Realization of Universal Structural System of Dvornikov L.T. Concerning Solving the Problems of Structural Synthesis of Spatial Mechanisms

2015 ◽

Vol 756 ◽

pp. 495-499 ◽

Cited By ~ 2

Author(s):

Alexey Fomin

Keyword(s):

Special Kind ◽

3D Models ◽

3D Modelling ◽

Structural System ◽

Structural Synthesis ◽

Spatial Mechanisms ◽

Internal Surfaces ◽

Modelling Analysis ◽

Machine Elements ◽

Motion Paths

The present study provides structural synthesis, designing of 3D models and kinematic analysis of the developed spatial one-and two-movable mechanisms with imposed constraints. These mechanisms have an opportunity of technological application as mechanisms for cutting the complex internal surfaces of machine elements. The mechanisms produce a special kind of screw motion which is the most suitable means for cutting of complex spatial surfaces. Structural synthesis was based on mathematical solution of universal structural system where numbers of kinematic pairs and movable links were calculated. 3D-modelling analysis allowed to identify motion paths of their output links with machining tools. This investigation results gave an opportunity to analyze the tools motion, optimize their constructions and use of relevant parameters, and design their motions to obtain specified surfaces of machine elements.

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Mobility analysis and structural synthesis of a class of spatial mechanisms with coupling chains

Robotica ◽

10.1017/s0263574715000132 ◽

2015 ◽

Vol 34 (11) ◽

pp. 2467-2485 ◽

Cited By ~ 14

Author(s):

Wen-ao Cao ◽

Huafeng Ding ◽

Ziming Chen ◽

Shipei Zhao

Keyword(s):

Structural Analysis ◽

Parallel Mechanisms ◽

Mobility Analysis ◽

Structural Synthesis ◽

Systematic Method ◽

General Methodology ◽

Spatial Mechanisms ◽

Analysis And Synthesis

SUMMARYThis paper presents a systematic method for dealing with mobility analysis and structural synthesis of a class of important spatial mechanisms with coupling chains, which involve more complex coupling relations than spatial parallel mechanisms. First, an approach to the establishment of the motion screw equation of the class of mechanisms is derived. Then, a general methodology for mobility analysis along with detection of rigid substructures is proposed based on the motion screw equation. Third, the principle of structural synthesis of the class of mechanisms is established on the basis of the method of mobility analysis. Finally, some novel spatial mechanisms with coupling chains are synthesized, illustrating the effectiveness of the method. The study of the paper will benefit structural analysis and synthesis of more complex spatial mechanisms with coupling chains.

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Topological Characteristics and Automatic Generation of Structural Synthesis of Spatial Mechanisms: Part II — Automatic Generation of Structural Types of Kinematic Chains

22nd Biennial Mechanisms Conference: Flexible Mechanisms, Dynamics, and Analysis ◽

10.1115/detc1992-0379 ◽

1992 ◽

Author(s):

Ting-Li Yang ◽

Fang-Hua Yao

Keyword(s):

Kinematic Chain ◽

Automatic Generation ◽

Structural Synthesis ◽

Kinematic Chains ◽

Automatic Program ◽

Spatial Mechanisms ◽

Structural Types ◽

Topological Characteristics ◽

Linear Graphs ◽

Independent Loops

Abstract Based on the single-opened chain constraints and the network topological characteristics of mechanisms, a powerful new method for structural synthesis of spatial kinematic chain with plane and nonplane linear graphs has been developed. This permits the development of a highly efficient and completely automatic program for the computer-generated enumeration of structural types of mechanisms. The method is illustrated by applying to the case of kinematic chains with up to six independent loops on a personal computer.

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Structural synthesis of two-layer and two-loop spatial mechanisms with coupling chains

Mechanism and Machine Theory ◽

10.1016/j.mechmachtheory.2015.05.015 ◽

2015 ◽

Vol 92 ◽

pp. 289-313 ◽

Cited By ~ 24

Author(s):

Huafeng Ding ◽

Wen-ao Cao ◽

Ziming Chen ◽

Andrés Kecskeméthy

Keyword(s):

Structural Synthesis ◽

Spatial Mechanisms

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Topological Structural Synthesis of 4-DOF Serial-Parallel Hybrid Mechanisms

Journal of Mechanical Design ◽

10.1115/1.4004584 ◽

2011 ◽

Vol 133 (9) ◽

Cited By ~ 11

Author(s):

Qiang Zeng ◽

Yuefa Fang ◽

Kornel F. Ehmann

Keyword(s):

Group Theory ◽

Structural Synthesis ◽

Spatial Mechanisms ◽

Parallel Hybrid ◽

Hybrid Mechanisms ◽

Displacement Group

This paper analyzes the basic forms of 4-DOF spatial motions through the introduction of logical propositions for the topological structural synthesis of multiloop hybrid spatial mechanisms. The proposed method for the topological structural synthesis is based on displacement group theory and consists of two elements. First, spatial multiloop detachment (SMD) is proposed for the analysis of the output motion relations in multiloop topological arrangements. Second, configuration cards for displacement subsets of subchains (CCDS) are developed for subchain design. To demonstrate the applicability of SMD and CCDS to the four basic forms of 4-DOF motions, 12 novel serial-parallel hybrid mechanisms are synthesized that include the nonspanning tree netted form of topological arrangements.

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