北理工珠海学院期末考试题A

北理工珠海学院期末考 试题 中考模拟试题doc幼小衔接 数学试题 下载云南高中历年会考数学试题下载N4真题下载党史题库下载 A 2007-2008学年第二学期机械工程控制基础课程 期末考试试卷,A卷, 级 专业 姓名 学号 成绩 注意:将答案写在答题纸上才有成绩～写在卷子上无效。 一、单项选择题(共15小题，每小题2分，共30分) 1.系统的输出信号对控制作用的影响 A.开环有 B.闭环有 C.都没有 D.都有 2.某系统在输入信号作用下，测得的输出响应为，，rt,1，t ,10t，已知初始条件为零，则系统的传递函数为 ，，,s，，，，ct,t，0.9,0.9e 10s，10.9110，，A. B. C. D. 2s，10s，10s，10，，ss，10 80.5s，1，，Gs,3.已知在单位负反馈控制系统的开环传递函数为，，，当输入信2，，s0.1s，1号为时，系统的稳态误差是 e，，1tss A.0.5 B.0 C.0.1 D.0.125 4.一系统在激励作用下，其响应,则该系统的单位脉冲响应，，，，，，xtyt,k,xt ，， gt, kA. ，， B. C. ，， D. 1 k,,t,t ,5.一典型二阶系统的阻尼比，无阻尼固有频率，则系统的有阻尼固,,0.7n ,有频率为 d ,A. B. C. D. 0.49,,0.51,,0.7,,nnnn6.作为控制系统，一般 A.开环不振荡 B.闭环不振荡 C.开环一定振荡 D.闭环一定振荡 4Fs,，，，，ft,7.已知，其反变换为 2S，S，4 11tt815822esin4tsinA. B. et15215 Vertically split casing pump body should not be removable and washable. 3.8.1.4 pumps shall conform to the technical level of vertical and horizontal documents. If there is no provision, in General, the following requirements: the overall installation of pumps, axial horizontal deviation of not more than 0.1/1000 horizontal deviation is less than 0.2/1000; level the measurement flange should be on a level surface or on the horizontal surface of the pump body. Disintegration of the installation of the pump, the level of vertical and horizontal deviation shall be no greater than 0.05/1000; level of horizontal split casing, the exposed part of the shaft or base on a level work surface. 3.8.1.5 alignment, the following requirements of the pump: pump and driven half coupling of radial displacement of the machine-side clearance, axis tilt shall comply with the technical file requirements. When provided, must meet the following requirements: ... Coupling diameter d (mm) radial displacement mm two-axis tilt 0.5/10007~9 of steam turbine-driven pumps and transport high temperature liquid pumps, State at room temperature when aligning should be reserved in accordance with design compensation when its temperature changes. 3.8.1.6 bearing Assembly check that the pump bearing (thick tile), Watts and Watts should fit tightly on the back, the interference values such as device files should be provided as 0.02~0.04mm, bearing and axle journal and the top layer and the shell should be good, without hierarchy, as it emerges, the alloy surface and surface layer and surface should be smooth, free of cracks, pores, skin, slag and scratches, and other defects. Bearing and journal of exposure should be good, contacts within the contact should be uniform, no square centimeter 2~4 a point, contact point shall conform to the technical documents of, such as technical documentation not required, you should comply with the following requirements: when diluted oil lubrication, the tile on contact angle of 130 ?, contact 11,t,t815822C. D. esin4tsinet15215 1008.已知系统的开环传递函数为，则系统的开环增益以及型次2，，，，s0.1s，15s，4 为 A. 25,II型 B. 100,II型 C. 100,I型 D. 25,0型 9.在闭环控制系统中，通过增大开环增益K可使 A.系统的精度提高，并且稳定性也提高 B.系统的精度下降，但稳定性提高 C.系统的精度下降，稳定性也下降 D.系统的精度提高，但稳定性下降 1,,,3,,10.已知系统的单位脉冲输入时的响应为，则系统的传递函，，,,gt0.11e,,,,数是 ,,,,133,,,,A. B. 0.10.1,,,1,,s3s，1,,s，,,3,, 31,,,,C. D. 0.10.1,,,,3s，13s，1,,,, s，911.一系统在干扰单独作用下的误差函数E，，s,,，在输入信号单独作1，，ss，5 2s，2s，9Es,,，，e,用下的误差函数，则系统总的稳态误差 ss22，，ss，3s，5 99,A. B.0 C. D. ,55 12.二阶欠阻尼系统的性能指标:上升时间、峰值时间和调整时间，反映了系统的 A.稳定性 B.响应的快速性 C.精度 D.相对稳定性 13.某一系统的稳态加速度偏差为一常数，则此系统是 系统。 A.0型 B.有一积分环节的 C.II型 D.没有积分环节的 axis tilt 0.5/10007~9 of steam turbine-radial displacement mm two omply with the technical file requirements. When provided, must meet the following requirements: ... Coupling diameter d (mm)side clearance, axis tilt shall c-ing requirements of the pump: pump and driven half coupling of radial displacement of the machineevel of horizontal split casing, the exposed part of the shaft or base on a level work surface. 