Energy-saving and position tracking multi-target control method for lifting hydraulic servo system

A technology of hydraulic servo system and control method, which is applied in fluid pressure actuation system testing, fluid pressure actuation system components, servo motor components, etc. It can solve the problems of large inlet pressure loss, complex controller and system configuration, etc., and achieve Improve system efficiency, realize flow regeneration function, method structure and control algorithm simple effect

Active Publication Date: 2021-05-11
XUZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when a quantitative pump is used, the inlet pressure loss of this type of system is still very large
On the other hand, this system needs to switch at least two valves, and the controller and system configuration are more complicated

Method used

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  • Energy-saving and position tracking multi-target control method for lifting hydraulic servo system
  • Energy-saving and position tracking multi-target control method for lifting hydraulic servo system
  • Energy-saving and position tracking multi-target control method for lifting hydraulic servo system

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Embodiment

[0108] Such as figure 1 As shown, the system structure involved in the method of the present invention includes a proportional throttle valve 1, an electromagnetic reversing valve 2, a displacement sensor 4, and the like. The position tracking is realized by controlling the flow through the proportional throttle valve, and the reversing is realized by switching the electromagnetic directional valve on the one hand, and the flow regeneration function is realized on the other hand. The system structure includes an unloading relief valve / proportional relief valve 3, so as to realize the functions of a safety valve and an unloading valve according to the operating state of the system.

[0109] Such as figure 2 Shown, control method of the present invention comprises:

[0110] Step 1: Establish a multi-model system mathematical model according to the different working principles of the load lifting and load dropping stages.

[0111] Step 2: Organically combine the state observe...

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Abstract

An energy-saving and position tracking multi-target control method for a lifting hydraulic servo system comprises the steps that trajectory tracking is achieved by controlling a proportional throttle valve, and the functions of reversing, unloading, flow regeneration and the like are achieved by controlling an electromagnetic reversing valve and an unloading overflow valve; constructing a hybrid observer by combining a state observer and a disturbance observer so as to obtain an estimated value of a state variable and estimated values of matched and unmatched disturbances; designing a robust controller based on the estimated value obtained in the previous step, and setting control rules of the unloading overflow valve and the electromagnetic reversing valve; and proving the stability of a controller according to a public Lyapunov method, and analyzing the energy-saving performance of the system. Different from a traditional lifting hydraulic servo control method, the control method has the flow regeneration energy-saving function and the position control function at the same time by controlling the proportional throttle valve and switching the electromagnetic reversing valve and the unloading overflow valve, and on the premise that only a position sensor is utilized, the multi-target control of flow regeneration energy-saving and position tracking is effectively realized.

Description

technical field [0001] The invention relates to the technical field of electromechanical hydraulic servo control, in particular to an energy-saving and position tracking multi-target control method for a lifting hydraulic servo system. Background technique [0002] Due to the outstanding advantages of the electro-hydraulic servo system, such as large power-to-weight ratio, fast dynamic response, good controllability of pressure and flow, and flexible transmission of power, it is widely used in aviation, aerospace, automobiles, ships, and engineering machinery. With the development of these fields and the continuous improvement of the technical level, there is an urgent need for a high-performance electro-hydraulic servo system as a support. However, the existing lifting electro-hydraulic servo system often only pays attention to the level of tracking accuracy, while ignoring its energy consumption efficiency, which often results in huge energy waste. [0003] Aiming at the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B19/00F15B21/02F15B21/14F15B13/02
CPCF15B19/007F15B21/02F15B21/14F15B13/02
Inventor 王伟平杜文芳李倩高仕恒袁亚鹏
Owner XUZHOU NORMAL UNIVERSITY
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