A topology optimization method for multi-degree-of-freedom compliant parallel mechanisms

A technology of topology optimization and degrees of freedom, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as multi-degree-of-freedom compliant parallel mechanism topology synthesis, etc., to achieve rich topology diversity and simplified topology optimization Problems, the effect of getting rid of dependence

Active Publication Date: 2017-08-25
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

However, the existing topology optimization methods, such as the method disclosed in the patent US20110270587A1, are mainly used to design structures and single-degree-of-freedom planar compliant mechanisms, such as micro-clamps and displacement inverters and other compliant mechanisms with simple movements, and cannot be used for Topological Synthesis of Multi-DOF Compliant Parallel Mechanisms

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  • A topology optimization method for multi-degree-of-freedom compliant parallel mechanisms
  • A topology optimization method for multi-degree-of-freedom compliant parallel mechanisms
  • A topology optimization method for multi-degree-of-freedom compliant parallel mechanisms

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[0025] Hereinafter, the present invention will be further described in detail with reference to the examples and drawings, but the implementation of the present invention is not limited thereto.

[0026] A topology optimization method for a multi-degree-of-freedom compliant parallel mechanism, which specifically includes the following steps:

[0027] Step 1: Divide a fixed design domain, discretize and set boundary conditions for each kinematic chain according to the design problem. Such as figure 1 with figure 2 As shown, the frame 1 and the moving platform 2 are connected by a plurality of fixed design domains 3, which are used to synthesize the corresponding kinematic chains 3; the number of kinematic chains 3 is determined according to the degree of freedom of the mechanism that needs to be designed, generally it is movement The number of chains 3 is equal to the degree of freedom of the mechanism, and each kinematic chain 3 contains only one motion input point a, that is, the...

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Abstract

A topology optimization method for a multi-degree-of-freedom compliant parallel mechanism, comprising steps in the following sequence: set the kinematic chain of the compliant parallel mechanism as the design domain of the topology optimization problem, establish the compliance matrix of each kinematic chain and assemble it into a compliant parallel mechanism According to the stiffness matrix of the mechanism, the stiffness and motion transfer relationship of the input and output points are derived, and a topology optimization model is established to optimize the kinematic chain. The method of the invention can be used to synthesize compliant parallel mechanisms such as 1 to 3 degrees of freedom in plane, 2 to 6 degrees of freedom in space, and redundant drive; without referring to the existing rigid mechanism, the topology with the best performance can be obtained according to the design problem, and the topology Unique and novel, it enriches the topology types of compliant parallel mechanisms.

Description

Technical field [0001] The invention relates to the field of precise positioning and precise operation, and particularly relates to a topology optimization method of a multi-degree-of-freedom compliant parallel mechanism. Background technique [0002] The traditional multi-degree-of-freedom compliant parallel mechanism generally adopts the rigid body substitution method for synthesis, that is, the rigid hinge in the existing rigid parallel mechanism is replaced with a flexible hinge, and the movement is transmitted through the elastic deformation of the flexible hinge. Such mechanisms can avoid problems such as hinge gap, friction, and assembly errors in rigid mechanisms, and have been widely used in technical fields such as micro-electromechanical technology and precision engineering. However, some rigid mechanism topologies obtained by the motion synthesis method, such as the method disclosed in patent CN200610038352.1, are not suitable for compliant mechanisms, and the motion ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 张宪民金莫辉
Owner SOUTH CHINA UNIV OF TECH
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