【机械类毕业论文中英文对照文献翻译】机器人和计算机集成制造
【机械类毕业论文中英文对照文献翻译】机器人和计算机集成制造,机械类毕业论文中英文对照文献翻译,机械类,毕业论文,中英文,对照,对比,比照,文献,翻译,机器,人和,计算机,集成,制造
附录机器人和计算机集成制造文章历史: 2008年11月22日收稿摘 要:复杂的肩膀,又称盂肱关节是最机动性和最良好的使用对人体关节之一。随着时间的推移,问题可以与盂肱关节周围的肌肉,软骨,肌腱和韧带,造成了强调肩膀复杂的老化或发生。这项工作,探讨了一个新的创新肩关节试验台的设计。试验台是模仿人体运动肱骨和复制的所有范围内的议案,它可以移动,在与有关的骨骼,肌肉,韧带和肌腱在肩膀复杂的结合。可变的力量也将适用于所有范围内的议案,盂。研究必须在肩部复杂和力量盂范围内的议案进行。最初的概念设计创建模仿特定范围内的议案;内收,屈曲,内(内侧)和外部(横向),例如旋转。概念发展相结合,开发一个试验台,将复制任何轴向运动的肩膀。研究确定最合适的制造工艺和材料,使试验台可以在材料实验室制造。关键词:肩关节、肩、试验台、部队、设计、制造。1、简介盂肱关节是最机动性和在身体的最知名的关节之一。它可以成为破坏由于体育活或通过一般的磨损,这可能会导致严重的问题,为受伤的人。外科医生,工程师和研究人员正在继续调查肩膀问题患者的生活质量改善的方法,并正在开发替代的方法,修复和减少可能出现的问题肩关节。开展了这项研究,以便进一步发展到预防肩部受伤,更换和维修可以通过一个新的和创新的肩关节试验台的设计。该试验台将允许研究人员进行人工肱骨骨头上测试,并让他们添加人工肌肉和盂肱关节的力量,并在这一领域的技术和知识的进步。上面显示的主要骨骼和肌肉弥补肩膀复杂的。肱骨的肩肩试验台的设计是围绕主骨。随着人们年龄的肱骨能成为磨损,容易发生骨关节炎。这将导致软骨,用于分发压力和肩膀上的负荷,恶化。在严重的情况下,肱骨头必须更换假肢设备。该试验台的设计模拟盂行事,在任何范围内的议案,使新的假肢装置可以设计和测试的力量。2、肩部复杂和范围的议案这里是六个主要的议案,这些都为内收,外展,延伸,屈曲,内(内侧)和外部(横向)转动肩膀可以执行。这些动作都被限制肩部复杂的肌肉和韧带。肩部有任何关节的运动范围最大,在人体17-19(图2)。绝对收的收,机械是不可能的,因为主干的存在。从参考点的位置开始,内收是唯一可能与扩展相结合,这使得一丝的内收及屈曲:允许收,以达到30-45117,18。横向内收是在一个水平面上向身体中线内侧运动的走向和整个胸部,手臂背面朝下移动上臂。真正的生长激素联合(简称为真正关节窝的一般运动)绑架是有限的只有901人。超出901,它是一个GH和ST接头之间的联合努力。事实上,在1801被绑架(开销手臂向上伸直),只有三分之二的运动发生在生长激素联合(对自己的301,901与ST合资,其余的601只发生在ST联合相结合)。此之间的肱部的肩胛骨运动的无缝结合被称为,作为肩区一般节奏19。扩展整顿联合角度的增加而导致的;移动上臂后方。运动能够产生未来的最大的收强度第二的实力水平是延长运动。扩展使用相同的肌肉群,内收运动。扩展名是略高于其对面的运动屈曲。的延伸,是密切相关收,有301和50117-19之间的范围有限。 真正的生长激素联合范围从01到901前屈运动本身,分隔成三个不同的阶段19。 内部(内侧)旋转周围骨向身体的中心纵轴的旋转运动;转动上臂向内。在内部内侧旋转的肩膀可以旋转90117。 外部(横向)转动,涉及到周围的骨远离身体中心的纵轴的旋转运动;上臂向外旋转。在外部横向旋转的肩膀,可旋转90118(图3)。3、设计初期参与脑力激荡和手工绘制的不同测试平台的概念的产生。从试验台的概念演变而来的设计,只是涵盖的一个概念试验台的肩膀覆盖延伸,再延伸和旋转,最后一个概念试验台的设计,可以涵盖所有范围内的议案在肩部的旋转。图4显示了最初的概念设计的CAD建模18-21。 肱骨头安装到安装的模块,其中有自由转3601,也能够走动半环形跑道的前面板上。肱骨远端将固定远端持有人的。轨道将被安装在两列,列内会有用于大型电机转动的轨道。因此,该试验台能够重新肩部复杂的运动。 以上图所示的概念试验台的主要组成部分。 4然后详细评估和重新设计。笔者无法推定初步设计,这将正确执行,但单独检查每个组件和创造的概念设计和评估的概念设计,它可以确保该组件将适合为目的。下面表1中的数字表明,其中的主要组成部分,每年创造的设计概念。4、概念设计 所有被评估的概念设计时使用的方法,例如将强调轨道安装的驱动器安装模块用来申请强制盂。在赛道上的概念进行有限元分析,以确保轨道不会弯曲和扭曲下的执行机构创建的负载。每个概念的轨道被限制和应用负载,负载保持常数为所有的轨道概念。概念轨道车轮配置,还详细评估中使用的有限元分析,以确保轨道和车轮设计的最好的配置选择。 转动半环形跑道的方法进行了评估,非常详细。有许多方法进行了研究,如电机驱动器和链,滑轮系统,驱动器驱动的议案和两个轨道配置(请参阅表1,第3行)。安装模块进行了评估申请武力盂,例如,驱动器数量,规格,权力,地位和附着点所需的驱动器上的主要重点。4.1 概念设计评价 以及有限元分析的概念设计,使用排名和权重的方法进行评估。表2和表3显示的最终设计的选择过程中使用的排名和权重的方法。用来得分的主要考虑因素,这是考虑到在设计过程中,排名和比重。 例如,易于制造,是一个需要考虑的因素,这是取得1-10的基础上,1是最重要的10个最重要的。表2中制造轻松得分为4的重要性。这是每个概念设计取得单独给总比分倍。主要考虑的总数,然后加在一起,这给了最适当的概念设计的基础上,主要考虑因素的重要性。一个突破的排名和权重的方法中使用的标准,详述如下。4.1.1 电机和驱动器的成本这是一个重要的考虑因素,因为驱动器和电机都比较昂贵,特别是考虑到,他们需要有一个变速,将需要进一步的电子设备,使用和监督他们。然而,他们的一项基本要求,所以在一个项目的成本5的重要性。高得分设备将使用少量的驱动器或电机和设备,这需要很多驱动器或电机得分较低。4.1.2 所使用的材料数量 这是定于2重要性。这是因为材料将被要求建立试验台,但过度的物质会增加整体成本的试验台。重量和制造,有自己的重要性,但也相对材料用量可能缓解。4.1.3 易于制造 这是4的重要性。这是因为它是重要的是能够制造流程,这是相当简单和成本效益的设备。这是可能更费时,更昂贵和难以掌握,因此需要受过专门训练的技术人员对制造工艺的首选。该项目的目标之一是能够建立内部技术的试验台。4.1.4 生产时间 制造时间为7的重要性。