Design Optimization for a Parallel MEMS Mechanism With Flexure Joints

2004 ◽  
Author(s):  
Byoung Hun Kang ◽  
John T. Wen ◽  
Nicholas G. Dagalakis ◽  
Jason J. Gorman
Keyword(s):  
Performance Metrics ◽  
Design Method ◽  
Design Tool ◽  
Analysis Tool ◽  
Parallel Mechanisms ◽  
Analysis And Design ◽  
Design Variables ◽  
Stiffness Matrices ◽  
Flexure Joints ◽  
Task Specification

This paper presents an analysis tool and design method for MEMS parallel mechanisms. Due to processing constraints in MEMS fabrication, flexure joints are frequently used in MEMS mechanisms. Flexure joints offer advantages over other joint designs due to their monolithic characteristics. They can be used to reduce the size of manipulators or to increase the precision of motion. Their inherent flexibility, however, also results in task space compliance which needs to be carefully designed to match the task specification. This paper presents an analysis and design tool for such mechanisms by using the differential kinematics. Performance metrics are chosen based on manipulability and task stiffness matrices, which in turn are used in a multi-objective optimization. As an illustrative example, a 1-DOF MEMS parallel mechanism based on the macro- and meso-scale models designed by NIST is considered with several choices of performance metrics and design variables. The resulting designs are successfully fabricated using DRIE process.

Set-Based Design Method for the Early Phase Design of Structures With Uncertainties

2010 ◽  
Author(s):  
Masato Inoue ◽  
Yutaka Hattori ◽  
Haruo Ishikawa
Keyword(s):  
Structural Design ◽  
Early Phase ◽  
Design Method ◽  
Analysis Tool ◽  
Design Variables ◽  
Point Solution ◽  
Design Solutions ◽  
Set Based Design ◽  
Express Information ◽  
Analyze Structure

Since an early phase of design intrinsically contains uncertainties from various sources of variations, design performances are fluctuating or reflect uncertainty caused by uncertain design variables. Analysis tool such as finite element method (FEM) is useful for structural analysis. However, using unique point solution does not express information about uncertainties. Designers need to figure out an outline of the structural feature and have to obtain a design idea under some uncertain design information in a structural design at the early phase of design. We have proposed a preference set-based design (PSD) method that generates a ranged set of design solutions that satisfy sets of performance requirements. This study proposes a structural design method for the early phase of design based on the PSD method that is possible to analyze structure with design uncertainty by elastic FEM and obtain a ranged set of design solutions. That is, a design method for analyzing structures and obtaining a ranged set of design solutions with uncertainties of material property and dimension of structure (coordinates of geometry) under fluctuating distribution of performance characteristics of stress and displacement is proposed. In order to illustrate the availability of our approach, design problem of 3-dimensional truss structure is solved.

scholarly journals Analysis and Design of PMBLDC Motor for Three Wheeler Electric Vehicle Application

2019 ◽  
Vol 87 ◽  
pp. 01022
Author(s):  
V. Sandeep ◽  
Sharankumar Shastri
Keyword(s):  
Permanent Magnet ◽  
Analysis Tool ◽  
Element Analysis ◽  
Analysis And Design ◽  
Brushless Dc ◽  
Design Variables ◽  
Radial Flux ◽  
Electromagnetic Characteristics ◽  
Permanent Magnet Brushless Dc ◽  
Analytical Tools

This paper deals with analysis and design of permanent magnet brushless dc machine (PMBLDCM), primarily aimed for three wheeler applications. The motor sizing accounts for the forces acting on the motor and the design variables such as number of stator and rotor slots, stator and rotor dimensioning, air-gap approximation, slot sizing, flux per pole and permanent magnet sizing has been explained using simplified equations. The designed motor rated at 1.5 kW, 3000 rpm, 120 V radial flux surface mounted permanent magnet rotor, is then assessed using analytical tools for design such as ANSYS’s RMXprt to verify the analytically obtained results. These results are then verified using the computer aided analysis tool, finite element analysis, using ANSYS Maxwell, to obtain the electromagnetic characteristics of the motor for further modification of design.

