How to Choose From a Synthesized Set of Path-Generating Mechanisms

2011 ◽  
Vol 133 (9) ◽  
Author(s):  
Sujitkumar V. Naik ◽  
Anupam Saxena ◽  
Ashok Kumar Rai ◽  
B. V. S. Nagendra Reddy
Keyword(s):  
Rigid Body ◽  
Compliant Mechanisms ◽  
Decision Matrix ◽  
Analytic Hierarchy ◽  
Qualitative And Quantitative ◽  
Design Alternatives ◽  
Compact Design ◽  
Body Joints ◽  
Design Simplicity ◽  
Hierarchy Process

Partially compliant mechanisms inherit the attributes of fully compliant and rigid-body linkages and offer simpler, compact design alternatives to accomplish complex kinematic tasks such as tracing large nonsmooth paths. This paper describes qualitative and quantitative criteria that can be employed to select the linkage configuration. The proposed criteria are categorized as general or specific. General criteria pertain to often-used kinematic attributes whereas specific criteria address the application at hand. The veracity and viability of each mechanism are evaluated with respect to compactness, design simplicity, static and dynamic failure, number of rigid-body joints, relative ease of fabrication, and other relevant criteria. Three decision-making techniques, namely, Pugh decision matrix, analytic hierarchy process, and a variant of the Pugh decision matrix are used to perform the evaluation. An example of a displacement-delimited gripper with a prescribed large nonsmooth path is used to illustrate linkage selection.

Evaluation of Equivalent Spring Stiffness for Use in a Pseudo-Rigid-Body Model of Large-Deflection Compliant Mechanisms

1994 ◽  
Author(s):  
Larry L. Howell ◽  
Ashok Midha
Keyword(s):  
Rigid Body ◽  
Large Deflection ◽  
Compliant Mechanisms ◽  
Compliant Mechanism ◽  
Spring Stiffness ◽  
Model Concept ◽  
Analysis And Design ◽  
Body Model ◽  
Rigid Body Model ◽  
Body Joints

Abstract Compliant mechanisms gain some or all of their mobility from the flexibility of their members rather than from rigid-body joints only. More efficient and usable analysis and design techniques are needed before the advantages of compliant mechanisms can be fully utilized. In an earlier work, a pseudo-rigid-body model concept, corresponding to an end-loaded geometrically nonlinear, large-deflection beam, was developed to help fulfill this need. In this paper, the pseudo-rigid-body equivalent spring stiffness is investigated and new modeling equations are proposed. The result is a simplified method of modeling the force/deflection relationships of large-deflection members in compliant mechanisms. Flexible segments which maintain a constant end angle are discussed, and an example mechanism is analyzed. The resulting models are valuable in the visualization of the motion of large-deflection systems, as well as the quick and efficient evaluation and optimization of compliant mechanism designs.

A grey analytic hierarchy process approach to project manager selection

2018 ◽  
Vol 31 (3) ◽  
pp. 749-765 ◽  
Author(s):  
Yakup Çelikbilek
Keyword(s):  
Analytic Hierarchy Process ◽  
Personal Information ◽  
Project Manager ◽  
Software Project ◽  
Decision Matrix ◽  
Analytic Hierarchy ◽  
Content Type ◽  
Energy Company ◽  
Manager Selection ◽  
Hierarchy Process

Purpose Evaluations of grey systems and systems with subjective judgements are always like an impasse for science and companies. Especially, calculations of the problems which include various units are really difficult situations. The purpose of this paper is to propose a grey analytic hierarchy process (G-AHP) for engineering and managerial problems with grey systems to make more clear and objective decisions. Design/methodology/approach Proposed G-AHP approach is applied to project manager selection for a software project of an energy company. The application includes three different units as year, score and assessment. Six engineers are evaluated with 25 criteria in the application. Weights of the factors and assessments are done by three top managers of the company as pairwise comparisons. Other data in the decision matrix are obtained from the personal information and exam results of engineers. Findings Final weights of the criteria and evaluations of engineers are all done with the proposed G-AHP. Obtained results of G-AHP are also compared with grey “VlseKriterijumska Optimizacija I Kompromisno Resenje” results as a validation of the calculations and proposed approach. Final results of the applications are ranked for the evaluations and comparison. All results of the case study are concluded with the effectiveness and applicability of the proposed G-AHP method both for this study and other fields of science, engineering and management. Originality/value This study provides to evaluate and interpret grey systems with different units and subjective judgements for science, engineering and management more clearly and objectively in an easier way.