这是因为它是重要的研究小组设计和制造设备,并进行测试,以检索结果。有限元分析模型也正在建立,如果设备需要比有限元分析模型,反之亦然创建不再会有物理和理论结果比较没有办法。4.1.5 耐久性 耐久性为8的重要性。重要的是,当试验台是完整的,充分利用可采取由研究小组。如果设备不断被打破,由于建设质量差或部分因此,正确的设备,工艺和材料,必须在设计过程中采购,这将是令人失望的。4.1.6 整体重量设备的总重量为6的重要性。当设备的生产和组装可能需要不时动议。一个可以拆卸或者是轻量级的设备是非常重要的。每个组件的整体重量也很重要,例如轨道的重量。如果轨道是沉重的,这将导致需要电机转动的轨道上的应力和应变。这可能会导致更大的电机,从而影响其他组件将被要求要更大一些,因此使得整体设备较重,以适应电机试验台的整体规模。4.1.7 轨道上的重量 重上轨道,是一个特定的标准,这是为安装模块评估。要求是重量轻,安装模块。这是因为如果它是沉重的,将有问题的轨道设备。再次,它会影响整体重量和轨道的规模和水平的半环形轨道移动电机功率。在赛道上安装模块的重量是8集和重要性。4.1.8 用户友好 用户友好的重要性,收到了9。重要的是,该设备是容易的研究小组使用。如果该试验台是用户友好和易于使用,这将有助于他们迅速进行测试,有效,因此,结果将更为精确。4.1.9 成功率 被评为成功率在10的重要性。成功率是基于组件的能力,有效地开展工作,相比其他概念设备。它基本上是一个比较成功的任务,它需要开展的设备能力4.1.10 革新创新打进了8重要性。重要的是,该设备是创新,例如在安装模块的概念有一个专门放置电动机,从而减少了安装模块的大小和重量。另一个安装模块有多个驱动器,而合并后可以申请变量部队。另一个安装模块驱动器,它可以安装在不同的角度。创新的得分是根据具体的创新组件是如何有效和有益的试验台。4.2 轨道和车轮概念选择 车轮配置是很重要的,因为他们持有的轨道安装模块,并引导周围的轨道安装模块。后在每个细节的设计,概念设计5轮配置选择。 概念设计5有四个大轮子心惊肉跳半的圆形轨道,并允许安装模块,左右移动的轨道顺利。这条赛道是重量更轻的设计比其他轨道。当轨道被提交到这是用来检查一个给定的负载5表现出色的概念设计下变形的有限元分析。 其他概念轨测试了更多的负载才变形,但也较重,这是一个轨道是需要关注的是轻量级的压力,以减少所需的电机转动的轨道。轨道的整体重量,保持流动性的目的,这也将是一个优势。 5首歌曲,是最轻的概念与概念设计的设计,这也意味着,它需要较少的材料制造和简单的设计,相比其他概念设计也意味着它更容易制造。这两个属性的概念设计5将使这种设计更便宜,比其他设计制造。也被视为最容易制造的概念设计概念设计5。它可以使用不同的方法制造,即投资铸造达到所需的曲率,这将是稍微容易实现,这比其他更为复杂的概念设计的设计。 最主要的优势,拥有比其他概念设计概念设计5,关于机动能力,以半环形跑道周围安装模块。驱动轮的要求执行,此举是水平排列的轨道上来,而不是垂直对齐的其他设计光。这意味着,与导向轮安装在正确的轨道驱动轮安装模块和更稳定和可靠的,相比其他轨道设计时的轨道之间的压缩。4.3 车削弯曲曲目选择的方法 排名和权重表(表2),用于选择所需的其他概念设计,完成了试验台的选择。 排名和比重表的设计,每个设计审查的主要属性。每个弯曲的轨道转动的方法属性重要性排名,总分10分,10是最重要的和1最重要的。成功率是估计该设备的工作取得成功。这是排在10的重要性。至少重要的属性是关于重量打进2。这是因为虽然重量是重要的其他组件方面,即轨道和安装模块。转动的轨道的方法需要很沉重,因为这将是他安装模块的基础和使用锚试验台。体重的排名为1,因为该设备可能仍然需要在实验室不时提出的,所以它赢得了整体的重要性2。 所选择的设计概念设计2。这是因为整体得分最高的经常总也时考虑的重要性。整体需要建立这一机制的组成部分的成本看作是最便宜的。这是不包括构建框架,概念设计1了9分类别所需的材料。然而,当比较的概念设计2至3日,4日和5使用显着减少材料制造。因此,制造概念设计所需的时间也少2时相比,设计2,3和4。耐用性是一个主要的因素和概念设计1拿下4不佳,因为它并不被认为是其他设计耐用。检查后所有被选择的标准包括整体估计成功率和用户友好的概念设计2。4.4 安装模块的选择 安装模块的标准选择是比别人大,这主要是由于安装模块的复杂程度和类别,如体重的重要性。整体选择接近,但是概念设计3,最终以总比分为83和558的总排名和权重选择的设计。更重加权的标准之一是创新。在8日和创新,加权概念设计2 8分。得分很高,因为在安装模块的能力,以调整其执行机构。概念设计3也是一个强有力的候选人,作为安装的模块单元,因为它是位于分别从轨道安装模块的重量。但它会更难以适应的不同长度肱部如果安装模块是一个固定点,离轨道。4.5 最终设计概念选择 所有选定的概念设计的基础上的有限元分析结果,优点和缺点轨道和车轮的选择,并通过排名和权重的方法。图5显示了最终被选定的设计概念,轨道和车轮组合,转动半环形跑道和最终安装的模块设计方法。5、最终设计最后的概念设计,选定后,有一个大型的模型建立,以确保可以复制,预计议案的范围。那么最后的计算机辅助设计,全尺寸使用I-DEAS的三维CAD软件创建工程图纸后创建和规模模型建立的计算机模型辅助决定,1801半环形赛道不会允许由于安装模块的大小,不会让头中心点的全方位运动腐殖质达到1801半环形跑道的两端。允许肱骨头安装到安装模块,实现1801年和1801年的轨道之外增加到3001图所示。 7。这允许更大范围内的议案,并解决了这个问题。垂直的轨道上进行同样的修改,但它是增加轨道的顶端,而不是由拦截远端持有人引起问题,如果它延长轨道的底部。 每个组件的制造过程中,考虑到随着材料的选择。创建一个全法案的材料和零件清单,包含在试验台的组成部分。无花果。 6日和7显示完成建模肩关节试验台(图8)的意见。6、讨论 肩部受伤和肩部的问题是一种常见的发生,因为肩关节是最良好的使用在人体关节之一。人们甚至没有想到它使用自己的肩膀每天,但偶尔会出现问题。用肩膀的问题往往因磨损,并能增加运动或活动,其中的肩膀被强调13由于随着年龄的增加。 重要的是,继续研究力量的肩膀上,在运动的不同范围和新的肩膀假肢设计。这项重要的研究帮助人们在未来可能患有肩部受伤,并可能有助于他们更快恢复,并可能防止未来的问题15。 这是为什么肩关节试验台是重要的。这将允许研究人员更好地理解不同范围的肩膀上,在特定的盂的议案有一个力量型的。这个信息和测试平台,将有助于研究人员开发新的假肢设备进行修理或更换,特别是肱骨骨头,。 