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工程机械动态仿真

  1. Which statement about DOF is wrong

  2. A:The minimum number of parameters (motion, coordinates, temperatures, etc.) required to define the position and state of any entity completely in space is known as degrees of freedom. B:The number of DOFs depends on the type of element and the type of analysis C:The total DOFs for a given mesh model is not equal to the number of nodes multiplied by the number of DOFs per node. D:DOF is very important in FEA, it is used for the individual calculation points.
    答案:in agreement withAI参考:根据选项的内容,关于DOF表述错误的是D选项:DOF在FEA中非常重要,用于单独的计算点。实际上,DOF(自由度)是有限元分析中的一个重要概念,它描述了物体在空间中的位置和状态的确定性,需要最小的参数(运动、坐标、温度等)来确定。因此,DOF不仅在单独的计算点上重要,而且在整个分析过程中都起着关键作用。因此,答案为(D):DOF是用于单独的计算点。'
  3. Animation of dynamic models enables people to observe the system, and what is the best benefit

  4. A:Overall data B:all the degrees of freedom C:3D maps of simulated data D:2D maps of simulated data
    答案:stateAI参考:正确选项是【C:3D maps of simulated data】。动画动态模型可以让人们观察系统,而最好的好处是3D地图模拟数据,能够更直观地展示系统的动态变化,有助于更好地理解系统。选项A、B、D虽然也具有一定的意义,但不如C选项更直观和有用。'
  5. What’s the last step in the basics of construction machinery design procedure?

  6. A:Analytical process B:Prototype development & testing C:Problem definition D:Brainstorming process
    答案:ss
  7. Steps in the Solution of Nonlinear Finite Element Analysis

  8. A:Linearization→State Determination→→Residual Calculation→Convergence Check→Solution B:State Determination→Convergence Check→Residual Calculation→Linearization→Solution C:State Determination→→Residual Calculation→Convergence Check→Linearization→Solution D:Convergence Check→State Determination→→Residual Calculation→Linearization→Solution
    AI参考:正确选项是【B:State Determination→Convergence Check→Residual Calculation→Linearization→Solution】。根据题目中的描述,解决问题的步骤应该是先进行状态确定(State Determination),然后进行收敛检查(Convergence Check),接着进行残量计算(Residual Calculation),再进行线性化(Linearization),最后得到解决方案(Solution)。因此,选项B是正确的。选项A和C的顺序错误,选项D缺少了状态确定这一步骤。'
  9. The best way to create a virtual scene is to use specialized software. What is the software

  10. A:V-Realm Builder B:3D CAD C:SoliderWorks D:Matlab
    答案:V-Realm Builder
  11. How many steps does it take to create a virtual scene for a cube

  12. A:15 B:11 C:9 D:10
    答案:4AI参考:正确选项是 C:9。根据问题描述,需要创建3D立方体的虚拟场景,可以推测这是一个涉及到建模和渲染的复杂任务。在创建虚拟场景时,通常需要设计模型、添加灯光、调整材质、设置相机等步骤,这些步骤都需要一定的时间和精力。因此,选项C 9是最符合实际情况的答案。选项A、B、D都与实际情况不符,因此不是正确答案。'
  13. Before building the virtual scene, where is the center of all objects by default

  14. A:(0,0,0) B:(0,1,0) C:(0,0,1) D:(1,0,0)
    AI参考:正确选项是【A:(0,0,0)】。在构建虚拟场景之前,所有物体的默认中心点是(0,0,0),即原点。这是因为在3D建模中,物体的中心通常被视为其重心,而重心通常位于物体的几何中心。因此,所有物体在默认情况下都会以原点为中心。'
  15. Function of chain module

  16. A:Determine the design and behavior of the belt system B:predict the impact of the design and behavior of chain systems C:predict the impact of the design and behavior of belt systems D:Determine the design and behavior of the chain system

  17. In VRML, the x-axis is the horizontal line of the screen, pointing to the right. The y-axis is vertical. What about the Z-axis

  18. A:A plane parallel to the screen and facing away from the user B:A plane perpendicular to the screen and pointing to the user C:A plane perpendicular to the screen and facing away from the user D:A plane parallel to the screen and pointing to the user
    AI参考:正确选项是【C:A plane perpendicular to the screen and facing away from the user 】。在VRML中,x轴是屏幕的水平线,指向右边,y轴是垂直的。对于Z轴,它与屏幕垂直并指向远离用户的方向,即选项C。其他选项都与VRML的坐标系设定不符。'
  19. Which of the following modules do not exist in the mechanical subsystem?