Probabilistic Linguistic Analytic Hierarchy Process and Its Application on the Performance Assessment of Xiongan New Area

2018 ◽  
Vol 17 (06) ◽  
pp. 1693-1724 ◽  
Author(s):  
Wanying Xie ◽  
Zeshui Xu ◽  
Zhiliang Ren ◽  
Hai Wang
Keyword(s):  
Decision Making ◽  
Analytic Hierarchy Process ◽  
Uncertain Information ◽  
Decision Matrix ◽  
Analytic Hierarchy ◽  
Decision Tools ◽  
Probabilistic Linguistic Term Set ◽  
Complex Decision Making ◽  
The Individual ◽  
Hierarchy Process

Analytic Hierarchy Process (AHP) is one of the most favorable decision tools for dealing with complex decision-making problems. Probabilistic linguistic term set (PLTS) is an up-to-date tool to deal with uncertain information in the decision-making process. In this paper, we extend the AHP to the probabilistic linguistic environment for perfecting the modeling ability of AHP in various decision-making problems. In order to apply the PLTSs to the AHP properly, we first redefine the probabilistic linguistic comparison matrix (PLCM) and propose a new consistency index. Then, we propose a new approach to check and improve the consistency of the PLCMs. After that, we aggregate the individual PLCMs into the collective PLCM and derive the priorities of the collective PLCM. Finally, we combine the priorities with the decision matrix to complete the ranking of alternatives, and a case concerning the performance assessments of three new areas is given and the comparative analysis about the results is performed to demonstrate the feasibility of the proposed method.

scholarly journals Designing a model to determine the preferred Islamic contract for a bank facilities applicant

2018 ◽  
Vol 7 (2.2) ◽  
pp. 21
Author(s):  
Marzieh Jahani ◽  
Parastoo Mohammadi
Keyword(s):  
Evaluation Criteria ◽  
Industrial Sector ◽  
Point Of View ◽  
Second Phase ◽  
Optimization Approach ◽  
Compromise Solution ◽  
Decision Matrix ◽  
Analytic Hierarchy ◽  
The Cost ◽  
Hierarchy Process

This paper aims to present a model to determine the preferred Islamic contract for the bank facilities applicant in the industrial sector. For this purpose we use a consolidated method which includes the compromise solution multi-criteria optimization in the first phase, and the calculation of the cost of financing for the applicant of facilities in the second phase. Afterwards, by using the output of the both-phase, the preferred Islamic contract based on the combinational criterion has been determined for the applicant of the facilities. According to the fact that in the financing of the projects, in addition to the criteria related to the cost of financing, the qualitative criteria are also important, so both the qualitative and quantitative criteria have been considered in this research. In this study, we used four widely applied Islamic contracts (Jo’aalah Instalment sales, Hire purchase, Participation). The assessment criteria of the Islamic contracts have been extracted in the form of a questionnaire based on the previous studies and the expert’s point of view. In the first phase, the Analytic Hierarchy Process (AHP) has been used in order to determine the weights of the evaluation criteria of the Islamic contracts; and, in order to select an appropriate contract for the applicant, the compromise solution multi-criteria optimization approach (VIKOR), which is based on the decision matrix, was used. In the second phase, the cost of financing from the bank was estimated for the applicant of the facilities in the four contracts. Finally, the obtained results of the qualitative questionnaire and the cost of financing from the bank have been combined; thus, the preferred contract for the applicant of facilities has been determined based on a combinational criterion.

