The Calculating Method of the Degree of Freedom about the Rigid-Flexible Hybrid Mechanism

2013 ◽  
Vol 821-822 ◽  
pp. 1461-1465
Author(s):  
Ze Guang Han ◽  
Rui Qin Hao
Keyword(s):  
Error Probability ◽  
Mechanical Engineering ◽  
Kinetic Characteristic ◽  
Design Concept ◽  
Degree Of Freedom ◽  
Calculating Method ◽  
Hybrid Mechanism ◽  
Flexible Mechanism

The learning and interchange of the research workers in mechanical engineering field is very difficult because the high error probability and difficult understanding in the degree of freedom calculation about the rigid-flexible hybrid mechanism.In this paper,the pairing and mechanism characteristics of flexible mechanism have been firstly researched based on the kinetic characteristic of flexible mechanism.The degree of freedom calculating method of the flexible mechanism has been provided.This method is then expanded to the degree of freedom calculating of the rigid-flexible hybrid mechanism.The above methods are correct and validity by some examples testing.and it can efficiently support the design concept verifying.

scholarly journals Corrigendum

2018 ◽  
Vol 10 (7) ◽  
pp. 168781401879028
Keyword(s):  
Financial Support ◽  
Mechanical Engineering ◽  
Parallel Robot ◽  
Degree Of Freedom ◽  
Technology Evaluation ◽  
Energy Technology ◽  
Future Planning ◽  
The Republic ◽  
Tension Analysis ◽  
Bearing Friction

Choi S-H, Park J-O and Park K-S. Tension analysis of a 6-degree-of-freedom cable-driven parallel robot considering dynamic pulley bearing friction. Advances in Mechanical Engineering 2017; 9(8): 1–10. DOI: 10.1177/1687814017714981 In the above-referenced article, the authors wish to update their statement on Funding. A new version of the statement is provided below: Funding The authors disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This research was supported by Leading Foreign Research Institute Recruitment Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (MSIP) (No.2012K1A4A3026740). This work was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea (20174030201530).

A Two Degree of Freedom Nanopositioner With Electrothermal Actuator for Decoupled Motion

2011 ◽  
Author(s):  
Yong-Sik Kim ◽  
Nicholas G. Dagalakis ◽  
Satyandra K. Gupta
Keyword(s):  
Design Concept ◽  
Degree Of Freedom ◽  
Motion Platform ◽  
Element Analysis ◽  
Electrothermal Actuators ◽  
Electrothermal Actuator ◽  
Decoupled Motion ◽  
Moving Platform ◽  
Two Degree Of Freedom ◽  
Novel Design

Building a two degree-of-freedom (2 DOF) MEMS nanopositioner with decoupled X-Y motion has been a challenge in nanopositioner design. In this paper a novel design concept on making the decoupled motion of the MEMS nanopositioner is suggested. The suggested nanopositioner has two electrothermal actuators and employs a fully nested motion platform with suspended anchors. The suggested MEMS nanopositioner is capable of delivering displacement from the electrothermal actuator to the motion platform without coupled motion between the two X-Y axes. The design concept, finite element analysis (FEA) results, fabrication procedures and the performance of the 2 DOF nanopositioner is presented. In order to test the nanopositioner moving platform decoupled motion, one actuator moves the platform by 60 μm, while the other actuator is kept at the same position. The platform position cross talk error was measured to be less than 1 μm standard deviation.

Explicit Evaluation of Design Readiness for Student Refinement of Conceptual Design

2019 ◽  
Author(s):  
Kenji Iino ◽  
Masayuki Nakao
Keyword(s):  
Conceptual Design ◽  
Mechanical Engineering ◽  
Design Concept ◽  
Graduate Schools ◽  
Design Concepts ◽  
Detail Design ◽  
Explicit Evaluation ◽  
The University ◽  
The Way

Abstract Students at three graduate schools of mechanical engineering and adult groups in Japan have been taking conceptual design courses the authors teach. Among the three graduate schools, the 24 hour course, at the University of Tokyo, spread over 13 classes during 4 months, takes the students all the way from identifying their design goals, generating ideas, refining their designs, to building prototypes. The adult course students also spend long hours of building prototypes. Despite strong encouragement by the instructors for detail design, the students often leave their design concepts at rough stages without refining their ideas to the detail level needed for prototype building. Building a prototype from a design concept that is not fully expanded often results in efforts that lead to failure and retrial. Such back and forth between concepts and physical trial is unavoidable in design, however, if possible they better be kept at the minimum. The instructors, in their efforts to better motivate students to refine the designs, developed a metric “Level of Readiness (LOR) index” for evaluating how refined a design is. Students are better motivated to reach higher scores and this index that evaluate the quality of their designs, in terms of how detail they are, in numbers serves as a better incentive for the students than words from the instructors.

