登录

  • 登录
  • 忘记密码?点击找回

注册

  • 获取手机验证码 60
  • 注册

找回密码

  • 获取手机验证码60
  • 找回
毕业论文网 > 文献综述 > 机械机电类 > 工业工程 > 正文

混合动力车辆冷却系统的故障模式风险分析方法研究文献综述

 2020-04-20 13:02:15  

1.目的及意义

1. Significance andDomestic/Foreign Research Status Analysis

Developmentof fault free systems and theirrisk assessment, in early phase of development were set in 1950s, which later on used a standardise techniques for safety and reliabilityissues in products. Failure Modes and Effect Analysis (FMEA) introduced as oneof them and still considers a much reliabletechnique to identify and mitigate risks in early phase of system designingeven though systems become complex now days.This report presents an extensionto Failure Mode and Effect Analysis (FMEA),in such a way that it can be appliedfor safety analysis of complex systems; both for hardware and softwaredevelopment using object oriented approach.

A systematic approach for validationand identification of failure modes were used in this method using systemarchitecture; a complete boundary diagram with the behaviour of the system inlogical, physical and attribute objects. Behaviour of selected objects wereanalysed using FMEA methodology with the help of system designing team, wherevalidation and verification processes highlights possibility of redesigning ormodifying component. Cabin cooling system for hybrid vehicle is used as a casestudy for this purpose.

Volvo Car Group (VCG) is one of the most well-shy;‐known and respectedcar brands with sales in morethan 100 countries. The first car from VCG was produced in 1927 at Gothenburg, sincethen they have delivered several reliable cars equipped with the world-shy;‐leadinginnovations. Today they have produced some premium cars as well, with differentbody types: Sedans, Estates/Sports wagons, Cross Country vehicles, SUVs, Convertibles etc.[1] and still committee to bring top level satisfaction to customers with premium productsand services, containing high quality standards. In 2012, Volvo Cars sold a totalof 421,951 cars. Relative to the strength of the brand, Volvo Cars is a small producer, with a global marketshare of 1–2percent.The largest market, the United States, represented some 16per cent of the total sales volume in 2012, followed by Sweden (12%), China (10%),Germany (7.5%) and the UK (7.5%).

Quality was of paramount importance to the men who founded Volvo. This basic concept, which wasformulated back in 1926, still applies to Volvo's way of making cars. Today, demand of reliable and high quality vehicles from the customers areone of the biggest challenges car industries are facing, because of rise in capabilities and functionality of modern vehicles. They somehow,directly or indirectly affects their quality and reliability standards.Conventionally, reliability has been accomplished through widespreadtesting and applies of method such as probabilistic reliability modelling [2] but the problem with thesetechniques is that they are performed in the delayed phase of improvement. The challenge is to devise in quality andreliability early in expansion phase, where it is simpler to acquire actions,which overcome these with the help of improved consistency in design methods. Failure mode and effect analysis (FMEA) plays an important role here; itevaluates the possible reliability troubles (failures) in the early hours ofthe progress cycle. Steady use of this technique in design process let theengineer to drawing out the failures in manufacture dependable, protected, andcustomer satisfy in goods. It alsocarries the chronological information, which can be used in upcoming product development[3].


Modern automotive sub-shy;‐systems are basicallybuilt within an extensive electrical architecture, where linked components interactand share abundant software and hardware resources. In a sub-shy;‐system, the elements or components perform their task by interacting with each other and sharinginformation with other sub-shy;‐systems in the distributed environment which results interdependencies and as a result of these interdependencies between multiple sub-shy;‐systems, emergence will occurs.Performing failure mode analysis of these systemsbecomes a tedious task. The individual sub-shy;‐systems have overlaps and theirboundaries are often unclear.


{title}

2. 研究的基本内容与方案

{title}

2. Basic content,Objectives and Proposed Technical Solutions and Measures of the Research

剩余内容已隐藏,您需要先支付 5元 才能查看该篇文章全部内容!立即支付

微信号:bysjorg

Copyright © 2010-2022 毕业论文网 站点地图