肩关节试验台的设计,主要功能是适用于部队在任何范围内的议案盂。简要寻找身体的其他关节后,它被认为与轻微的修改,该试验台可用于适用于部队在任何范围内的议案头股骨骨股骨关节肱骨关节相比,具有以下的可操作性。肩关节试验台可涵盖任何议案,髋关节可以执行的范围。 本文涵盖了正在开展的整体研究的一部分。以及试验台的设计和制造将用于开发和测试未来的假肢设备,有限元模型将得到发展。它希望,通过开发有限元模型,这将被用来模拟在肩部的力量和运动范围,该软件还可以被用于从试验台验证结果的一种手段。这将是一个重大的优势,以团队的研究人员参与,会有两种方法证明了新的假肢设备和正在进行的肩膀研究的完整性。 在1999/2000年在英格兰有3866肩置换手术开展。也有69,600髋关节置换业务在同年进行。有较大,在英国进行的臀部操作,可以修改,因此,如果这个试验台测试髋关节,以及肩关节,肩部和髋关节假体的新技术的创新方面,这可能是一个真正的优势。这是因为相结合,在1999/2000年有73466髋关节和肩关节置换在英国进行的。在英国开展的业务量将是更大的数额进行了全世界将是惊人的18,19,22-24。7、结论该试验台的设计在肩部的运动范围内的所有移动;内收,外展,延伸,前屈,内部(内侧)旋转,外部(横向)转动。 该试验台将能够适用于不同程度的运动力量,盂。它可能会在未来进行修改,以包括髋关节,这将是一个优势,因为有更多的髋关节比肩关节置换18,19在英国进行的替代。该试验台制造合适的材料,如铝,以保持轨道的重量和安装模块和钢有可能保持钻机的成本降下来。该试验台将用于学生,研究员和讲师在肩部复杂/髋关节和新设备的设计,开发和测试新的假肢使用的设备,用于修补断骨肩/臀部在不断的努力,以推进在这方面的知识和技术。 该试验台是仍在开发中,在有限元分析模型,这也将被用来模拟肩部的力量和议案的同时。8、致谢作者想感谢他们的意见和援助距离阿萨纳西Klonis先生保罗麦格拉思博士和蒂赛德大学的理查德麦基先生,博士和阿马尔雷根顾问骨科外科医生詹姆斯库克医院,极普通的完成这项研究。9、参考文献附录Manufacture of a mechanical test rig to simulate the movements of forces within the shouldera b s t r a c tThe shoulder complex, also known as the glenohumeral joint is the most manoeuvrable and one of the most well used joints of the human body. Over time problems can occur with the glenohumeral joint and surrounding muscles, cartilage, tendons and ligaments caused by ageing or by over stressing the shoulder complex. This work examines the design of a new innovative glenohumeral test rig. The test rig was required to imitate the movement of the humerus in the human body and replicate all the ranges of motion, which it can move in when combined with the relevant bones, muscles, ligaments and tendons in the shoulder complex. A variable force also had to be applied to the glenoid in all ranges of motion. Research had to be undertaken in the ranges of motion of the shoulder complex and the forces acting on the glenoid. Concept designs were initially created to mimic specific ranges of motion; adduction, flexion, internal (medial) and external (lateral) rotation for example. The concepts were evolved and combined to develop a test rig that would replicate any axial movement of the shoulder. Research determined the most appropriate manufacturing processes and materials so that the test rig could be manufactured in the material laboratories.Keywords: Glenohumeral 、Shoulder 、Test rig Forces Design Manufacture1. IntroductionThe Glenohumeral joint is the most manoeuvrable and one of the most well used joints in the body. It can become damaged due to sporting activities or through general wear and tear which can result in serious problems for the person with the injury. Surgeons, engineers and researchers are continually investigating methods of improving the quality of life of patients with shoulder problems and are developing methods of replacing, repairing