【正文】 法就是用萬用表測試供電電路主要元器件的電壓輸出。測試結果表明，當系統(tǒng)輸入電壓為 12V～ 50V 時，電機空載運轉正常，系統(tǒng)中的各種電源工作可靠，符合系統(tǒng)預設要求。 (2)工作電流范圍檢測：測試結果表明電機工作電流在 5A 以下均能正常工作。 (3)驅動方向檢測：由遙控器通過控制菜單發(fā)出正 /反轉運行指令，電機能按照指令要求以正確的方向運行。 27 總結 本文所做的主要工作總結如下： (1) 理論方面對主要的幾種步進電動機的結構、工作原理和優(yōu)缺點及步進電動機的應用和研究概況進行了總結。重點對四相式步進電機 ，研究了它的結構特點、運行特性和數學模型的建立。對步進電機傳統(tǒng)的和新型的各種驅動方式進行了分析和比較。 (2) 硬件方面很好地運用了單片機和可編程邏輯器件進行控制，運用光電隔離、提高了電路的抗干擾能力。對整個系統(tǒng)的軟件也進行了優(yōu)化設計。 (3) 通過外部遙控器輸入正 /反轉運行信號和不同的運行方式信號對系統(tǒng)性能進行測試，得出相應的結論。 本論文的一些創(chuàng)新之處： (1) 采用遙控器進行運行方式的控制。 (2) 能控制單極性跟雙極性兩種步進電機。 (3) 系統(tǒng)無論是在硬件還是軟件系統(tǒng)中都采用模塊化的設計方法。 這使得系統(tǒng)擴展起來比較方便，系統(tǒng)可移植性高，增加了系統(tǒng)的靈活性和可靠性，具有廣泛的適應性。 28 致謝 本設計是在張懷宇老師的精心指導下完成的，在設計過程中，老師提供了大量的設計資料，給予了無微不至的關懷與幫助。從她那里，我感覺不僅僅學到的是專業(yè)知識，還學習到了工作的態(tài)度以及對事業(yè)的追求，這將對以后出身社會，參加工作起著非常重要的作用。她引導著我走向理想的彼岸，向著成功的高峰不斷進取，克服一個有又一個挫折，直奔喜悅的大堂。在此，向他們以及支持和幫助過此次設計編寫的人表示衷心的感謝。 最 后還要感謝大 學 三 年來所有的老師，為我們打下 電氣 專業(yè)知識的基礎；同時還要感謝所有的同學們，正是因為有了你們的支持和鼓勵。此次畢業(yè)設計才會順利完成。 最后感謝 宜賓技術學院學院三 年來對我的大力栽培 。 29 參考文獻 [1]孫孝年 .淺析步進電機驅動器與步進電機的相互關系 .[J].世界電子元器件 ,1999,(3):3637 [2]王曉明 .電動機的單片機控制 .[M].北京 :北京航空航天大學出版社， 2021. 5 [3]趙影 .電機與電力拖動 .[M].北京 :國防工業(yè)出版社， 2021. 7 [4]孫建忠 ，白鳳仙 .特種電機及其控制 .[M].北京 :中國水利水電出版社， 2021 [5]周明安，朱光忠，宋曉華等 .步進電機驅動技術發(fā)展及現狀 .[J].機電工程技術， 2021,34 (2):1617 [6]王鴻枉 .步進電機控制技術入門 .[M].上海 :同濟大學出版社， 1990:7192 [7]王衛(wèi)，馮培松一種新穎的三相混合式步進電機驅動器的設計 .[J].電工技術， 1995,(1):2022 [8]趙奉先 .提高步進電機運行速度的研究 .儀表技術與傳感器， 2021,(2):4546 [9]王宗培，趙書韜，任雷等 .混合式 步進電機的研究 (一 ).[J].電工技術雜志， 1998,(3):35 [10]王宗培，趙書韜，任雷等 .混合式步進電機的研究 (二 ).[J].電工技術雜志， 1998,(4):57 [11]趙永瑞，李剛 .三相混合式步進電機系統(tǒng) .[J].機電一體化， 2021,(3):5051 09/20 11:46 102 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。t agree with the disciplinary action your employer has taken against you ? your employer dismisses you and you think that you have been dismissed unfairly. For more information about dismissal and unfair dismissal, see Dismissal. You can make a claim to an employment tribunal, even if you haven39。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。t charge you more than 35% of your pensation if you win the case. If you are thinking about signing up for a damagesbased agreement, you should make sure you39。re clear about the terms of the agreement. It might be best to get advice from an experienced 30 adviser, for example, at a Citizens Advice Bureau. To find your nearest CAB, including those that give advice by , click on nearest CAB. 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。s antiracism taskforce, is in London for the Football Association39。s 150th anniversary celebrations and will attend City39。s 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 it39。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 21 win. Michel Platini, president of European football39。s governing body, has also ordered an immediate investigation into the referee39。s actions. CSKA said they were surprised and disappointed by Toure39。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。 May be back in the past, to oneself the paranoid weird belief disillusionment, these days, my mind has been very messy, in my mind constantly. Always feel oneself should go to do something, or write something. Twenty years of life trajectory deeply shallow, suddenly feel something, do it. 一字開頭的年齡已經到了尾聲?；蛟S是愧疚于自己似乎把轉瞬即逝的很多個不同的日 子過成了同一天的樣