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Flexible cable pose simulation method and device based on bending composite mass-spring model

A flexible cable and composite spring technology, which is applied in complex mathematical operations, CAD numerical modeling, special data processing applications, etc., can solve the problems that the reliability of flexible cables is difficult to guarantee, and the simulation effect of flexible cable models is not realistic enough.

Active Publication Date: 2015-12-23
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] The purpose of the present invention is to provide a method and device for simulating the pose of a flexible cable based on a bending-torsion compound spring particle model, so as to solve the problem that the simulation effect of the flexible cable model in the prior art is not realistic enough, which leads to the assembly of the flexible cable in the prior art Difficult to guarantee the reliability of the process

Method used

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  • Flexible cable pose simulation method and device based on bending composite mass-spring model
  • Flexible cable pose simulation method and device based on bending composite mass-spring model
  • Flexible cable pose simulation method and device based on bending composite mass-spring model

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Embodiment 1

[0098] Such as figure 1 As shown, the flexible cable pose simulation method based on the bending-torsion composite spring mass model provided by Embodiment 1 of the present invention includes:

[0099] Step 11: The flexible cable is represented by a combination of multiple discrete particles, and the physical characteristic model of the flexible cable is established. In the physical characteristic model of the flexible cable, the tensile characteristics of the flexible cable are represented by the flexible The linear spring between two adjacent discrete mass points on the cable is described. The bending resistance of the flexible cable is described by a bending spring attached to each of the discrete mass points. The torsion resistance of the flexible cable characterized by torsion springs attached at each cable segment of said flexible cable;

[0100] Step 12: Obtain the initial position of each discrete particle according to the total length of the flexible cable and the nu...

Embodiment 2

[0132] The flexible cable pose simulation method based on the bending-torsion compound spring particle model provided by the second embodiment of the present invention is as follows:

[0133] 1. Establish physical characteristic model - bending-torsion compound spring mass model

[0134] The bending-torsion composite spring mass model of the cable is as follows figure 2 As shown, in this model, the cable is regarded as composed of cable segments connected by many discrete particles, and the physical characteristics of the cable are described by various springs. The mass of each mass point is the same, and the sum of mass is equal to the total mass of the cable; two adjacent mass points are connected by a linear spring, which represents the tensile characteristics of the cable; a bending spring is attached to each mass point, which represents the bending resistance of the cable characteristics; in addition, a torsion spring is added to each cable segment to represent the tors...

Embodiment 3

[0235] Such as Figure 13 As shown, the flexible cable pose simulation device based on the bending-torsion composite spring mass model provided by Embodiment 3 of the present invention includes:

[0236] The establishment module 131 is used to represent the flexible cable by a combination of multiple discrete particles, and establish a physical characteristic model of the flexible cable. In the physical characteristic model of the flexible cable, the tensile characteristics of the flexible cable are represented by The linear spring between two adjacent discrete mass points on the flexible cable is described. The bending resistance of the flexible cable is described by a bending spring attached to each of the discrete mass points. The flexible cable The anti-torsion characteristic of is described by the torsion spring attached to each cable section of the flexible cable;

[0237] The first processing module 132 is configured to process and obtain the initial position of each d...

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Abstract

The invention provides a flexible cable pose simulation method and device based on a bending composite mass-spring model. The method comprises establishing a physical property model of a flexible cable, and describing the anti-torsion characteristic of the flexible cable using distortion springs added to each segment of the flexible cable; obtaining the initial position of each discrete particle according to the overall length of the flexible cable and the number of the segments; determining discrete particles at two ends of the flexible cable as fixed points, and obtaining positional information of the fixed points; calculating stress information of other discrete particles of undetermined positional information of the flexible cable according to the physical property model; sequentially calculating balance positions of other discrete particles using the stress information and the initial positions, to obtain positional information of other discrete particles; and simulating a stable pose of the flexible cable according to the positional information of the fixed points of the flexible cable and the positional information of other discrete particles. The effect of simulation of the flexible cable can be more actual by adopting the flexible cable pose simulation method and device based on the bending composite mass-spring model, the reliability of the flexible cable during assembling can be ensured to some degree.

Description

technical field [0001] The invention relates to the technical field of mechanical engineering, in particular to a flexible cable pose simulation method and device based on a bending-torsion composite spring mass model. Background technique [0002] Cable is a general term for wires and cables used to connect electrical components, electrical equipment or control devices in electromechanical systems of complex products. It plays a very important role as a medium for transmitting electrical energy and signals. The rationality of its layout design and the reliability of assembly Sex will directly affect the performance of the product. In recent years, with the development of CAD technology and virtual reality technology, the assembly simulation of flexible cables in virtual environment has gradually attracted people's attention. Through the assembly simulation of the cable, the assemblability and rationality of the design of the cable can be verified, and the problems that may...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20G06F2111/10G06F2113/16G06F17/11G06F17/16
Inventor 刘检华吕乃静丁晓宇刘少丽刘佳顺林海立马江涛
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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