Simulation modeling method of electro-hydraulic servo valve based on Modelica language

Abstract

The invention relates to the technical field of electro-hydraulic servo valve simulation systems, in particular to a simulation modeling method of electro-hydraulic servo valve based on a Modelica language, which includes the following steps: 1, system disassembly; 2, component level modeling; 3, subsystem level modeling; 4, system level modeling; 5, simulation control; and 6, simulation result demonstration. The simulation modeling method of the electro-hydraulic servo valve based on the Modelica language utilizes multi-territoriality, non-causality and object orientation of the Modelica language to perform secondary development, an obtained electro-hydraulic servo valve simulation model can faithfully reflect operating conditions and characteristics of the electro-hydraulic servo valve and substitute a electro-hydraulic servo system to conduct further system analysis and design, and the simulation modeling method can provide excellent analysis tools and analysis approaches for servo researching and working personnel.

Description

[technical field] [0001] The invention relates to the technical field of an electro-hydraulic servo valve simulation system, in particular to an electro-hydraulic servo valve simulation modeling method based on Modelica language. [Background technique] [0002] In actual production practice, construction machinery such as concrete pump trucks and truck cranes need to achieve certain control accuracy and dynamic performance, while the traditional hydraulic system lacks process control of hydraulic actuators, so it cannot achieve high control accuracy with excellent dynamic performance. Therefore, it is very necessary to introduce electro-hydraulic components that can realize process control in the existing hydraulic system to achieve higher control accuracy and better dynamic performance. The control method using electro-hydraulic components for process control, that is, electro-hydraulic servo components, is called electro-hydraulic servo control. As a branch of servo contr...

AI Technical Summary

Problems solved by technology

However, there are certain deficiencies in using the causal control block diagram modeling method, for example, the working principle and mathematical model of the electro-hydraulic servo valve cannot be reflected from the underlying components, and the calculation causality of each physical quantity needs to be considered when establishing the block diagram, which is not easy to modify The basic components cannot be reused in the modeling of different electro-hydraulic servo valves, and the control block diagram model of the servo valve is not easy to substitute into the overall hydraulic servo system for analysis, etc.

[0006] Therefore, the traditional electro-hydraulic servo valve has the following defects: the analysis method cannot reflect the working principle and mathematical model of the electro-hydraulic servo valve starting from the underlying components, and the calculation causality of various physical quantities needs to be considered when establishing the block diagram, and it is not easy to modify and replace components. The basic components cannot be reused in the modeling of different electro-hydraulic servo valves, and the control block diagram model of the servo valve is not easy to be substituted into the overall hydraulic servo system for analysis

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