New Machine for Complex Structure Decoration Materials

2012 ◽  
Vol 178-181 ◽  
pp. 262-266
Author(s):  
Jian Guo Luo ◽  
Mao Yan He
Keyword(s):  
Complex Structure ◽  
Three Dimensional ◽  
Influential Factors ◽  
Degree Of Freedom ◽  
Topological Graph ◽  
Working Space ◽  
Hybrid Mechanism ◽  
Definition Of ◽  
Six Degree Of Freedom ◽  
Necessary And Sufficient

A new type of machine for complex structure decoration materials based on hybrid cubic manipulator with six degree of freedom(DOF) suggested in view of traditional serial manipulator and parallel manipulator, three dimensional translation and rotation of output shaft obtained through lineal driving. Define the description of spacial moving capability of common couples and translation base and rotation base of mechanism, based on the fact of mechanism consists of components, a new description method by topological graph theory of components relationship suggested, new description of serial mechanism and parallel mechanism and hybrid mechanism obtained with this method, description elements include component pane and constrained component pane and component relationship line and constrained component relationship line and spacial relative moving capability between adjacent components. DOF(degree of freedom) of hybrid mechanism analysised with example based on the definition of dimensionity of branch spacial moving capability and mechanism spacial moving capability, necessary and sufficient condition of nonsingularity of mechanism presented. Method of analytic geometry used to find the regular cuboid of the reachable working space shape of mechanism, the volume of the reachable working space rest with the limit of translation of couplers, its influential factors obtained, limit length of guideway etc. are the primary influential factors.

Topological Research on Hybrid Mechanism

2012 ◽  
Vol 271-272 ◽  
pp. 1761-1764
Author(s):  
Jian Guo Luo ◽  
Mao Yan He
Keyword(s):  
Parallel Manipulator ◽  
Synthesis Method ◽  
Singularity Analysis ◽  
Degree Of Freedom ◽  
Spatial Mobility ◽  
Hybrid Mechanism ◽  
Hybrid Manipulator

Methods to analysis the DOF(degree of freedom) and singularity of pure serial and pure parallel manipulator, which can not be used to the hybrid manipulator directly, three type of practical topological units and one type of virtual topological unit adopted, Synthesis method of topological dimensionality of the spatial mobility of each topological unit integrated together, architectures of serial-paralle mechanism discussed, also the formula and process of its topological dimensionality of spatial mobility presented, singularity analysis of hybrid mechanism can be carried out based on the forgoing results.

scholarly journals Organic Waste Chopper Tool Design Using Autodesk Inventor 2015 Software

2019 ◽  
Vol 19 (2) ◽  
pp. 68
Author(s):  
Nengah Ludra Antara
Keyword(s):  
Manufacturing Process ◽  
Mechanical Engineering ◽  
Organic Waste ◽  
Tool Design ◽  
Design Concept ◽  
Drawing Process ◽  
Size Scale ◽  
Image Projection ◽  
Materials Used

In the program of mechanical engineering, the software used to draw is Autodesk Inventor. Autodesk inventor is a CAD program in the program of engineering that is applied to the design of mechanics in 3D. In designing a tool, of course, it is preceded by a planned design concept. In making a design a tool requires a process or steps for making the design. These steps include the size, dimensions, and materials used in making organic waste chopper tool. The drawing process uses the 2015 Autodesk Inventor program, the first is the making of sketches, components on the machine, followed by assembly of each component, then rendering images, animation as the final stages of drawing design input into "IDW" complete with size, scale, material. Image projection to make it easier for designers to make tools. Drawings of plan and complete details covering the scale dimensions will be able to simplify the manufacturing process (production) of the components of the tool and can reduce the risk of errors in the process of making tools.

Analysis on Degree of Freedom and Singularity of Mechanism Based on Topological Graph Theory

2011 ◽  
Vol 393-395 ◽  
pp. 20-23
Author(s):  
Jian Guo Luo ◽  
Mao Yan He
Keyword(s):  
Graph Theory ◽  
Degree Of Freedom ◽  
Sufficient Condition ◽  
Necessary And Sufficient Condition ◽  
Topological Graph ◽  
Topological Graph Theory ◽  
Hybrid Mechanism ◽  
Definition Of ◽  
Necessary And Sufficient ◽  
Case Number

Based on the analysis of current developing state of graph theory, define the description of spacial moving capability of common couples and translation base and rotation base of mechanism, based on the new description method in topological graph theory. DOF(degree of freedom) of hybrid mechanism analysised with example based on the definition of dimensionity of branch spacial moving capability and mechanism spacial moving capability, necessary and sufficient condition of nonsingularity of mechanism presented, as well as the necessary and sufficient condition of singularity of mechanism deduced , in-phase and assimilation condition and in-phase and dissimilarity condition and asynchronism condition of limitation of input base of branch adopted, case number of position singularity and pose singularity and position and pose singularity obtained then, still the way of founding the combination and case number of common serial mechanism and parallel mechanism and hybrid mechanism mentioned.

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