A Flexible Discrete Building Block Synthesis Approach As Basis for the Design of Planar Linkages

2017 ◽  
Author(s):  
Simon Laudahn ◽  
Franz Irlinger ◽  
Kassim Abdul-Sater
Keyword(s):  
Building Block ◽  
Integrated Design ◽  
Optimal Solution ◽  
Design Tool ◽  
Grid Search ◽  
Approximate Synthesis ◽  
Synthesis Procedure ◽  
Block Based ◽  
Planar Linkages ◽  
Synthesis Approach

In this paper we present a computational approximate synthesis procedure for the planar RR chain. Our approach is based on a grid search and takes an arbitrary amount of user-defined task positions for the two outer bodies of the chain and restrictions for both joints into account. The result of this synthesis approach is not only one optimal solution, but a list of several possible solutions which are ranked according to their performance. The approach aims at being used in building block-based synthesis procedures of more complex linkages. The method shall later be included into a CAD-integrated design tool for planar linkages.

Load-Transmitter Constraint Sets: Part I—An Effective Tool for Visualizing Load Flow in Compliant Mechanisms and Structures

2010 ◽  
Author(s):  
Girish Krishnan ◽  
Charles Kim ◽  
Sridhar Kota
Keyword(s):  
Building Block ◽  
Deformation Behavior ◽  
Design Methodology ◽  
Compliant Mechanisms ◽  
Compliant Mechanism ◽  
Load Flow ◽  
Mathematical Framework ◽  
Design Synthesis ◽  
Fundamental Building Block ◽  
Block Based

Visualizing load flow aids in conceptual design synthesis of machine components. In this paper, we present a mathematical framework to visualize load flow in compliant mechanisms and structures. This framework uses the concept of transferred forces to quantify load flow from input to the output of a compliant mechanism. The key contribution of this paper is the identification a fundamental building block known as the Load-Transmitter Constraint (LTC) set, which enables load flow in a particular direction. The transferred force in each LTC set is shown to be independent of successive LTC sets that are attached to it. This enables a continuous visualization of load flow from the input to the output. Furthermore, we mathematically relate the load flow with the deformation behavior of the mechanism. We can thus explain the deformation behavior of a number of compliant mechanisms from literature by identifying its LTC sets to visualize load flow. This method can also be used to visualize load flow in optimal stiff structure topologies. The insight obtained from this visualization tool facilitates a systematic building block based design methodology for compliant mechanisms and structural topologies.

Optimal Synthesis of a Robomech: Procedure and Application

1999 ◽  
Author(s):  
Stephen Canfield ◽  
Giridhar Kolanupaka ◽  
Ahmad Smaili
Keyword(s):  
Linear System ◽  
Least Squares ◽  
Lagrange Multipliers ◽  
Direct Application ◽  
Optimal Synthesis ◽  
Nonlinear Constraints ◽  
New Class ◽  
Least Squares Optimization ◽  
Synthesis Procedure ◽  
Synthesis Approach

Abstract This paper presents and compares two optimal synthesis techniques for direct application in creating a robomech-II, the second manipulator presented in a new class of linkage arms called Robomcchs. The first optimal synthesis approach will solve the problem as a nonlinear optimization, with a subset of the device parameters described in a linear system and solved directly in a least squares sense. The second approach will employ a least squares optimization using Lagrange Multipliers to contend with nonlinear constraints. In this paper, each optimal synthesis procedure is developed for the general case and then applied to robomcch-II through an example.

scholarly journals Restriction of Conformation Transformation in Excited State: An Aggregation-Induced Emission Building Block Based on Stable Exocyclic C=N Group

iScience ◽  
2020 ◽  
Vol 23 (10) ◽  
pp. 101587
Author(s):  
Wentao Yu ◽  
Han Zhang ◽  
Ping-An Yin ◽  
Fan Zhou ◽  
Zhiming Wang ◽  
...  
Keyword(s):  
Excited State ◽  
Building Block ◽  
Aggregation Induced Emission ◽  
Block Based

scholarly journals Two software tools for facilitating the choice of ground source heat pumps by stakeholders and designers

2019 ◽  
Vol 111 ◽  
pp. 06023 ◽  
Author(s):  
Michele De Carli ◽  
Amaia Castelruiz Aguirre ◽  
Angelo Zarrella ◽  
Lucia Cardoso ◽  
Sarah Noyé ◽  
...  
Keyword(s):  
Decision Making ◽  
Energy Demand ◽  
Optimal Solution ◽  
Heat Pumps ◽  
Climatic Conditions ◽  
Design Tool ◽  
Detailed Calculation ◽  
Ground Source Heat Pumps ◽  
Ground Source ◽  
Support Decision Making