Evaluation Model to Exterior Wall Assemblies

2014 ◽  
Vol 1065-1069 ◽  
pp. 1626-1633
Author(s):  
Xiang Lei Hu ◽  
Sheng Cai Li ◽  
Hong Liang Yan ◽  
Gang Meng
Keyword(s):  
Evaluation Model ◽  
Evaluation Process ◽  
Value Engineering ◽  
Exterior Wall ◽  
Analytic Hierarchy ◽  
Qualitative And Quantitative ◽  
Quantitative Analyses ◽  
Code Changes ◽  
Wall Construction ◽  
Hierarchy Process

The Analytic Hierarchy Process (AHP) method presented in this paper is used to analyze three representative exterior wall assemblies from the perspective of manufacturers, designers, and consumers. Considering technical, economic, social, and environmental factors, a model and subsequent indicators were developed for qualitative and quantitative analyses. The approach discussed in this paper originated as a response to recent building code changes in China, and the need for value-engineers to better understand a set of newly developed wall construction assemblies in a way that minimizes subjective errors in the value-engineering evaluation process.

scholarly journals Destination Management for Ecotourism Activity Using Analytical Hierarchy Process

2022 ◽  
Vol 2022 ◽  
pp. 1-6
Author(s):  
Xi Wu ◽  
Shuying Qiao ◽  
Qiongqiong Tan
Keyword(s):  
Decision Making ◽  
Qualitative And Quantitative Analysis ◽  
Analytic Hierarchy ◽  
Suitable Candidate ◽  
Qualitative And Quantitative ◽  
Original Ecology ◽  
Local Residents ◽  
Reserved Area ◽  
Hierarchy Process ◽  
Selection Of

Analytic hierarchy process (AHP) refers to a decision-making method that decomposes the elements related to decision-making into goals, criteria, plans, and other levels and performs qualitative and quantitative analysis. Ecotourism is one component of sustainable tourism. Due to ecotourism activity, ecotourism links the reserved area with local residents and tourists. The aim of this research is to identify the proper ecotourism activity in Diaoluo Mountain National Nature Reserve with the help of the AHP method. The motivation behind the use of AHP is its widespread use in the decision-making process of selection of suitable candidate or alternative spot for tourists’ activity in the domain of ecotourism. The result shows that the most suitable ecotourism activity is “visit and experience life in the original ecology villages of Li and Miao ethnic minorities with a guide.” The proposed AHP decision-making method has effectively been used to select ecotourism activity based on multiple criteria evaluations.

scholarly journals Assessment of Urban Resiliency Concerning Disaster Risk: A Review on Multi- Dimensional Approaches

2022 ◽  
Vol 12 (3) ◽  
pp. 111-125
Author(s):  
Tusar Kanti Roy ◽  
Sharmin Siddika ◽  
Mizbah Ahmed Sresto
Keyword(s):  
Assessment Tool ◽  
Disaster Resilience ◽  
Urban Resilience ◽  
Analytic Hierarchy ◽  
Qualitative And Quantitative ◽  
Resilience Index ◽  
Definition Of ◽  
Resilience Indicators ◽  
New Research ◽  
Hierarchy Process

There have been a number of new research published with different methodologies and frameworks in recent years, aimed at improving city resilience to a variety of man-made and natural calamities. As climate change progresses, resilience will become a more important topic in scientific and policy circles that influence future urban development. This review article first provides the definition of resilience. Then it represents some of the adopted methodologies in an extensive way. Approaches including Baseline Resilience Indicators for Communities (BRIC), Climate Disaster Resilience Index (CDRI), Disaster resilience index based on Analytic Hierarchy Process (AHP), Composite indicator based approach, Hyogo Framework and so on. This section discusses about urban resiliency assessments to mitigate vulnerability, offer a set of principles and indicators for creating an urban resilience assessment tool. Findings of this study not only address a variety of qualitative and quantitative aspects of urban resilience but also describes about different indicators such as environmental resources, socio-economic and built environment, infrastructure, governance and institutional indicators. Journal of Engineering Science 12(3), 2021, 111-125

scholarly journals Evaluation Method to Select Pure Electric Buses Based on Road Operation Tests

