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A high-precision displacement control hydraulic cylinder system and its control method

A technology of displacement control and control method, which is applied in the field of hydraulic cylinder control, can solve the problems that the displacement sensor cannot meet the high control accuracy and large stroke of the hydraulic cylinder, and achieve the effect of improving the displacement control accuracy, strong versatility, and broadening the application field

Active Publication Date: 2018-02-13
BEIJING INST OF STRUCTURE & ENVIRONMENT ENG +1
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0006] The invention provides a high-precision displacement control hydraulic cylinder system and its control method to solve the problem that the existing displacement sensor cannot meet the requirements of high control precision and large stroke of the hydraulic cylinder

Method used

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  • A high-precision displacement control hydraulic cylinder system and its control method
  • A high-precision displacement control hydraulic cylinder system and its control method
  • A high-precision displacement control hydraulic cylinder system and its control method

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Embodiment 2

[0051] This embodiment provides a control method for the high-precision displacement control hydraulic cylinder system in Embodiment 1, and the specific steps are as follows:

[0052] The S1 controller controls the initial action of the hydraulic cylinder according to the displacement setting value.

[0053] The S2 controller receives the feedback signal of the displacement of the output rod after the action of the hydraulic cylinder collected by the first displacement sensor and the second sensor, and selects the main feedback signal to participate in the closed-loop control according to the feedback value of the feedback signal, and calculates the displacement set value and Error in the primary feedback value of the primary feedback signal.

[0054] The S3 controller controls the action of the hydraulic cylinder again according to the error value.

[0055] S4 Repeat steps S2 and S3 until the output rod of the hydraulic cylinder moves to the set displacement position accurat...

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Abstract

The invention relates to the technical field of hydraulic cylinder control, and discloses a high-precision displacement control hydraulic cylinder system and a control method thereof. The system comprises a controller, a hydraulic cylinder, a first displacement sensor and a second displacement sensor. The first displacement sensor and the second displacement sensor are both used for detecting displacement of an output rod of the hydraulic cylinder, and the measuring range of the first displacement sensor is larger than the measuring range of the second displacement sensor. The controller can receive displacement feedback signals of the first displacement sensor and the second displacement sensor and select a main feedback signal, and can control the hydraulic cylinder to act. The high-precision displacement control hydraulic cylinder system and the control method thereof make the hydraulic cylinder have a large stroke, and can improve the displacement control precision substantially within a small stroke range at the same time; and according to the hydraulic cylinder system, machining is easy to implement, the application fields of the hydraulic cylinder are broadened, the universality is high, and the high-precision displacement control hydraulic cylinder system and the control method thereof can be widely applied to displacement control hydraulic systems such as hydraulic type vibrating tables.

Description

technical field [0001] The invention relates to the technical field of hydraulic cylinder control, in particular to a high-precision displacement control hydraulic cylinder system and a control method thereof. Background technique [0002] The hydraulic cylinder is the actuator of the hydraulic system and is widely used in a variety of hydraulic control systems. It is mainly divided into two types: force control and displacement control. Among them, in the displacement control system, the system sends a displacement command to the hydraulic cylinder, and collects the displacement signal of the hydraulic cylinder to the control system for comparison with the displacement command, and controls the movement of the hydraulic cylinder by controlling the opening of the servo valve or proportional valve, thereby To achieve the purpose of precise action, the displacement acquisition of the hydraulic cylinder is realized through the displacement sensor integrated on the hydraulic cyl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B15/14F15B15/28
CPCF15B15/14F15B15/2815
Inventor 郝岩研窦雪川杨志鹏侯京锋王家乐
Owner BEIJING INST OF STRUCTURE & ENVIRONMENT ENG
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