電大機(jī)電一體化系統(tǒng)設(shè)計(jì)基礎(chǔ)課程形考作業(yè)1(修改)

1、機(jī)電一體化系統(tǒng)設(shè)計(jì)基礎(chǔ)課程形成性考核作業(yè)姓名_學(xué)號(hào)_形成性考核作業(yè)1一、判斷題（正確的打，錯(cuò)誤的打）1機(jī)電一體化系統(tǒng)的主要功能就是對(duì)輸入的物質(zhì)按照要求進(jìn)行處理，輸出具有所需特性的物質(zhì)。（ ） 2. 系統(tǒng)論、信息論、控制論是機(jī)電一體化技術(shù)的理論基礎(chǔ)，是機(jī)電一體化技術(shù)的方法論。（ ） 3信息處理技術(shù)是指在機(jī)電一體化產(chǎn)品工作過(guò)程中，與工作過(guò)程各種參數(shù)和狀態(tài)以及自動(dòng)控制有關(guān)的信息輸入、識(shí)別、變換、運(yùn)算、存儲(chǔ)、輸出和決策分析等技術(shù)。（ ）4自動(dòng)控制是在人直接參與的情況下，通過(guò)控制器使被控對(duì)象或過(guò)程自動(dòng)地按照預(yù)定的規(guī)律運(yùn)行。（ ）5產(chǎn)品的組成零部件和裝配精度高，系統(tǒng)的精度一定就高。（ ）6為減少機(jī)械傳動(dòng)部

2、件的扭矩反饋對(duì)電機(jī)動(dòng)態(tài)性能的影響，機(jī)械傳動(dòng)系統(tǒng)的基本固有頻率應(yīng)低于電氣驅(qū)動(dòng)部件的固有頻率的23倍，同時(shí)，傳動(dòng)系統(tǒng)的固有頻率應(yīng)接近控制系統(tǒng)的工作頻率，以免系統(tǒng)產(chǎn)生振蕩而失去穩(wěn)定性。（ ）7傳動(dòng)機(jī)構(gòu)的轉(zhuǎn)動(dòng)慣量取決于機(jī)構(gòu)中各部件的質(zhì)量和轉(zhuǎn)速。（ ）8在閉環(huán)系統(tǒng)中，因齒輪副的嚙合間隙而造成的傳動(dòng)死區(qū)能使系統(tǒng)以610倍的間隙角產(chǎn)生低頻振蕩，采用消隙裝置，以提高傳動(dòng)精度和系統(tǒng)穩(wěn)定性。（ ）9進(jìn)行機(jī)械系統(tǒng)結(jié)構(gòu)設(shè)計(jì)時(shí)，由于阻尼對(duì)系統(tǒng)的精度和快速響應(yīng)性均產(chǎn)生不利的影響，因此機(jī)械系統(tǒng)的阻尼比取值越小越好。（ ）10滾珠絲杠垂直傳動(dòng)時(shí)，必須在系統(tǒng)中附加自鎖或制動(dòng)裝置。（ ）11采用偏心軸套調(diào)整法對(duì)齒輪傳動(dòng)的側(cè)隙進(jìn)行

3、調(diào)整，結(jié)構(gòu)簡(jiǎn)單，且可以自動(dòng)補(bǔ)償側(cè)隙。（ ）12采用虛擬樣機(jī)代替物理樣機(jī)對(duì)產(chǎn)品進(jìn)行創(chuàng)新設(shè)計(jì)測(cè)試和評(píng)估，延長(zhǎng)了產(chǎn)品開(kāi)發(fā)周期，增加了產(chǎn)品開(kāi)發(fā)成本，但是可以改進(jìn)產(chǎn)品設(shè)計(jì)質(zhì)量，提高面向客戶(hù)與市場(chǎng)需求能力。（ ）二、單選題1 以下產(chǎn)品屬于機(jī)電一體化產(chǎn)品的是（ ）。a游標(biāo)卡尺 b電話(huà)c全自動(dòng)洗衣機(jī) d非指針式電子表2為提高機(jī)電一體化機(jī)械傳動(dòng)系統(tǒng)的固有頻率，應(yīng)設(shè)法（ ）。 a增大系統(tǒng)剛度 b增大系統(tǒng)轉(zhuǎn)動(dòng)慣量c增大系統(tǒng)的驅(qū)動(dòng)力矩 d減小系統(tǒng)的摩擦阻力3導(dǎo)程l0=8mm的絲杠驅(qū)動(dòng)總質(zhì)量為60kg的工作臺(tái)與工件，則其折算到絲杠上的等效轉(zhuǎn)動(dòng)慣量為（ ）kgmm2。 a48.5 b97c4.85 d9.74傳動(dòng)系統(tǒng)的固