3.8.1.5 alignment, the follow000; lisintegration of the installation of the pump, the level of vertical and horizontal deviation shall be no greater than 0.05/1ess than 0.2/1000; level the measurement flange should be on a level surface or on the horizontal surface of the pump body. Dn is ling requirements: the overall installation of pumps, axial horizontal deviation of not more than 0.1/1000 horizontal deviatios shall conform to the technical level of vertical and horizontal documents. If there is no provision, in General, the followVertically split casing pump body should not be removable and washable. 3.8.1.4 pump2angle of 130 ?, contactmentation not required, you should comply with the following requirements: when diluted oil lubrication, the tile on contact docu ld be uniform, no square centimeter 2~4 a point, contact point shall conform to the technical documents of, such as technicalskin, slag and scratches, and other defects. Bearing and journal of exposure should be good, contacts within the contact shou pores,be good, without hierarchy, as it emerges, the alloy surface and surface layer and surface should be smooth, free of cracks, lues such as device files should be provided as 0.02~0.04mm, bearing and axle journal and the top layer and the shell should nce va.1.6 bearing Assembly check that the pump bearing (thick tile), Watts and Watts should fit tightly on the back, the interfereat room temperature when aligning should be reserved in accordance with design compensation when its temperature changes. 3.8driven pumps and transport high temperature liquid pumps, State - 14.某控制元件的对数幅频特性曲线(如图)，则它的传递函数为 ，，Gs, ，，L,10s0.1sA. B. db 20s，120s，1 0.10.1s ,0 10 20 C. D. 0.05s，10.05s，1 15.幅相频率特性曲线与对数频率特性曲线的关系是 A.幅相频率特性曲线上的单位圆相当于对数频率特性曲线上的-20分贝线 B.幅相频率特性曲线上的单位圆相当于对数频率特性曲线上的+20分贝线 C.幅相频率特性曲线上的单位圆相当于对数频率特性曲线上的零分贝线 D.幅相频率特性曲线上的单位圆相当于对数频率特性曲线上的+1分贝线 二、填空题(共9小题，每小题2分，共18分) 11.若时间函数的拉氏变换为，已知Fs,，利用初值定理求，，，，，，ftFs2，，s，2 ，得的 ? 。 ，，f0, 2.对于物理可实现系统，传递函数分母中的阶次n与分子中的阶次m，总ss存在 ? 。 3.一阶惯性环节的传递函数为 ? 。 4.在系统传递函数中，令，就 ? 。 s,j,，，Gs 5.传递函数 表 关于同志近三年现实表现材料材料类招标技术评分表图表与交易pdf视力表打印pdf用图表说话 pdf 示系统 ? ，与外界输入无关。 1，，6.型如的典型环节称为 ? 环节。 0,,,122TSTS，2，1, 7.当时间趋于无穷大时，系统的输出称为 ? 。 ,8.若二阶系统的无阻尼振荡频率为，当系统发生阻尼振荡时，其振荡频率n 为 ? ; 9.对于线性系统，当在其输入端加一个正弦信号时，输出端得到的稳态响应的幅值要改变，而 ? 不发生变化。 三、简答题(共3小题，每小题4分，共12分) 3G，，s,1.某单位反馈系统的开环传递函数为，该系统是否稳定,若稳，，ss，2 -axis tilt 0.5/10007~9 of steam turbine-lacement mm twohe technical file requirements. When provided, must meet the following requirements: ... Coupling diameter d (mm) radial dispside clearance, axis tilt shall comply with t-ents of the pump: pump and driven half coupling of radial displacement of the machinezontal split casing, the exposed part of the shaft or base on a level work surface. 3.8.1.5 alignment, the following requiremf horin of the installation of the pump, the level of vertical and horizontal deviation shall be no greater than 0.05/1000; level o/1000; level the measurement flange should be on a level surface or on the horizontal surface of the pump body. Disintegratioan 0.2ents: the overall installation of pumps, axial horizontal deviation of not more than 0.1/1000 horizontal deviation is less thorm to the technical level of vertical and horizontal documents. If there is no provision, in General, the following requiremVertically split casing pump body should not be removable and washable. 3.8.1.4 pumps shall conf3?, contact t required, you should comply with the following requirements: when diluted oil lubrication, the tile on contact angle of 130ion norm, no square centimeter 2~4 a point, contact point shall conform to the technical documents of, such as technical documentatand scratches, and other defects. Bearing and journal of exposure should be good, contacts within the contact should be unifoslag out hierarchy, as it emerges, the alloy surface and surface layer and surface should be smooth, free of cracks, pores, skin, device files should be provided as 0.02~0.04mm, bearing and axle journal and the top layer and the shell should be good, with ch asAssembly check that the pump bearing (thick tile), Watts and Watts should fit tightly on the back, the interference values su erature when aligning should be reserved in accordance with design compensation when its temperature changes. 