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Electro-hydraulic servo controller and construction method thereof, electro-hydraulic servo system and working machine

An electro-hydraulic servo and controller technology, which is applied in the direction of mechanical equipment, fluid pressure actuation system components, fluid pressure actuation devices, etc., can solve the problems of the performance reduction of the controlled object and the inability to meet the performance requirements of the controlled object, and achieve Effect of suppressing excitation oscillations and possible load steps, avoiding undamped oscillations

Active Publication Date: 2021-12-31
SANY HEAVY MACHINERY
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  • Claims
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Problems solved by technology

[0004] However, when the controlled object has parameter uncertainties and load disturbances, if the classical linear control method is used to schedule with a fixed gain value, it will not be able to meet the performance requirements of the controlled object, resulting in a greatly reduced performance of the controlled object

Method used

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  • Electro-hydraulic servo controller and construction method thereof, electro-hydraulic servo system and working machine
  • Electro-hydraulic servo controller and construction method thereof, electro-hydraulic servo system and working machine
  • Electro-hydraulic servo controller and construction method thereof, electro-hydraulic servo system and working machine

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Embodiment Construction

[0057] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are part of the embodiments of the present invention , but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0058] Due to the unknown viscous damping and load stiffness of the electro-hydraulic servo system itself, the change of the pump flow volume characteristics, the nonlinear characteristics of the servo valve, the asymmetrical zero position, the dead zone, the hysteresis and other characteristics, the changes in the volume elastic modulus parameters of the hydraulic oil, Changes in oil te...

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Abstract

The invention provides an electro-hydraulic servo controller and a construction method thereof, an electro-hydraulic servo system and an operation machine. The electro-hydraulic servo controller comprises an integration unit and an anti-saturation unit. Through the integration unit, the steady-state error of the electro-hydraulic servo controller can be eliminated, reference tracking can be ensured, excitation oscillation and possible load step can be actively inhibited, and the phenomenon that undamped oscillation cannot be eliminated by the integration unit can be avoided. Through the anti-saturation unit, anti-saturation protection of the integration unit can be realized. Through the electro-hydraulic servo controller, the control on a hydraulic actuating mechanism can be more accurately realized, and the performance of the hydraulic actuating mechanism can be greatly improved.

Description

technical field [0001] The invention relates to the technical field of mechanical control, in particular to an electro-hydraulic servo controller and a construction method thereof, an electro-hydraulic servo system, and an operating machine. Background technique [0002] Due to the advantages of high power density and strong load capacity, the electro-hydraulic servo system has been widely used in mechatronic systems, such as aircraft wheel-mounted systems, fatigue test devices, load simulators, and exoskeletons. [0003] At present, the commonly used controllers in the electro-hydraulic servo system are mainly based on the classical linear control method to achieve control, that is, the PID algorithm and a variety of model-based control methods based on the inversion of the PID algorithm are used to achieve control. Among them, the classical linear control method does not need to consider the dynamic characteristics of the model, and can directly perform gain scheduling acc...

Claims

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Application Information

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IPC IPC(8): F15B21/02F15B21/00F15B21/08
CPCF15B21/02F15B21/001F15B21/087Y02P90/02
Inventor 高乐徐海军俞宏福
Owner SANY HEAVY MACHINERY
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