Simplified propeller analysis and design including effects of stall

2016 ◽  
Vol 120 (1227) ◽  
pp. 796-818 ◽  
Author(s):  
L.W. Traub
Keyword(s):  
Small Angle ◽  
Design Methodology ◽  
Design Tool ◽  
Analysis Tool ◽  
Blade Design ◽  
Analysis And Design ◽  
Propeller Design ◽  
Vortex Theory ◽  
Simplified Method

ABSTRACTA simplified method to analyse propellers based on vortex theory is presented. Small-angle approximations are implemented to eliminate the need for iteration in the determination of the induced angle-of-attack. A stall model is developed and combined with analytic relations describing the blade aerofoil characteristics, eliminating the need for look-up tables of aerofoil behaviour. The method is also extended to serve as an optimal propeller design tool. Comparisons of the approach with experiment are presented for validation as an analysis tool. Use of the theory as a design tool is also demonstrated through contrast with an existing blade design methodology.

Analytical Compliance Analysis and Synthesis of Flexure Mechanisms

2011 ◽  
Author(s):  
Hai-Jun Su ◽  
Hongliang Shi ◽  
JingJun Yu
Keyword(s):  
Design Method ◽  
External Loading ◽  
Motion Direction ◽  
Compliance Matrix ◽  
Flexure Mechanism ◽  
Physical Experiments ◽  
Stiffness Matrices ◽  
Analysis And Synthesis ◽  
Flexure Joints ◽  
Robust Design Method

This paper presents a symbolic formulation for analytical compliance analysis and synthesis of flexure mechanisms with arbitrary topologies. Compliance analysis or mapping is to determine the relationship between the deformation of a mechanism and the external loading applied. It is a crucial step for the control and design of flexure mechanisms. Most of the current work relies on physical experiments or numerical simulations for studying the compliance or stiffness of flexure mechanisms. There is a lack of formal tools for the compliance synthesis whose goal is to determine the geometry of flexures or assembly of multiple flexures for a prescribed compliance in the motion direction of interest. In this work, we first derive a symbolic formulation of the compliance and stiffness matrices for commonly-used flexure elements, flexure joints and simple chains. Elements of these matrices are all explicit functions of flexure parameters. To analyze a complex flexure mechanism, we subdivide the mechanism into multiple structural modules which we identify as serial, parallel or hybrid chains. We then analyze each module with the known flexure structures in the library. At last we use a bottom-up approach to obtain the compliance matrix for the overall mechanism. Our symbolic formulation enables subsequent compliance synthesis or sensitivity analysis which is to determine how each flexure parameter affects the overall compliance of the mechanism. Four practical examples are provided to demonstrate the approach. The result is a robust design method for the compliance analysis and synthesis of flexure mechanisms.

Structural Design and Finite Element Analysis for Planet Wheel Gear System

2014 ◽  
Vol 556-562 ◽  
pp. 1174-1177
Author(s):  
Xiao Jing Li ◽  
Cheng Si Li ◽  
Di Wang ◽  
Dong Man Yu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Optimization Design ◽  
Bending Strength ◽  
Design Method ◽  
Design Tool ◽  
Gear System ◽  
Scale Model ◽  
Analysis Tool ◽  
Element Analysis

Calculation the gear bottom bending strength and the gear surface contacting stress are traditional wheel gear design method. It takes a long time to design and works out parameters for gears system. Nowadays, the optimization design and reliability theory are introduced into modern engineering, we can make full use of the calculator tool to look for the best design parameter. Modern powerful finite element analysis software packages such as ANSYS are now not only an analysis tool but a design tool as well. This kind of technology makes planet wheel gear system design quantified precisely combining with physics principles in one. In the study, we designed a planet carrier with traditional method and built three dimensional full-scale model in Pro/E software. Based on finite element analysis, the finally result of stress distribution and deformation distribution is obtained. The results indicate that the design can meet the requirement.

scholarly journals Analysis and design of parallel mechanisms with flexure joints