and reducing the problems that may occur to the shoulder joint 112. This research was carried out so that further develop-ments into shoulder injury prevention, replacement and repair can take place via the design of a new and innovative glenohumeral test rig. The test rig will allow researchers to carry out tests on prosthetic humerus bones and allow them to add prosthetic muscles and apply forces to glenohumeral joint and make advances in the technology and knowledge in this field 13,14. Fig. 1 above shows the major bones and muscles that make up the shoulder complex. The humerus is the main bone of the shoulder of which the shoulder test rig is designed around. As people age the humerus can become worn and prone to osteoarthritis. This causes the cartilage, used to distribute stressand loads on the shoulder, to deteriorate. In severe cases the humeral head must be replaced with a prosthetic device 15. This test rig is designed to simulate the forces acting on the glenoid in any range of motion so that new prosthetic devices can be designed and tested.2. The shoulder complex and ranges of motionThere are six main motions that the shoulder can perform these are known as adduction, abduction, extension, flexion, internal (medial) and external (lateral) rotation. Each of these movements is restricted by ligaments and moved by the muscles of the shoulder complex. The shoulder has the greatest range of motion of any joint in the human body 1719 ( Fig. 2).Adductionabsolute adduction is mechanically impossible because of the presence of the trunk. Starting from a reference point position, adduction is only possible when combined with extension; this allows a trace of adduction and flexion: which allows adduction to reach 30451 17,18. Transverse adduction is the medial movement toward the midline of the body in a horizontal plane; moving the upper arm toward and across the chest with the back of the arm facing down.True abduction of the GH joint (referred to as true Glenohum-eral motion) is limited to only 901. Beyond 901, it is a combined effort between both the GH and ST joints. In fact, at 1801 abduction (arm straight up overhead), only two-thirds of themovement occurred at the GH joint (301 on its own, 901 combined with the ST joint and the remaining 601 exclusively occurring at the ST joint). This seamless combination of movements between the humerous and the scapula is referred to as the scapulohum-eral rhythm 19.Collar BoneDeltoid1st RibRotator CuffMusclesunderneathScapulaDeltoidHumerusTricepsPectoralisBicepmajorFig. 