4、有頻率對(duì)傳動(dòng)精度有影響，（ ）固有頻率可減小系統(tǒng)地傳動(dòng)誤差，（ ）系統(tǒng)剛度可提高固有頻率。a提高，提高 b提高，減小c減小，提高 d減小，減小5下列哪種方法是采用單螺母預(yù)緊原理來(lái)消除滾珠絲杠副的間隙？（ ） a螺紋調(diào)隙式 b雙螺母墊片調(diào)隙式c齒差調(diào)隙式 d偏置導(dǎo)程法6. 齒輪傳動(dòng)的總等效慣量隨傳動(dòng)級(jí)數(shù)( )。 a.增加而減小 b.增加而增加c.減小而減小 d.變化而不變7多級(jí)齒輪傳動(dòng)中，各級(jí)傳動(dòng)比“前小后大”的分配原則不適用于按（ ）設(shè)計(jì)的傳動(dòng)鏈。 a最小等效轉(zhuǎn)動(dòng)慣量原則（小功率傳動(dòng)裝置）b最小等效轉(zhuǎn)動(dòng)慣量原則（大功率傳動(dòng)裝置）c輸出軸的轉(zhuǎn)角誤差最小原則d重量最輕原則8某機(jī)電一體化系統(tǒng)需要消除

5、齒輪傳動(dòng)的齒側(cè)間隙，采取下列哪種方法使得調(diào)整過(guò)程中能自動(dòng)補(bǔ)償齒側(cè)間隙？（ ） a偏心套調(diào)整法 b軸向墊片調(diào)整法c薄片錯(cuò)齒調(diào)整法 d軸向壓簧錯(cuò)齒調(diào)整法三、簡(jiǎn)答題1完善的機(jī)電一體化系統(tǒng)主要包括哪幾部分？答：機(jī)械本體、動(dòng)力系統(tǒng)、檢測(cè)傳感系統(tǒng)、執(zhí)行部件和信息處理及控制系統(tǒng)五部分相互協(xié)調(diào)，共同完成所規(guī)定的目的功能。通過(guò)接口及相應(yīng)軟件有機(jī)結(jié)合在一起，構(gòu)成內(nèi)部匹配合理、外部效能最佳的完整產(chǎn)品。2簡(jiǎn)述機(jī)電一體化系統(tǒng)中的接口的作用。3機(jī)械運(yùn)動(dòng)中的摩擦和阻尼會(huì)降低效率，但是設(shè)計(jì)中要適當(dāng)選擇其參數(shù)，而不是越小越好。為什么？4簡(jiǎn)述機(jī)械系統(tǒng)的剛度對(duì)系統(tǒng)動(dòng)態(tài)特性的影響。四、計(jì)算題1.某工作臺(tái)采用直流電機(jī)絲杠螺母機(jī)構(gòu)驅(qū)動(dòng)如

6、圖所示，已知電機(jī)軸的轉(zhuǎn)動(dòng)慣量jm=410-4kgm2，與電機(jī)輸出軸相連的小齒輪的轉(zhuǎn)動(dòng)慣量j1=110-4kgm2，大齒輪的轉(zhuǎn)動(dòng)慣量j2=1.810-4kgm2，絲杠的轉(zhuǎn)動(dòng)慣量js=3.810-4kgm2。工作臺(tái)的質(zhì)量m=50kg，絲杠導(dǎo)程t=5mm，齒輪減速比為i=5。試求：（1）工作臺(tái)折算到絲杠的等效轉(zhuǎn)動(dòng)慣量jg；（2）傳動(dòng)件折算到電機(jī)軸的等效轉(zhuǎn)動(dòng)慣量je；（3）電機(jī)軸上的總轉(zhuǎn)動(dòng)慣量j。工作臺(tái)絲杠 滾珠螺母齒輪減速器聯(lián)軸器dc伺服電機(jī)i=5圖 直流電機(jī)絲杠螺母機(jī)構(gòu)驅(qū)動(dòng)工作臺(tái)2.已知某四級(jí)齒輪傳動(dòng)系統(tǒng)，各齒輪的轉(zhuǎn)角誤差為1=2=8=0.01弧度，各級(jí)減速比相同，即i1 = i2 = i4 =3

