in particular to a method for controlling compliant loading in the initial load domain of a hydraulic loading testing machine, and belongs to the technical field of intelligent control. Background technique [0002] The load-carrying strength of a material is an important parameter for material performance evaluation and material mechanical testing, and is directly related to the mechanical and structural properties of the material. In the military industry, some functional materials are used not only as high-energy parts of the warhead, but also as supporting structural parts of the weapon system, and their mechanical properties are directly related to the reliability and safety of the weapon system. The existing material mechanical load strength measurement generally uses material testing machines, and the industry generally uses electronic servo material testing machines as the mainstay. The electronic mat...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a compliance control method for the loading initial section of a hydraulically driven loading testing machine, the purpose of which is to solve the problem of abrupt and discontinuous load at the initial loading section, realize continuous initial loading process and controllable speed, and meet the load requirements of materials. Load Measurement Requirements for Compliant Control of Loading Process in Full Load Range

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