1. Some of the major bones and muscles that make up the shoulder complex 1316.Fig. 2. The range of motion that the shoulder complex possesses 17.Fig. 3. The range of motion of the shoulder.Extension is straightening the joint resulting in an increase of angle; moving the upper arm down to the rear. The movement capable of producing the next greatest level of strength second to the adduction strength is the extension movement. Extension uses the same muscle groups as the movement of adduction. Extension is slightly stronger than its opposite movement flexion. Extension, is closely associated with adduction, it has a limited range of between 301 and 501 1719.True forward flexion at the GH joint ranges from 01 to 901, with the movement itself separated into three distinct phases 19.Internal (Medial) rotation is the rotary movement around the longitudinal axis of the bone toward the centre of the body; turning the upper arm inward. In internal medial rotation the shoulder can rotate 901 17.External (lateral) rotation involves the rotary movement around the longitudinal axis of the bone away from the centre of the body; turning the upper arm outward. In external lateral rotation the shoulder can rotate 901 18 ( Fig. 3).3. DesignThe initial stage involved brain storming and the generation of hand drawn concepts of the different test rigs. The designs evolved from a test rig concept that simply covered rotation of the shoulder to a concept test rig that covered extension, then extension and rotation, and finally a concept test rig was designed that could cover all the ranges of motion in the shoulder. Fig. 4 shows the initial concept design modelled in CAD 1821.The head of the humerus mounts to the front plate of the mounting module which has the freedom to turn 3601 and also the ability to move around the semi circular track. The distal end of the humerus bone would be fixed to the distal end holder. The track will be mounted to two columns, inside the columns there will be large motors used to turn the track. Therefore the test rig is able to recreate the movement of the shoulder complex.The major components of the concept test rig shown above in Fig. 4 were then evaluated and re-designed in detail. The authors could not presume that this initial design would perform correctly but by examining each component individually and creating concepts designs and evaluating those concept designs it could be ensured that the component would be fit for purpose. The figures below in show the concept designs which were created for each of the major components.4. Concept designsThe concept designs were all evaluated using a number of methods for example the track would be stressed when the actuators mounted to the mounting module are used to apply force to the glenoid. Finite-element analysis was carried out on the track concepts to ensure that the tracks would not bend and distort under the loads created by the actuators. Each concept track was restrained and a load