【正文】 Baumgartner the disappointing news: Mission aborted. r plays an important role in this mission. Starting at the ground, conditions have to be 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 daytoday weather lives. It will climb higher than the tip of Mount Everest ( miles/ kilometers), drifting even higher than the cruising altitude of mercial airliners ( miles/ kilometers) and into the stratosphere. As he crosses the boundary layer (called the tropopause),e can expect a lot of turbulence. 。t start planning... Those years, those days of do, finally, like youth, will end in our life. 此刻，天空是陰暗的，空氣里有著剛下過雨之后的清新因子。 From the corner at the beginning of deep friendship。 At the moment, the sky is dark, the air is fresh factor after just rained. Suddenly thought of blue plaid shirt。嫌惡過自己的怯懦，最終卻發(fā)現(xiàn)有很多 緣分 ，有很多錯過，好像冥冥之中真的已經(jīng)注定。想要的，不想要的，界限明確，好像沒有什么可以撼動自己。 A person39。t remember his appearance. 童年時，覺得壓歲錢和新衣服是過年必備，但是隨著年齡的推進，會越來越發(fā)現(xiàn)，那些東西根本就可有可無；初中時，以為要有一場 暗戀才意味著真正的成長，但三年過去后，自己心平氣和的寫同學錄的時候，突然就發(fā)現(xiàn)是不是真正的成長了，好像并沒有那么重要了；然后到了高中，覺得非要吐露出自己的心聲才能為高中生涯里的懵懂情愫劃上一個句點，但畢業(yè)晚會的時候最終還是被梗塞在了咽喉，后來再次站在他曾經(jīng)揮汗如雨的球場，看著他投過籃球的球框時，突然間發(fā)現(xiàn)自己已經(jīng)想不起他的容顏。 Then in high school, think don39。 Junior high school, thought to have a crush on just means that the real growth, but over the past three years later, his writing of alumni in peace, suddenly found that isn39。二十年的人生軌跡深深淺淺，突然就感覺到有些事情，非做不可了。或許是愧疚于自己似乎把轉(zhuǎn)瞬即逝的很多個不同的日 子過成了同一天的樣子；或許是追溯過去，對自己那些近乎偏執(zhí)的怪異信念的醒悟，這些天以來，思緒一直很凌亂，在腦海中不斷糾纏。s plaint. In a statement the Russian side added: We found no racist insults from fans of CSKA. Age has reached the end of the beginning of a word. May be guilty in his seems to passing a lot of different life became the appearance of the same day。s governing body, has also ordered an immediate investigation into the referee39。s about how he felt and I would like to speak to him first to find out what his experience was. Uefa has opened disciplinary proceedings against CSKA for the racist behaviour of their fans during City39。s 150th anniversary celebrations and will attend City39。re clear about the terms of the agreement. It might be best to get advice from an experienced adviser, for example, at a Citizens Advice Bureau. To find your nearest CAB, including those that give advice by , click on nearest CAB. 臨沂大學 35 For more information about making a claim to an employment tribunal, see Employment tribunals. The (lack of) air up there Watch mCayman Islandsbased Webb, the head of Fifa39。