  20. A:Fluid mechanics analysis module B:Bearing module C:Electric motor module D:Cam module

  21. ____ is an information transmission between humans and other machines.

  22. A:mobile mechanism B:communication C:processing D:sensing
    AI参考:正确答案是B:communication。本题考察了对于词义的理解。选项A“mobile mechanism”是指可移动的机械装置,选项C“processing”是指处理,选项D“sensing”是指感觉或感应,它们都不能正确描述信息的传播。而“communication”一词,既可以指人与人之间的信息传递,也可以指人与机器之间的信息传递,因此是最符合题意的选项。所以答案为B。'
  23. How many internal parameters are there in the changing matrix?

  24. A:11 B:4 C:5 D:6

  25. What is the reason for the widespread use of crawler machines

  26. A:Having a much greater ground contact area than wheeled equipment B:A large number of contact elements C:Design can be done graphically D:Relatively mature technology
    AI参考:正确答案是【A:Having a much greater ground contact area than wheeled equipment】。根据题干所给出的选项,爬行机具有广泛的用途,主要原因是它比轮式设备具有更大的地面接触面积。其他选项中,B选项“大量的接触元素”与广泛使用爬行机的原因无关;C选项“可以图形化设计”也与广泛使用爬行机的原因无关;D选项“相对成熟的技术”虽然也是爬行机得以广泛应用的原因之一,但是并非主要原因。因此,根据题干所给出的信息,可以得出正确答案是A选项,即爬行机具有比轮式设备更大的地面接触面积。'
  27. What is the reason of cameras capture images with the characteristic that not all the objects are in focus?

  28. A:Limited by the depth of field B:The camera is not focusing properly C:The shooting range is too wide D:There are too many objects in the depth of field
    AI参考:正确选项是【Limited by the depth of field】。原文中提到相机拍摄图像的特征是并非所有物体都清晰聚焦,这通常是由于景深(depth of field)所限导致的。在摄影中,景深是指从镜头前缘到最近清晰对焦物体,再到最远模糊对焦物体之间的范围。如果景深较浅,则意味着在拍摄时,某些物体可能会因为距离镜头太近或太远而无法完全清晰聚焦。因此,选项A“Limited by the depth of field”是符合原文意思的正确答案。选项B、C、D在原文中没有提到或与问题无关。'
  29. The advanced three-dimensional contact method greatly improves the gear's___

  30. A:hardness B:Plasticity C:flexibility D:strength

  31. Which mechanism can produce almost any type of motion of the driven element with continuous motion of the drive element

  32. A:Slider-crank mechanism, B:Cam Mechanism C:tappet D:The four bar linkage
    AI参考:正确答案是B:Cam Mechanism。题目中描述的机制能够产生驱动元件连续运动时几乎任何类型的被驱动元件的运动,而B选项中的凸轮机构恰好符合这一描述,因为它可以通过改变凸轮的形状和位置来控制从动件的运动轨迹,因此答案为B。其他选项中,滑动-曲柄机构、顶杆和四杆机构都不能产生连续运动时几乎任何类型的被驱动元件的运动。'
  33. What commands need to be entered in the MatLab command window to check whether the virtual reality toolbox is installed

  34. A:vr-check B:vrinstall -check C:vr-install D:vrinstall-success
    AI参考:正确选项是 C:vr-install。在MatLab命令窗口中,可以使用“vr-install”命令来检查虚拟现实工具箱是否已安装。选项A和B中的“vr-check”和“vrinstall -check”命令是错误的,因为它们并不是有效的MatLab命令。选项D中的“vrinstall-success”也是错误的,因为它包含了额外的字符“-success”。因此,正确答案是C:vr-install。'
  35. HIL systems are used for testing

  36. A:Software B:Robot C:Hardware D:Controllers
    AI参考:正确选项是【C:Hardware】。根据问题描述,HIL systems用于测试,而选项中只有Hardware(硬件)与测试有关,因此C选项是正确答案。软件、机器人和控制器都与测试无关。'
  37. What command can you type in the MatLab command window to reinstall the VRML viewer or editor?