applied, the load was kept constant for all of the track concepts. The wheel configurations of the concept tracks were also evaluated in detail using FEA to ensure that the best possible configuration of the track and wheel designs were selected.The methods for turning the semi circular track were evaluated in great detail. Many methods were examined such as motor and chain drives, pulley systems, actuator driven motion and a two track configuration (please see Table 1, row 3). The mounting modules were evaluated with the main emphases on the actuators required to apply the force to the glenoid, for example, actuator numbers, sizes, power, position and attachment points.4.1. Concept design evaluationAs well as the finite-element analysis the concept designs were evaluated using a ranking and weighting method. show the ranking and weighting method used during the selection of the final designs. Ranking and weighting is used to score the main considerations, which are taken into account, during the design process.For example, ease of manufacture is a factor to consider, this was scored on a 110 basis, with 1 being least important and 10 most important. In ease of manufacture was scored as an importance of 4. This was then times by the score that each concept design achieved individually to give a total. The totals of the main considerations were then added together and this gave the most appropriate concept design based on the importance of the main considerations. A break down of the criteria used in the ranking and weighting method is detailed below.4.1.1. Cost of motors and actuatorsThis is an important factor to consider because the actuators and motors are relatively expensive, especially considering that they need to have a variable speed and will need further electronics to use and monitor them. However they are an essential requirement so the cost of the items was set at animportance of 5. A high scoring device will use minimal amount of actuators or motors and a device which requires many actuators or motors would be lower scoring.4.1.2. Amount of material usedThis was set at an importance of 2. This is because material will be required to build the test rig but excessive material will increase the overall cost of the test rig. Weight and possibly ease of manufacture which have there own importance but are also relative to amount of material used.4.1.3. Ease of manufactureThis was set at an importance of 4. This is because it is important to be able to manufacture the device with processes that are reasonably simple and cost effective. This is to be preferred over manufacturing processes that may be more time consuming, more costly and difficult to master and which would thus require specially trained technicians. One aim with the project