t appealed against the disciplinary action your employer has taken against you. However, if you win your case, the tribunal may reduce any pensation awarded to you as a result of your failure to appeal. Remember that in most cases you must make an application to an employment tribunal within three months of the date when the event you are plaining about happened. If your application is received after this time limit, the tribunal will not usually accept i. If you are worried about how the time limits apply to you, take advice from one of the anisations listed under Further help. Employment tribunals are less formal than some other courts, but it is still a legal process and you will need to give evidence under an oath or affirmation. Most people find making a claim to an employment tribunal challenging. If you are thinking about making a claim to an employment tribunal, you should get help straight away from one of the anisations listed under Further help. If you are being represented by a solicitor at the tribunal, they may ask you to sign an agreement where you pay their fee out of your pensation if you win the case. This is known as a damagesbased agreement. In England and Wales, your solicitor can39。 *****年 *月 *日 g an employment tribunal clai Employment tribunals sort out disagreements between employers and employees. You may need to make a claim to an employment tribunal if: ? you don39。 在畢業(yè)設(shè)計期間，我要感謝許多讓我分享他們寶貴經(jīng)驗和知識的老師，教會我正確的思考方式。他淵博的知識、 開闊的視野和敏銳的思維給了我深深的啟迪。 臨沂大學 33 參 考 文 獻 [1]張友德 .單片微型機原理、應(yīng)用與實驗 [M].上海 :復旦大學出版社， 2021. [2]李夙 .異步電動機直接轉(zhuǎn)矩控制 [M].北京 :機械工業(yè)出版社 ,1998. [3]王鴻鈺 .步進電機控制入門 [M].上海 :同濟大學出版社 ,1990. [4]袁任光 ,張偉武 .電動機控制電路選用與 258 實例 [M].北京 :機械工業(yè) 出版社 ,2021. [5]王秀和 .永磁電機 [M].北京 : 中國電力出版社 ,2021. [6]房玉明 ,杭柏林 .基于單片機的步進電機開環(huán)控制系統(tǒng) [J].電機與控制應(yīng)用， 2021，33（ 4）： 6464. [7]孫笑輝 ,韓曾晉 .減少感應(yīng)電動機直接轉(zhuǎn)矩控制系統(tǒng)轉(zhuǎn)矩脈動的方法 [J].電氣傳動 ,2021， (1):811. [8]馮江華 ,陳高華 ,黃松濤 .異步電動機的直接轉(zhuǎn)矩控制 [J].電工技術(shù)學報 ,1999，(6):2933. [9]江一，朱凌 ,申仲濤 .異步電動機直接轉(zhuǎn)矩控制仿真研究 [J].華北電力大學學報 ,2021， (1):1013. [10]韓利虎 . 淺談步進電機的基本原理 [J]. 內(nèi)蒙古石油化工 , Inner Mongolia Petrochemical Industry, 2021， (11):109. [11]張巍 . 淺談單片機控制步進電機 [J]. 安防科技 ,2021， (3): 25. [12] 喬璐 . 景林 ,韓英桃 .一種實用的步進電動機驅(qū)動器設(shè)計 [J].微特電機 ,2021，(10):2931. [13] 康晶 .采用反饋控制的步進電機高低壓驅(qū)動電路 [J].電力電子技術(shù) ,2021,37(1):6162,65. [14] Isao Takahashi,Toshihiko new responese and highefficiency control strategy of an motor[J].IEEE Trans on Ind Appl,1986,22(5):820827. [15]Depenbrock selfcontrol(DSC) of inverterfed machine[J].IEEE Trans on P E,1998,3(4):420429. [16]AT Command set for TC35i Version . 臨沂大學 34 致 謝 首先誠摯的感謝我的論文指導老師 ***老師，從選題的確定、論文的寫作、修改到最后定稿過程中，自始至終都傾注著老師的心血。 本設(shè)計的硬件制作部分完全是實行的手工焊接，沒有制作 PCB 板，這樣的后果就是焊接完電路板之后容易出現(xiàn)問題，檢查麻煩，而且要是在后期全部制作調(diào)試都完成后再中途出現(xiàn)問題了檢查起來是相當?shù)穆闊? 本設(shè)計 KEY2 用一個按鍵控制正反轉(zhuǎn)，觀察起來有點困難。 后續(xù)工作： 在本次設(shè)計中更多的是注重整體功能的實現(xiàn)，注重的是操作簡單，所以本系統(tǒng)臨沂大學 32 采用了開環(huán)控制的方式，電機也是選用的最常用的步進電機。 在本設(shè)計中作為電機正常工作比較重要的電機驅(qū)動模塊，本設(shè)計中是采用驅(qū)動芯片 ULN2021 來實現(xiàn)的，其特點是成本低，可靠性高，出現(xiàn)問題容易維護，實現(xiàn)相對容易等特點。 通過系統(tǒng)的設(shè)計實現(xiàn)了預期的設(shè)計目標，完成了全部的設(shè)計任務(wù)，具體功能如下：完成了整個系統(tǒng)的硬件設(shè)計和軟件編程，能通過按鍵電路控制步進電機的轉(zhuǎn)速控制，能