  38. A:vrinstall -success B:vrinstall C:vrinstall -install D:install
    AI参考:正确答案是【B:vrinstall】。在MatLab命令窗口中,要重新安装VRML viewer或编辑器,可以使用“vrinstall”命令。该命令的参数不需指定,可以直接在窗口中输入。所以选项B是正确的。选项A中的“vrinstall -success”可能是错误的输入,因为“success”并不是vrinstall命令的参数。选项C中的“vrinstall -install”与选项B类似,但“install”并不是vrinstall命令的参数。选项D中的“install”也不是vrinstall命令的参数。因此,正确答案是B:vrinstall。'
  39. ____ is a necessary mechanism in automated vehicles, it can manipulate the vehicle to turn by the desired steering angle.

  40. A:lubrication system B:transmission system C:steering system D:execution system
    AI参考:正确选项是【C:steering system】。在自动驾驶汽车中,转向系统是一个必要的机制,它可以通过调整所需的转向角度来操纵车辆进行转向。润滑系统、变速器和执行系统虽然在车辆中也有作用,但它们与题目描述不符。因此,答案为C。'
  41. Which arre examples of multibody systems in modern literature

  42. A:robotics B:space structures C:biomechanical systems D:vehicles
    AI参考:正确选项是【C:biomechanical systems】。题目中提到“multibody systems”,而选项中只有biomechanical systems符合这个描述,因为biomechanical systems是指生物力学系统,通常涉及到多个生物体的相互作用和运动,与题目中的multibody systems相符。其他选项robotics(机器人)、space structures(空间结构)和vehicles(车辆)虽然也涉及到多个物体的相互作用,但与题目中的“multibody systems”不完全相符。因此,C选项是正确答案。'
  43. Forces in mechanical systems can be categorized as()

  44. A:Internal force B:Gravitation force C:External force D:Joint force
    AI参考:正确选项是【C:External force】。机械系统中的力可以分为内部力、重力、外部力和关节力等。其中,外部力是指由系统外部施加的力,如摩擦力、推力、拉力等,它们对系统运动的影响是直接的。因此,选项C“外部力”是正确答案。而其他选项如内部力、重力、关节力等,虽然也是机械系统中的力,但它们的影响通常需要通过外部力来体现。'
  45. What are the features of the ATV?

  46. A:Set subsystem B:Simulating tracked vehicles on both hard and soft soils C:Modeling on both hard and soft soils D:Quick replacement subsystem
    AI参考:通过对题目提供的信息进行分析,该题目是要求选择ATV的特点,因此需要对选项进行分析。选项A:“Set subsystem”与ATV无关,因此排除。选项B:“Simulating tracked vehicles on both hard and soft soils”描述的是ATV的一个特点,即它可以在硬土和软土上模拟履带式车辆的行为。选项C:“Modeling on both hard and soft soils”与选项B类似,也描述了ATV的一个特点,即它可以在硬土和软土上进行建模。选项D:“Quick replacement subsystem”与ATV无关,因此排除。综上所述,选项B和C都是描述ATV的特点的正确选项。因此,正确选项为B和C。'
  47. A few of the popular CAD tools for professional engineers include

  48. A:UG B:Pro/Engineer C:SolidWorks D:AutoCAD
    AI参考:正确选项是【D:AutoCAD】。AutoCAD是一款广泛应用于工程设计和绘图领域的计算机辅助设计软件,它广泛应用于建筑、机械、电子、航空等领域。它提供了强大的绘图和编辑工具,以及各种用于创建和编辑三维模型的功能。因此,选项D是正确答案。其他选项UG、Pro/Engineer和SolidWorks也都是流行的CAD工具,但它们的使用范围和功能可能不如AutoCAD广泛和强大。'
  49. Database technology include().