2019 ◽  
Vol 11 (1) ◽  
pp. 4
Author(s):  
Yanzhong Liu ◽  
Jie He ◽  
Wenhui Lu ◽  
Xintong Yan ◽  
Cheng Cheng
Keyword(s):  
Evaluation Method ◽  
Economic Security ◽  
Environmental Concerns ◽  
Analytic Hierarchy ◽  
Qualitative And Quantitative ◽  
Actual Operation ◽  
Design Selection ◽  
Quantitative Indicators ◽  
Hierarchy Process ◽  
Selection Of

In China, the development of pure electric buses is an essential means to address energy and environmental concerns. Proper evaluation and selection of pure electric buses is a crucial step prior to introducing the buses into actual operation. This paper presents a multi-objective method for the selection of pure electric buses based on road driving tests. An index system for evaluating the operating performance through the fuzzy analytic hierarchy process is established, and to ensure the method is more systematic than those in previous studies, indicators are classified into three categories: qualitative, semi-qualitative and quantitative indicators, of which the nineteen indexes have been comprehensively considered and designed. To verify the advantage of the evaluation method proposed in the article, two typical buses were selected as the assessed objectives regarding reliability, economic, security, environmental adaptability, etc. The assessing process indicates that the method is easily implemented and of high practical value. Additionally, the results show satisfactory agreement with the actual scenario. Thus, it can be assumed that the method detailed herein provides a basis for the design, selection, and evaluation of pure electric buses.

scholarly journals Modelling of cave-in occurrence using AHP and GIS

2014 ◽  
Vol 14 (8) ◽  
pp. 1945-1951 ◽  
Author(s):  
A. A. Malinowska ◽  
K. Dziarek
Keyword(s):  
Prediction Models ◽  
Ahp Method ◽  
Analytic Hierarchy ◽  
Qualitative And Quantitative ◽  
Discontinuous Deformation ◽  
Qualitative Factors ◽  
Predicted Values ◽  
Hierarchy Process ◽  
Risk Potential ◽  
Very High

Abstract. The analysis of mining-induced sinkholes occurrence is a very important issue as far as the spatial development optimization is concerned. Research conducted for this paper was focussed on examining the applicability of GIS and the associated AHP method (analytic hierarchy process) for estimating the risk of discontinuous deformation occurrence on the surface. Qualitative factors were accounted for in the sinkhole risk assessment, thus creating bases for the research. These elements play an important role in the process of sinkholes formation; however, they were not used in prediction models. Another assumption lay in minimizing the number of variables in the model. Accordingly, the most important qualitative and quantitative risk factors were finally selected on the basis of whether the risk of cave-ins occurrence on the surface could be calculated. The results of the estimation of potential sinkhole zones were verified. The locations of actual and high-risk potential discontinuous deformation were compared. The congruence between predicted values and the actual observations of sinkholes was very high. The results of research presented prove the necessity to evaluate sinkhole hazards in view of qualitative factors.

PRIORITIZING FEEDERS FOR MAINTENANCE ACTIVITIES USING AHP IN NUCLEAR POWER PLANTS

2007 ◽  
Vol 14 (03) ◽  
pp. 275-282 ◽  
Author(s):  
A. SRIVIDYA ◽  
H. N. SURESH
Keyword(s):  
Nuclear Power ◽  
Power Plants ◽  
Decision Making Process ◽  
Decision Criteria ◽  
Analytic Hierarchy ◽  
Qualitative And Quantitative ◽  
Prioritization Process ◽  
Maintenance Activities ◽  
Hierarchy Process ◽  
Pair Wise Comparison

The Analytic Hierarchy Process (AHP) is a powerful and flexible decision making process to help people set priorities and make the best decision when both qualitative and quantitative aspects are to be considered. In this paper, a procedure of prioritizing the outlet feeders under multiple criteria using Saaty's priority theory is presented. In priority theory, weights are assigned to the decision criteria via pair wise comparison of criteria. Seven outlet feeders (alternatives) and three decision criteria have been considered and the prioritization process is illustrated with an example case.

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