7、，求該系統(tǒng)的最大轉(zhuǎn)角誤差max。五、綜合題1. 分析下圖調(diào)整齒側(cè)間隙的原理。1. 鎖緊螺母 2. 圓螺母 3. 帶凸緣螺母 4.無(wú)凸緣螺母待添加的隱藏文字內(nèi)容32.分析下圖中傳動(dòng)大負(fù)載時(shí)消除齒側(cè)間隙的原理。1、6小齒輪 2、5大齒輪 3齒輪 4預(yù)載裝置 7齒條if we dont do that it will go on and go on. we have to stop it; we need the courage to do it.his comments came hours after fifa vice-president jeffrey webb - also in lond

8、on for the fas celebrations - said he wanted to meet ivory coast international toure to discuss his complaint.cska general director roman babaev says the matter has been exaggerated by the ivorian and the british media.blatter, 77, said: it has been decided by the fifa congress that it is a nonsense

9、 for racism to be dealt with with fines. you can always find money from somebody to pay them.it is a nonsense to have matches played without spectators because it is against the spirit of football and against the visiting team. it is all nonsense.we can do something better to fight racism and discri

10、mination.this is one of the villains we have today in our game. but it is only with harsh sanctions that racism and discrimination can be washed out of football.the (lack of) air up there watch mcayman islands-based webb, the head of fifas anti-racism taskforce, is in london for the football associa

11、tions 150th anniversary celebrations and will attend citys premier league match at chelsea on sunday.i am going to be at the match tomorrow and i have asked to meet yaya toure, he told bbc sport.for me its about how he felt and i would like to speak to him first to find out what his experience was.u

12、efa hasopened disciplinary proceedings against cskafor the racist behaviour of their fans duringcitys 2-1 win.michel platini, president of european footballs governing body, has also ordered an immediate investigation into the referees actions.cska said they were surprised and disappointed by toures

13、 complaint. in a statement the russian side added: we found no racist insults from fans of cska.baumgartner the disappointing news: mission aborted.the supersonic descent could happen as early as sunda.the weather plays an important role in this mission. starting at the ground, conditions have to be

14、 very calm - winds less than 2 mph, with no precipitation or humidity and limited cloud cover. the balloon, with capsule attached, will move through the lower level of the atmosphere (the troposphere) where our day-to-day weather lives. it will climb higher than the tip of mount everest (5.5 miles/8

15、.85 kilometers), drifting even higher than the cruising altitude of commercial airliners (5.6 miles/9.17 kilometers) and into the stratosphere. as he crosses the boundary layer (called the tropopause),e can expect a lot of turbulence.the balloon will slowly drift to the edge of space at 120,000 feet

16、 ( then, i would assume, he will slowly step out onto something resembling an olympic diving platform.below, the earth becomes the concrete bottom of a swimming pool that he wants to land on, but not too hard. still, hell be traveling fast, so despite the distance, it will not be like diving into th

17、e deep end of a pool. it will be like he is diving into the shallow end.skydiver preps for the big jumpwhen he jumps, he is expected to reach the speed of sound - 690 mph (1,110 kph) - in less than 40 seconds. like hitting the top of the water, he will begin to slow as he approaches the more dense a

18、ir closer to earth. but this will not be enough to stop him completely.if he goes too fast or spins out of control, he has a stabilization parachute that can be deployed to slow him down. his team hopes its not needed. instead, he plans to deploy his 270-square-foot (25-square-meter) main chute at an altitude of around 5,000 feet (1,524 meters).in order to deploy this chute successfully, he will have to slow to 172 mph (277 kph). he will have a reserve parachu