was to be able to build the test rig with in house technology.4.1.4. Time taken to manufactureTime taken to manufacture was set an importance of 7. This was because it is important for the research team to design and manufacture the device and carry out tests to retrieve results. A finite-element analysis model is also being created and if the device takes longer than the FEA model or vice versa to create there will be no means of comparing physical and theoretical results.4.1.5. DurabilityDurability was set an importance of 8. It is important that when the test rig is complete that full advantage can be taken by the research team. It will be disappointing if the device is continually breaking down due to poor build quality or parts hence the correct equipment, process and material must be sourced during the design process4.1.6. Overall weightThe overall weight of the device was set an importance of 6. When the device is manufactured and assembled it may be required to be moved from time to time. A device that can be disassembled or be lightweight is important. Overall weight of each individual component is also important for example; the weight of the track. If the track is heavy this will cause stress and strain on the motors required to turn the track. This could result in a bigger motor which affects the overall size of the test rig as other components will be required to be larger to accommodate the motor hence making the overall device heavier.4.1.7. Weight on trackWeight on track is a specific criterion which was evaluated for the mounting module. The mounting module is required to be light weight. This is because if it was heavy there would be problems in holding the device to the track. Again it would affect the overall weight of the track and the size and power of the motor required to move the horizontal semi circular track. The weight of the mounting module on the track was set and importance of 8.4.1.8. User friendlinessUser friendliness received an importance of 9. It is important that the device is easy for the research team to use. If the test rig is user friendly and easy to use it will aid them to carry out tests quickly, effectively and therefore results will be more precise.4.1.9. Success rateSuccess rate was rated at an importance of 10. Success rate is based on the components ability to work effectively when compared to the other concept devices. It is basically a comparison of the devices ability to succeed at the task it is required to carry out.4.1.10. InnovationInnovation scored an importance of 8. It is important that the device is innovative, for example the mounting module concepts had a specifically placed motor, which reduced the size and weight of the
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