For promoting the diffusion of GSHP and making the technology more accessible to the general public, in the H2020 research project “CHeap and Efficient APplication of reliable Ground Source Heat exchangers and PumpS” (acronym Cheap-GSHPs) a tool for sizing these systems has been developed, as well as a Decision Support System (DSS) able to assist the user in the preliminary design of the most suitable configuration. For all these tools a common platform has been carried out considering climatic conditions, energy demand of buildings, ground thermal properties, heat pump solutions repository, as well as renewable energy database to use in synergy with the GSHPs. Since the aims of the tools are different, there are different approaches. The design tool is mainly addressed to designers. The calculation may be done in two ways: with a simplified method based on the ASHRAE approach and with a detailed calculation based on the numerical tool CaRM (Capacity-Resistance method). The DSS final aim is to support decision-making, by providing the stakeholders at all the level with a series of scenario. The Cheap-GSHPs project has developed a DSS tool aimed at accelerating the decision-making process of designers and building owners as well as increasing market share of the Cheap-GSHPs technologies. Hence the DSS generates different possible solutions based on a defined general problem, identifying the optimal solution. Both tools are presented in the paper, showing the potentialities provided by both software.

Finding All Solutions to Unconstrained Nonlinear Optimization for Approximate Synthesis of Planar Linkages Using Continuation Method

1999 ◽  
Vol 121 (3) ◽  
pp. 368-374 ◽  
Author(s):  
A.-X. Liu ◽  
T.-L. Yang
Keyword(s):  
Continuation Method ◽  
Optimization Method ◽  
Global Optimum ◽  
Kinematic Synthesis ◽  
All Solutions ◽  
Approximate Synthesis ◽  
Unconstrained Nonlinear Optimization ◽  
Optimum Solution ◽  
Planar Linkages ◽  
Four Bar Linkage

Generally, approximate kinematic synthesis of planar linkage is studied using optimization method. But this method has two defects: i) the suitable initial guesses are hard to determine and ii) the global optimum solution is difficult to find. In this paper, a new method which can find all solutions to approximate kinematic synthesis of planar linkage is proposed. Firstly, we reduce the approximate synthesis problem to finding all solutions to polynomial equations. Polynomial continuation method is then used to find all solutions. Finally, all possible linkages can be obtained. Approximate syntheses of planar four-bar linkage for function generation, rigid-body guidance and path generation are studied in detail and three examples are given to illustrate the advantages of the proposed method.

scholarly journals The Effect of Various Parameters of Solution Methodology on a Flexible Integrated Supply Chain Model

2018 ◽  
Vol 2018 ◽  
pp. 1-14 ◽  
Author(s):  
Elham Behmanesh ◽  
Jürgen Pannek
Keyword(s):  
Supply Chain ◽  
Customer Service ◽  
Integrated Design ◽  
Optimal Solution ◽  
Chain Model ◽  
Logistics Network ◽  
Large Size ◽  
Take Back ◽  
Supply Chain Model ◽  
Integrated Supply Chain

A successful supply chain must be able to operate at the lowest cost while providing the best customer service as well as environmental protection. As industrial players are under pressure but mostly unprepared to take back products after their usage, logistics network design becomes an even more important issue. To allow for a maximum of flexibility and efficiency, we consider an integrated design of the forward/reverse logistics network using full delivery graph. We apply a Memetic Algorithm with a novel population generation to find a near optimal solution for large size problems. The effect of different parameters on the behavior of the proposed Metaheuristic Algorithm is investigated. Using the experimental work to find the best parameters for this problem is the outlook of these researches.

Research and Development of Offshore Platforms for SMS Mining: Part 2—Conceptual Design of the Platform

2010 ◽  
Author(s):  
Sotaro Masanobu ◽  
Shunji Kato ◽  
Shigesuke Ishida ◽  
Shotaro Uto
Keyword(s):  
Conceptual Design ◽  
Integrated Design ◽  
Design Tool ◽  
Offshore Platform ◽  
Offshore Platforms ◽  
Design Support ◽  
Support Tool ◽  
Dynamic Positioning System ◽  
Operation Conditions ◽  
Design Support Tool

National Maritime Research Institute of Japan (NMRI) has been developing the integrated design support tool, called “Harmonic Design Tool”, for evaluating economical / safe / environmental aspects of the offshore platform. We are also conducting the conceptual design of the offshore platforms for assessing the availability and accuracy of this design support tool. Seafloor massive sulphides (SMS) are high-grade hydrothermal deposits rich in copper, zinc and lead with a high gold and silver content. The Japanese Economic Exclusive Zone (EEZ) is well known to have high potential of SMS. Thus we decided the SMS mining as one of the most promising applications for the offshore platform technologies. Based on the published potential map of resources and the metocean database established in this project, we decided Izu-Bonin Arc as the target sea area and derived the design and operation conditions for the offshore mining platform. Then we proceeded to the basic concept such as the production rate and storage capacity, dynamic positioning system for station keeping and operation availability. This paper presents the review of the conceptual design of the offshore platform for SMS mining.

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