  50. A:Mysql B:c# C:SQL server D:python
    AI参考:正确选项是【C:SQL server】。数据库技术包括SQL Server(C选项)、MySQL(A选项)、Oracle、DB2等,C#(B选项)和Python(D选项)虽然与数据库相关,但不是数据库技术。'
  51. Which applications are in CAE domains

  52. A:Computational fluid dynamics simulations B:Structural simulation C:AutoCAD D:Motion simulation
    AI参考:正确选项是【B:Structural simulation】。问题中询问的是哪些应用属于CAE领域,而CAE是指计算机辅助工程,通常包括结构分析、流体动力学分析、热分析、电磁分析等不同领域。因此,选项B“结构仿真”属于CAE领域。而选项A是流体动力学仿真,选项C是绘图软件,选项D是运动仿真,都不属于CAE领域。'
  53. The four bar linkage is used in many different devices. A few examples are

  54. A:loaders B:bicycles C:compressors D:oil well pumps

  55. HIL system's main framework include ().

  56. A:Plant B:HIL simulator C:Control system D:FPGA

  57. The advantages of commercial HIL tools include ():

  58. A:Cheap B:Easy to build models. C:Hard to use. D:Synchronize with the real machine.

  59. What are the benefits of the HIL technology of the Controllab company ()?

  60. A:Increase Safety B:Save Money C:Enhance Quality D:Save Time

  61. Which is the latest trend for our designers ()?

  62. A:Rapid Concurrent Design B:Unmanned Construction Requirements C:Virtual Reality D:Machine Vision
    AI参考:正确选项是【C:Virtual Reality】。根据问题描述,设计师的最新趋势应该是一种能够实现快速并行设计、无人化施工要求和机器视觉的技术。Rapid Concurrent Design和Unmanned Construction Requirements与问题描述不符,而Machine Vision虽然与设计有关,但并不是最新的趋势。Virtual Reality是一种能够模拟现实环境的技术,可以用于设计、展示和交流,因此是最符合问题描述的选项。因此,正确答案是C:Virtual Reality。'
  63. What are virtual scenes usually made of

  64. A:People and objects B:object(s) you want to animate with simulation data C:background that the object(s) runs in D:Coordinate system and environment
    AI参考:正确选项是【B:object(s) you want to animate with simulation data】。虚拟场景通常由你想要用模拟数据动画化的物体构成。选项A中的人和物体不是虚拟场景的构成元素;选项C中的背景也不是虚拟场景的构成元素;选项D中的坐标系统和环境虽然与虚拟场景有关,但不是虚拟场景的主要构成元素。而选项B中的物体是由你想要动画化的对象组成,通常这些对象是由模拟数据生成的,这与虚拟场景的构成相符合。'
  65. Which statements about the Experimental Method is 对?

  66. A:Time consuming and expensive set-up B:Applicable only if the physical prototype is available C:Results must be validated with many replicates D:Actual measurement
    AI参考:正确选项为C:Results must be validated with many replicates。实验方法需要多次重复验证结果,这是实验方法的一个重要特点。选项A和B都描述了实验方法的缺点或限制,选项D描述的是实际测量,与实验方法无关。因此,选项C是符合实验方法特点的正确选项。'
  67. The execution mechanism of the autonomous vehicle includes ____.

  68. A:steering wheel B:a robot arm C:a walking mechanism D:motor
    AI参考:正确选项为【C:a walking mechanism】。自动驾驶汽车的执行机制包括控制车辆行驶的机构,如轮式机器人(walking mechanism)和机械臂(robot arm)。其中,步行机制能够让自动驾驶汽车像人类一样自主行走,从而避免拥堵和停车等问题。而方向盘(steering wheel)通常由人类驾驶员控制,与自动驾驶汽车的自主行驶机制不符。电机(motor)是驱动车辆前进的动力装置,虽然重要,但不是执行机制的一部分。因此,选项C是正确答案。'
  69. What is the three principal steps of kinematic analysis

  70. A:determine all the required displacement variables B:differentiate the kinematic relationships C:velocity analysis D:acceleration analysis
    AI参考:正确选项是【A:determine all the required displacement variables 】。原文中提到“What is the three principal steps of kinematic analysis”,根据上下文可以推断出,选项A“确定所有所需的位置变量”是正确答案。选项B、C、D都提到了分析的步骤,但是它们都只涉及到了分析的一部分,不符合原文描述。因此,正确选项为A。'
  71. dSPACE is one of the leading providers of HIL test systems.