3.8.1.6 bearingdriven pumps and transport high temperature liquid pumps, State at room temp 定，稳定裕量是多少, kg 2.一阶系统的闭环极点越靠近S平面原点，其单位阶跃响应速度应该越快还是越慢,为什么, K3.已知系统开环传递函数，其中K为开环增益，T为时间常数。Gs,，，，，STS，1 试问:当r(t)=t时，要减小系统稳态误差应调整哪个参数，为什么, ess 四、综合应用题(共5小题，每小题8分，共40分) CsCs，，，，1.系统结构图如图1所示，试求。 和N(s) ，，，，RsNs + C(s) R(s) + + + GG1 2 图1 - - 2.系统结构图如图2所示，(1)试求系统稳定时K取值范围;(2)当K=2,r(t)=t 时，系统的稳态误差。 ess KR(s) + E(s) C(s) 图2 ，，，，ss，1s，2 - 3.系统如图3所示，当r(t)=3sin2t时，试求系统的频率响应C。 SS CSS 1r(t) + 图3 0.5s - CsEs，，，，和4.系统结构如图4，试求。 ，，，，RsRs R(s) + E(s) + C(s) 图4 ，，GS ，，GS12 - - G 2 9Gs,，，5.单位反馈系统开环传递函数为，试求(1)闭环传递函数; ，，ss，3 ,,5,t(2)阻尼比,和无阻尼自然频率;(3)时的调整时间。 sn axis tilt 0.5/10007~9 of steam turbine-radial displacement mm two omply with the technical file requirements. When provided, must meet the following requirements: ... Coupling diameter d (mm)side clearance, axis tilt shall c-ing requirements of the pump: pump and driven half coupling of radial displacement of the machineevel of horizontal split casing, the exposed part of the shaft or base on a level work surface. 3.8.1.5 alignment, the follow000; lisintegration of the installation of the pump, the level of vertical and horizontal deviation shall be no greater than 0.05/1ess than 0.2/1000; level the measurement flange should be on a level surface or on the horizontal surface of the pump body. Dn is ling requirements: the overall installation of pumps, axial horizontal deviation of not more than 0.1/1000 horizontal deviatios shall conform to the technical level of vertical and horizontal documents. If there is no provision, in General, the followVertically split casing pump body should not be removable and washable. 3.8.1.4 pump4angle of 130 ?, contactmentation not required, you should comply with the following requirements: when diluted oil lubrication, the tile on contact docu ld be uniform, no square centimeter 2~4 a point, contact point shall conform to the technical documents of, such as technicalskin, slag and scratches, and other defects. Bearing and journal of exposure should be good, contacts within the contact shou pores,be good, without hierarchy, as it emerges, the alloy surface and surface layer and surface should be smooth, free of cracks, lues such as device files should be provided as 0.02~0.04mm, bearing and axle journal and the top layer and the shell should nce va.1.6 bearing Assembly check that the pump bearing (thick tile), Watts and Watts should fit tightly on the back, the interfereat room temperature when aligning should be reserved in accordance with design compensation when its temperature changes. 3.8driven pumps and transport high temperature liquid pumps, State - 2007-2008学年第二学期机械工程控制基础课程 A卷答题纸 级 专业 姓名 学号 成绩 一、单项选择题(共15小题，每小题2分，共30分) ,. ,. ,. ,. ,. ,. ,. ,. ,. ,,. ,,. ,,. ,,. ,,. ,,. 二、填空题(共9小题，每小题2分，共18分) ?. ?. ?. ?. ?. ?. ?. ?. ?. 三、简答题(共3小题，每小题4分，共12分) erature when aligning should be reserved in accordance with design compensation when its temperature changes. 3.8.1.6 bearingdriven pumps and transport high temperature liquid pumps, State at room temp-axis tilt 0.5/10007~9 of steam turbine-lacement mm twohe technical file requirements. When provided, must meet the following requirements: ... Coupling diameter d (mm) radial dispside clearance, axis tilt shall comply with t-ents of the pump: pump and driven half coupling of radial displacement of the machinezontal split casing, the exposed part of the shaft or base on a level work surface. 