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Position-based multi-hydraulic-cylinder coordination control method and device for stably outputting liquid

A coordinated control, multi-hydraulic cylinder technology, used in fluid pressure actuation devices, fluid pressure actuation system components, servo motors, etc., can solve the problems of output flow and pressure pulsation, and achieve small flow and pressure pulsation, reversing The effect of low time requirement and stable output

Active Publication Date: 2020-05-19
XINJIANG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a position-based multi-hydraulic cylinder coordinated control method and device for stably outputting liquid, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the pulsation of output flow and pressure in the existing multi-group hydraulic cylinder control method The problem

Method used

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  • Position-based multi-hydraulic-cylinder coordination control method and device for stably outputting liquid
  • Position-based multi-hydraulic-cylinder coordination control method and device for stably outputting liquid
  • Position-based multi-hydraulic-cylinder coordination control method and device for stably outputting liquid

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: The position-based multi-hydraulic cylinder coordinated control method for stable output of liquid is carried out as follows: before the n groups of hydraulic cylinders work, the strokes of the n groups of hydraulic cylinders are initialized, and the n groups of hydraulic cylinders are respectively in the At the starting point of the stroke, near the end point, (n-m+1) / (n-1) stroke, any group of hydraulic cylinders in the n groups of hydraulic cylinders is recorded as the m-th group of hydraulic cylinders, 1≤m≤n, m, n are natural numbers;

[0029] After the hydraulic cylinder strokes of each group of hydraulic cylinders are initialized, the hydraulic cylinders start to work, the mth group of hydraulic cylinders is in a stop waiting state (at the starting point of the stroke), and the other groups of hydraulic cylinders move normally. When the m+1th group of hydraulic cylinders is about to reach the stroke At the end point, the reversing valve controlling t...

Embodiment 2

[0030] Embodiment 2: As an optimization of the above embodiment, the position-based multi-hydraulic cylinder coordinated control method for the smooth output of liquid is carried out as follows: when n is three, before the three groups of hydraulic cylinders work, the first three groups The piston positions of the hydraulic cylinders are initialized. The initial states of the three groups of hydraulic cylinders are at the starting point, middle point, and end point of the stroke respectively. The piston of any one of the piston cylinders is at the end of the stroke, and the piston of any one of the piston cylinders in group III hydraulic cylinders 19 is at the midpoint of the stroke. Then, the three groups of hydraulic cylinders start to work.

[0031] Group II hydraulic cylinder 18 and Group III hydraulic cylinder 19 move normally, and the piston of any piston cylinder in Group I hydraulic cylinder 17 is in a stop waiting state (starting point of stroke). When the piston of t...

Embodiment 3

[0032] Embodiment 3: As an optimization of the above embodiment, the difference from Embodiment 2 is that the position-based multi-hydraulic cylinder coordinated control method for smooth output of liquid is carried out as follows: when n is four, at four Before the group of hydraulic cylinders work, the piston positions of the four groups of hydraulic cylinders are initialized first. The initial states of the four groups of hydraulic cylinders are at the starting point, end point, 2 / 3 stroke, and 1 / 3 stroke respectively, that is, group I The piston of any piston cylinder in the hydraulic cylinder 17 is at the starting point of the stroke, the piston of any piston cylinder in the group II hydraulic cylinder 18 is at the end of the stroke, and the piston of any piston cylinder in the group III hydraulic cylinder 19 is at the 2 / 3 stroke At the position, the piston of any one of the hydraulic cylinders in the IV group is at 1 / 3 of the stroke, and then the four groups of hydraulic ...

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Abstract

The invention relates to the technical field of multiple sets hydraulic cylinder control, in particular to a position-based multi-hydraulic-cylinder coordination control method and device for stably outputting liquid. Before n sets of hydraulic cylinders work, the positions of pistons of the n sets of hydraulic cylinders are initialized firstly, then the hydraulic cylinders start to work, by detecting the positions of the pistons or piston rods or plungers of one set of hydraulic cylinders, the other set of hydraulic cylinders is controlled to reverse, ordered reversing of the multiple sets ofhydraulic cylinders is achieved, the starting and accelerating process of the mth set of hydraulic cylinders and the decelerating and stopping process of the (m + 1) th set of hydraulic cylinders arecompletely overlapped, and perfect overlapping of the output flow is achieved. According to the method, by detecting the positions of the piston rods or the plungers of one set of hydraulic cylindersand controlling reversing of reversing valves of the other set of hydraulic cylinders, ordered reversing of the multiple sets of hydraulic cylinders is achieved, the output flow is stable, and flow and pressure pulsation are small.

Description

technical field [0001] The invention relates to the technical field of multi-group hydraulic cylinder control, and relates to a location-based multi-hydraulic cylinder coordinated control method and a special device for stably outputting liquid. Background technique [0002] For the control of multiple groups of hydraulic cylinders, the traditional control method is that a group of reversing valves controls a group of hydraulic cylinders, and the reversing process between the cylinder groups is independent of each other and does not interfere with each other. However, when two or more hydraulic cylinders need to move in coordination, due to the inherent reversing time of each hydraulic cylinder assembly, the difference in the opening and closing performance of the valve group, manufacturing errors, oil pipes and water hammer in the cylinder, each hydraulic cylinder The flow output by pushing the plunger cylinder (load) cannot be superimposed perfectly, which makes the output...

Claims

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Application Information

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IPC IPC(8): F15B11/20F15B13/07F15B21/00
CPCF15B11/20F15B13/07F15B21/008F15B2211/8613F15B2211/8616
Inventor 杨波司冰龙
Owner XINJIANG UNIVERSITY
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