2005 ◽  
Vol 21 (6) ◽  
pp. 1179-1185 ◽  
Author(s):  
Byoung Hun Kang ◽  
J.T.-Y. Wen ◽  
N.G. Dagalakis ◽  
J.J. Gorman
Keyword(s):  
Parallel Mechanisms ◽  
Analysis And Design ◽  
Flexure Joints

scholarly journals Design of Bldc Motor for Agriculture Pump Application

2019 ◽  
Vol 8 (2) ◽  
pp. 441-446
Keyword(s):  
Design Method ◽  
Fem Analysis ◽  
Element Model ◽  
Analytical Models ◽  
Design Parameters ◽  
Analysis Tool ◽  
Bldc Motor ◽  
Analytical Design ◽  
Design Variables ◽  
Design Calculations

This paper presents the analytical design method for surface mounted BLDC motor to meet the performance requirements of submersible Pump for agriculture application. The design calculations involved assumption of various design variables viz. Stacking factor, leakage factor, Flux densities in stator and rotor yokes and flux density in the stator teeth etc. With these assumptions the geometry of the intended motor is derived. The geometrical information like the rotor diameter, rotor and stator thickness and stator teeth thickness etc. obtained from the analytical calculations are used as input to Finite Element Model (FEM) Analysis tool FEMAG. The Torque-Speed characteristics, back EMF, flux densities in various parts of the motor are obtained from FEM Analysis and the same are compared with the results obtained from Analytical design. Various designed parameters like airgap length, stack length and magnet widths are varied and their influence on the characteristics of the intended BLDC motor is obtained through FEM Analysis. Based on the analytical models and FEM Analysis the design parameters are tweaked until the desired performance for the agriculture pump is accomplished.

Conceptual Design of Mechanical Systems

1991 ◽  
Author(s):  
Richard V. Welch ◽  
John R. Dixon
Keyword(s):  
Conceptual Design ◽  
Design Method ◽  
Design Tool ◽  
Graph Representation ◽  
Analysis Tool ◽  
Functional Requirements ◽  
Bond Graphs ◽  
Embodiment Design ◽  
Behavior Description ◽  
Two Stages

Abstract This paper presents a method for generating solutions to a class of conceptual design problems. We define conceptual design as the transformation of functional requirements to abstract physical systems in two stages: 1) phenomenological design — transforming a functional requirement to a behavior description by using physical principles; and 2) embodiment design — transforming the behavior specification to a physical embodiment that exhibit the required behavior. In order to reason about the behavior of in-progress designs, a new representation called behavior graphs has been defined. Behavior graphs are similar to bond graphs but have been developed as a design tool. (Bond graphs were developed as an analysis tool.) In order to guide the design process, the iterative redesign model of design is used at both the phenomenological and embodiment levels. The behavior graph representation and iterative redesign model constitute the conceptual design method presented here. A experimental computer program implementing this method is discussed and illustrative examples presented.

Pengembangan Sistem Informasi Siklus Pendapatan pada PT XYZ (Pendekatan Studi Kasus)

2014 ◽  
Vol 5 (1) ◽  
pp. 12-19
Author(s):  
Yohannes Kurniawan ◽  
Janastasha Christie Parapaga
Keyword(s):  
Information System ◽  
Information Systems ◽  
Business Processes ◽  
Design Method ◽  
Accounting Information ◽  
Accounting Information System ◽  
Accounting Information Systems ◽  
Analysis And Design ◽  
Research Goal ◽  
Revenue Cycle

The research goal is to identify and analyze the need of accounting information system related to the revenue cycle at PT XYZ. This paper designing the useful of accounting information systems to support the current business processes, especially on the revenue cycle process. The design method is an Object Oriented Analysis and Design (OOAD) which refers to the modeling and design requirements discipline. And the result achieved by analysis and design of accounting information systems can support current activities of the revenue cycle, especially for the documentation and store of transaction data, and generate reports in accordance with company requirements. Conclusions derived from the analysis and design is the implementation of a webbased application that can help PT XYZ to do the work in different places, such as marketing office, head office and especially at the exhibition. Index Terms - Accounting Information System, revenue cycle, OOAD 

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