3.8.1.5 alignment, the following requiremf horin of the installation of the pump, the level of vertical and horizontal deviation shall be no greater than 0.05/1000; level o/1000; level the measurement flange should be on a level surface or on the horizontal surface of the pump body. Disintegratioan 0.2ents: the overall installation of pumps, axial horizontal deviation of not more than 0.1/1000 horizontal deviation is less thorm to the technical level of vertical and horizontal documents. If there is no provision, in General, the following requiremVertically split casing pump body should not be removable and washable. 3.8.1.4 pumps shall conf5?, contact t required, you should comply with the following requirements: when diluted oil lubrication, the tile on contact angle of 130ion norm, no square centimeter 2~4 a point, contact point shall conform to the technical documents of, such as technical documentatand scratches, and other defects. Bearing and journal of exposure should be good, contacts within the contact should be unifoslag out hierarchy, as it emerges, the alloy surface and surface layer and surface should be smooth, free of cracks, pores, skin, device files should be provided as 0.02~0.04mm, bearing and axle journal and the top layer and the shell should be good, with ch asAssembly check that the pump bearing (thick tile), Watts and Watts should fit tightly on the back, the interference values su 四、综合应用题(共5小题，每小题8分，共40分) at room temperature when aligning should be reserved in accordance with design compensation when its temperature changes. 3.8driven pumps and transport high temperature liquid pumps, State -axis tilt 0.5/10007~9 of steam turbine-radial displacement mm two omply with the technical file requirements. When provided, must meet the following requirements: ... Coupling diameter d (mm)side clearance, axis tilt shall c-ing requirements of the pump: pump and driven half coupling of radial displacement of the machineevel of horizontal split casing, the exposed part of the shaft or base on a level work surface. 3.8.1.5 alignment, the follow000; lisintegration of the installation of the pump, the level of vertical and horizontal deviation shall be no greater than 0.05/1ess than 0.2/1000; level the measurement flange should be on a level surface or on the horizontal surface of the pump body. Dn is ling requirements: the overall installation of pumps, axial horizontal deviation of not more than 0.1/1000 horizontal deviatios shall conform to the technical level of vertical and horizontal documents. If there is no provision, in General, the followVertically split casing pump body should not be removable and washable. 3.8.1.4 pump6angle of 130 ?, contactmentation not required, you should comply with the following requirements: when diluted oil lubrication, the tile on contact docu ld be uniform, no square centimeter 2~4 a point, contact point shall conform to the technical documents of, such as technicalskin, slag and scratches, and other defects. Bearing and journal of exposure should be good, contacts within the contact shou pores,be good, without hierarchy, as it emerges, the alloy surface and surface layer and surface should be smooth, free of cracks, lues such as device files should be provided as 0.02~0.04mm, bearing and axle journal and the top layer and the shell should nce va.1.6 bearing Assembly check that the pump bearing (thick tile), Watts and Watts should fit tightly on the back, the interfere driven pumps and transport high temperature liquid pumps, State at room temp-axis tilt 0.5/10007~9 of steam turbine-lacement mm twohe technical file requirements. When provided, must meet the following requirements: ... Coupling diameter d (mm) radial dispside clearance, axis tilt shall comply with t-ents of the pump: pump and driven half coupling of radial displacement of the machinezontal split casing, the exposed part of the shaft or base on a level work surface. 