  72. A:错 B:对
    AI参考:答案是B:对。根据题目中的信息,dSPACE是一家领先的热力学集成测试系统提供商,因此选项B“对”是正确的。选项A“错”是不正确的。'
  73. The FEM only makes calculations at a limited number of points and then interpolates the results for the entire domain (surface or volume)

  74. A:错 B:对
    AI参考:正确答案是B:对。根据题干描述,有限元素法(FEM)只在有限数量的点上进行计算,然后将结果插值到整个域(表面或体积)上,因此选项B“对”是正确的。选项A“错”则与题干描述不符。'
  75. In a mechanical system, the bodies in a mechanical system are not free to have arbitrary displacements because they are connected by joints or force elements.

  76. A:对 B:错

  77. We can use Maplesim’s code generation feature to easily deploy solutions to other programming languages.

  78. A:错 B:对
    AI参考:正确答案是B:对。根据问题描述,我们使用Maplesim的代码生成功能可以轻松地将解决方案部署到其他编程语言中。因此,选项B“对”是正确的。选项A“错”与此描述不符。'
  79. It is unnecessary for road maintenance machinery to detect road disease for repairs.

  80. A:错 B:对
    AI参考:正确答案是B:对。句子中提到“公路维护机械没有必要检测公路疾病进行修理”,所以答案是B,表示“对”。这句话的意思是公路维护机械不需要检测公路疾病进行修理,所以不需要做这件事情。'
  81. The mechanical arm of the excavator includes the rotating joint and the prismatic joint.

  82. A:错 B:对

  83. MapleSim is the combination of Modelica, an open, process-oriented, system-level modeling language.

  84. A:对 B:错
    AI参考:正确答案是B:错。MapleSim是一个物理仿真软件,它不是Modelica语言与其它建模语言的结合体。因此,该陈述是错误的。'
  85. As a cross-platform numerical analysis and data processing library, ALGLIB supports c++, java, and python.

  86. A:对 B:错

  87. Because of the lacking of availability of large complex wind turbines, it is hard to test and do an experiment of the controllers, so, authors used the HIL simulators to do the testing of its sophisticated real-time control algorithms in its controller, with the high-resolution dynamic models.

  88. A:错 B:对
    AI参考:答案:B:对。根据上下文,由于缺乏大型复杂的风力涡轮机的可用性,很难对控制器进行测试和实验,因此作者使用了硬件在环仿真器(HIL)来在其控制器中对复杂的实时控制算法进行测试,并使用高分辨率动态模型。因此,该陈述是正确的,答案为B。'
  89. Using HIL simulation, you can conduct tests without harming people or equipment during all stages of the design.

  90. A:错 B:对

  91. The most commonly used camera imaging model is the pinhole model

  92. A:错 B:对
    AI参考:正确答案是B:对。针孔模型是最常用的相机成像模型之一,因此选项B是正确的。'
  93. As to the real engineering application, the ethernet bus is worse than the USB bus in speed and data safety.

  94. A:对 B:错
    AI参考:。答案B是正确的,因为以太网总线相对于USB总线在速度和数据安全性方面表现较差。在真实的工程应用中,以太网总线通常用于局域网连接,而USB总线则被广泛用于数据传输和设备连接,尤其是在个人电脑和移动设备中。因此,从速度和数据安全性的角度考虑,以太网总线确实不如USB总线。'
  95. We can use DotNumerics to solve an initial-value problem for stiff ordinary differential equations.

  96. A:对 B:错

  97. Controllab was founded in 1995 as a spin-off of the Eindhoven University of Technology by young and enthusiastic control engineers.

  98. A:对 B:错

  99. Adams Machinery contains multiple modeling productivity modules which enable users to create common machinery components much more rapidly

  100. A:错 B:对
    AI参考:【判断题】正确答案是B:对。根据问题描述,Adams Machinery软件包含了多个建模生产率模块,这些模块可以让用户更快速地创建常见的机械部件。因此,答案是B,表示肯定。'

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