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Control method of multivariable input eha system based on model predictive control

A model predictive control, multi-variable technology, applied in the field of hydraulic system control, can solve the problems of high requirements for controller design and implementation, nonlinear coupling of control input, linear control algorithm control, etc., to improve EHA frequency response and energy. Efficiency effect

Inactive Publication Date: 2019-12-06
BEIJING JIAOTONG UNIV
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Problems solved by technology

However, due to the increase of the control input, the multi-variable input EHA system becomes an overdriven system, and there is a nonlinear coupling problem between the control inputs, which cannot be controlled by the traditional linear control algorithm, which has a high impact on the design and implementation of the controller. Require

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  • Control method of multivariable input eha system based on model predictive control
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  • Control method of multivariable input eha system based on model predictive control

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Embodiment Construction

[0050] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0051] Those skilled in the art will understand that unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the word "comprising" used in the description of the present invention refers to the presence of said features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, Integers, steps, operations, elements, components, and / or groups thereof. It will be understoo...

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Abstract

The present invention provides a method for controlling a multivariable input EHA system based on model prediction control. The method comprises a step of defining state variables of the multivariable input EHA system, and establishing a state variable equation model of the multivariable input EHA system, a step of carrying out model prediction control on the state variable equation model, establishing a target function of the model prediction control, solving the optimal solution of the target function through rolling optimization, and obtaining virtual input of the multivariable input EHA system, and a step of carrying out control distribution on the real input amount of the multivariable input EHA system by using the virtual input of the multivariable input EHA system. The method provided by the invention can be used for the input control of the multivariable input EHA system, a nonlinear decoupling control problem in the multivariable input EHA system is effectively solved, thus a research foundation is provided for multivariable input EHA system control, and a development direction correspondingly is provided for the further improvement of working efficiency and frequency of the multivariable input EHA system.

Description

technical field [0001] The invention relates to the technical field of hydraulic system control, in particular to a control method for a multi-variable input EHA system based on model predictive control. Background technique [0002] The traditional hydraulic system needs to be equipped with a hydraulic energy station, which is not as convenient as electric energy, and because the hydraulic oil is viscous, the transmission loss is large, so it is not suitable for long-distance transmission. Traditional hydraulic jacking systems usually use valve-controlled hydraulic cylinders, which have high control precision and fast response, but there are serious throttling losses and energy consumption is particularly large. [0003] EHA (Electro-Hydrostatic Actuator) is a typical representative of power transmission. The integrated design is adopted, because the power transmission is adopted instead of the centralized hydraulic control system, that is, only cables are connected to eac...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 董立静谭启凡延皓冯利军竺超今
Owner BEIJING JIAOTONG UNIV
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