【填空题】
22128.___轨迹规划与控制就是按时间规划和控制手部或工具中心走过的空间路径。
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22129.___结构型传感器的结构比起物性型传感器的结构相对简单。
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22130.___按钮开关也可作为一种低压开关,通过手动操作完成主电路的接通和分断。
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22131.___电感式传感器只能检测与铁磁性物体间的距离。
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22132.___电动机上的绝对光轴编码器是用来检测运动加速度的。
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22133.___由电阻应变片组成电桥可以构成测量重量的传感器。
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22134.___借助于电磁波和声波可以构成接触型传感器。
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22135.___传感器的精度是反映传感器输出信号与输入信号之间的线性程度。
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22136.___因为人体电阻为 800Ω,所以 36V 工频电压能绝对保证人身安全。
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22137.___传感器的重复性是指在其输入信号按同一方式进行全量程连续多次测量时,相应测试结果的变化程度。
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22138.___相对而言,红外测距仪测距的准确度不高,测量距离相对较短,但由于价格低, 也很适合于机器人应用。
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22139.___机器视觉是指用计算机实现人的视觉功能——对客观世界的三维场景的感知、识别和理解。
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22140.___控制系统中涉及传感技术、驱动技术、控制理论和控制算法等。
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22141.___三自由度手腕能使手部取得空间任意姿态。
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22142.___分辨率指机器人每根轴能够实现的最小移动距离或最小转动角度。
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22143.___机器人的分辨率和精度之间不一定相关联。
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22144.___机器人的自由度数大于关节数目。
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22145.___数控机床运行中操作者主要是通过听,闻,看,摸等直接感觉对电气和机械系统进行监视。
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22146.___和人长的很像的机器才能称为机器人。
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22147.___谐波减速机的名称来源是因为刚轮齿圈上任一点的径向位移呈近似于余弦波形的变化。
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22148.___由电阻应变片组成电桥可以构成测量重量的传感器。
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22149.___激光测距仪可以进行散装物料重量的检测。
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22150.___机电一体化系统的主要功能就是对输入的物质按照要求进行处理,输出具有所需特性的物质。
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22151.___系统论、信息论、控制论是机电一体化技术的理论基础,是机电一体化技术的方法论。
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22152.___信息处理技术是指在机电一体化产品工作过程中,与工作过程各种参数和状态以及自动控制有关的信息输入、识别、变换、运算、存储、输出和决策分析等技术。
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22153.___自动控制是在人直接参与的情况下,通过控制器使被控对象或过程自动地按照预定的规律运行。
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22154.___产品的组成零部件和装配精度高,系统的精度一定就高。
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22155.___为减少机械传动部件的扭矩反馈对电机动态性能的影响,机械传动系统的基本固有频率应低于电气驱动部件的固有频率的 2~3 倍,同时,传动系统的固有频率应接近控制系统的工作频率,以免系统产生振荡而失去稳定性。
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22156.___传动机构的转动惯量取决于机构中各部件的质量和转速。
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22157.___在闭环系统中,因齿轮副的啮合间隙而造成的传动死区能使系统以 6~10 倍的间隙角产生低频振荡,采用消隙装置,以提高传动精度和系统稳定性。
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22158.___进行机械系统结构设计时,由于阻尼对系统的精度和快速响应性均产生不利的影响,因此机械系统的阻尼比ξ取值越小越好。
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22159.___滚珠丝杠垂直传动时,必须在系统中附加自锁或制动装置。
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22160.___采用偏心轴套调整法对齿轮传动的侧隙进行调整,结构简单,且可以自动补偿侧
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22161.___采用虚拟样机代替物理样机对产品进行创新设计测试和评估,延长了产品开发周
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22162.___机电一体化系统是以微电子技术为主体、以机械部分为核心,强调各种技术的协同和集成的综合性技术。
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22163.___机电一体化系统的机械系统与一般的机械系统相比,应具有高精度、良好的稳定性、快速响应性的特性。
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22164.___双螺母消除轴向间隙的结构形式结构紧凑,工作可靠,调整方便,能够精确调整。
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22165.___传感器的转换元件是指传感器中能直接感受或响应被测量的部分。
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22166.___感应同步器是一种应用电磁感应原理制造的高精度检测元件,有直线和圆盘式两种,分别用作检测直线位移和转角。
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22167.___选择传感器时,如果测量的目的是进行定性分析,则选用绝对量值精度高的传感器,而不宜选用重复精度高的传感器。
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22168.___传感器在使用前、使用中或修理后,必须对其主要技术指标标定或校准,以确保传感器的性能指标达到要求。
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关于深化机构和行政体制改革,以下说法不正确的是_____。
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2___
A. His family moved to Sacramento to settle down.
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A. Tomake him feel better after he lost the first prize.
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A. Walking under a ladder.
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3___
A. Because black cats look like witches.
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4___
A. Breaking a mirror on purpose.
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2___
A. At a café.
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3___
A. She won't write any more books.
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4___
A. J. K. Rowling's secret.
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A. He broke the milk bottle.
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2___
A. Ѕhе gаvе hіm а lоng leсture.
B. She shouted at him in anger.
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3___
A. How to do an experiment.
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A. Mistakes can become learning opportunities.
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A. Because he likes the sunny weather,
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A. To go sailing.
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A. Going to visit relatives.
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4___
A. Surfing in the sea.
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A. 89 percent.
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A. People aged 16to 24.
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D. People aged 55 and over.
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3___
A. People aged16 to 24 preferred listening to music most.
B. more popularB It was geting more andamong the Bish people.
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4___
A. Older people go out to pubs more often.
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1___
A. 4 hours.
B. 2 hours.
C. 1.5 hours.
D. 45 minutes.
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2___
A. At 8.
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C. At 6.
D. At 5.
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A. She can either read or rest a little on the train.
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4___
A. He can take the train to the old part of the city.
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1___
A. About an hour.
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D. More than one and a half hours.
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A. More and more Americans spend over an hour getting to work.
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3___
A. Because gas prices are not high.
B. Because the commute is not tiring.
C. Because he can attend a better school.
D. Because he can have his favorite lifestyle.
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4___
A. Traffic jams.
B. Expensive housing.
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D. A tiring and boring trip.
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1___
A. She liked playing an interesting game.
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A. None of her friends likes Jason.
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3___
A. The party will last four hours.
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D. They will play a new game called Guess Who"