3.8.1.5 alignment, the following requiremf horin of the installation of the pump, the level of vertical and horizontal deviation shall be no greater than 0.05/1000; level o/1000; level the measurement flange should be on a level surface or on the horizontal surface of the pump body. Disintegratioan 0.2ents: the overall installation of pumps, axial horizontal deviation of not more than 0.1/1000 horizontal deviation is less thorm to the technical level of vertical and horizontal documents. If there is no provision, in General, the following requiremVertically split casing pump body should not be removable and washable. 3.8.1.4 pumps shall conf7?, contact t required, you should comply with the following requirements: when diluted oil lubrication, the tile on contact angle of 130ion norm, no square centimeter 2~4 a point, contact point shall conform to the technical documents of, such as technical documentatand scratches, and other defects. Bearing and journal of exposure should be good, contacts within the contact should be unifoslag out hierarchy, as it emerges, the alloy surface and surface layer and surface should be smooth, free of cracks, pores, skin, device files should be provided as 0.02~0.04mm, bearing and axle journal and the top layer and the shell should be good, with ch asAssembly check that the pump bearing (thick tile), Watts and Watts should fit tightly on the back, the interference values su erature when aligning should be reserved in accordance with design compensation when its temperature changes. 3.8.1.6 bearing nce va.1.6 bearing Assembly check that the pump bearing (thick tile), Watts and Watts should fit tightly on the back, the interfereat room temperature when aligning should be reserved in accordance with design compensation when its temperature changes. 3.8driven pumps and transport high temperature liquid pumps, State -axis tilt 0.5/10007~9 of steam turbine-radial displacement mm two omply with the technical file requirements. When provided, must meet the following requirements: ... Coupling diameter d (mm)side clearance, axis tilt shall c-ing requirements of the pump: pump and driven half coupling of radial displacement of the machineevel of horizontal split casing, the exposed part of the shaft or base on a level work surface. 3.8.1.5 alignment, the follow000; lisintegration of the installation of the pump, the level of vertical and horizontal deviation shall be no greater than 0.05/1ess than 0.2/1000; level the measurement flange should be on a level surface or on the horizontal surface of the pump body. Dn is ling requirements: the overall installation of pumps, axial horizontal deviation of not more than 0.1/1000 horizontal deviatios shall conform to the technical level of vertical and horizontal documents. If there is no provision, in General, the followVertically split casing pump body should not be removable and washable. 3.8.1.4 pump8angle of 130 ?, contactmentation not required, you should comply with the following requirements: when diluted oil lubrication, the tile on contact docu ld be uniform, no square centimeter 2~4 a point, contact point shall conform to the technical documents of, such as technicalskin, slag and scratches, and other defects. Bearing and journal of exposure should be good, contacts within the contact shou pores,be good, without hierarchy, as it emerges, the alloy surface and surface layer and surface should be smooth, free of cracks, lues such as device files should be provided as 0.02~0.04mm, bearing and axle journal and the top layer and the shell should