【正文】 速鍵，直流電機有圖 43的正向加速運行結果。 25 圖 44 電機正轉減速 按下反轉鍵，直流電機有圖 45反向加速運行結果。在 Protuse和 Keil c中仿真了出來，同時也做出了實物，基本上實現(xiàn)了直流電機的停止、加速、減速以及轉向控制。在這近兩個月的畢業(yè)設計中，我們有艱辛的付出，也有了收獲。 首先，學習能力和解決問題的信心都得到了提高。通過這次畢業(yè)設計，我不僅對理論有了更深一步的認識，還培養(yǎng)了自學能力和解決問題的能力，更重要的是，培養(yǎng)了克服困難的勇氣和信心。 27 參 考 文 獻 [1] 顧繩谷 .電機及拖動基礎 [M]，北京：機械工業(yè)出版社， 2022. [2] 楊斌文，梅英，徐宇明 .并勵直流電動機的機械特性分析 (英文 )[J]，湖南文理學院學報 (自然科學版 )， 2022， ， ： 6061,68. [3] 王鑒光 .電動機控制系統(tǒng) [M]， 北京 ： 北京機械工業(yè)出版社， 1994. [4] 王小明 .電動機的單片機控制 [M]， 北京 ： 北京航空航天大學出版社， 2022. [5] 張琛 .直流無刷電動機原理及應用 [M]， 北京 ： 北京機械工業(yè)出版社， 1996. [6] 袁淑芬 .實現(xiàn)直流無刷電動機調 速控制的一種新型方法 [J]，長春理工大學學報， 2022， ， ： 113115. [7] 吳寶啟，張元偉，劉陽 .基于單片機的無刷直流電機控制方案設計 [J]，煤礦現(xiàn)代化， 2022， ， ： 74. [8] 劉小春，首珩 .無刷直流電動機的單片機控制 [J]，自動化技術與應用， 2022， ： 129131. [9] 周興華 .用單片機控制直流電機變速 [J]，電子制作， 2022， ， ：3435. [10] 岳東海，顏鵬 .直流電機 PWM無級調速控制系 統(tǒng)設計 [J]，價值工程， 2022， :135136. [11]郭浩 .3A驅動能力 PWM直流電機控制電路的制作 [J]，電子制作， 2022， ，:4243. 28 致 謝 經(jīng)過半年的忙碌和工作，本次畢業(yè)設計已經(jīng)接近尾聲，作為一個本科生的畢業(yè)設計，由于經(jīng)驗的匱乏，難免有許多考慮不周全的地方，如果沒有導師的督促指導，想要完成這個設計 還是比較困難的 。老師平日里工作繁多，但在我做畢業(yè)設計的 時期 ， 一直關心我的論文進展，從 設計 草案的確定和修改，中期檢查，后期詳細設計等整個過程中都給予了我 很大的關心 。此次畢業(yè)設計才會順利完成。 29 附程序清單 //畢業(yè)論文設計：基于單片機的直流電機控制系統(tǒng)的設計 // include define unchar unsigned char define unint unsigned int unsigned char code dispcode[]={0xc0,0xf9,0xa4,0xb0, 0x99,0x92,0x82,0xf8, 0x80,0x90,0x88,0x83, 0xc6,0xa1,0x86,0x84,0xff,0xbf}。 //位選口 unsigned char dispbuf[4]={0,0,0,0}。 unint mstt。 unint count=0。 void ledshow()。 void delay()。 void turn()。 30 void speedup()。 void main(void) { P3_0=1。 dispbuf[0]=16。 TH0=0x06。 TR0=1。 EA=1。//數(shù)碼管顯示 keyscan()。 31 for(i=20。i) for(j=248。j)。 P1=0xff。0x1f)!=0x1f) { delay()。0x1f)!=0x1f) { temp=P1amp。 switch(temp) { case 0x1e: just()。 case 0x1d: turn()。 case 0x1b: motorstop()。 case 0x17: speedup()。 32 case 0x0f: speeddown()。 } } } while((P1amp。 } //數(shù)碼管顯示程序 void ledshow() { /* P0=dispcode[dispbuf[dispbitt]]。 dispbitt++。 } */ P2=0x01。 for(i=0。i++)。P0=dispcode[dispbuf[1]]。i700。 P2=0x04。 for(i=0。i++)。P0=dispcode[dispbuf[3]]。i700。 dispbuf[1]=tp/100。 dispbuf[3]=tp%10。 if(mstt==8) { mstt=0。 P2=dispbitcode[dispbitt]。 if(dispbitt==4) 34 { dispbitt=0。 if(counttp) P3_7=0。 count++。 P3_1=0。 } void turn() { P3_0=0。 35 dispbuf[0]=17。 } void speedup() { if(tp99) tp=100。 } void speeddown() { if(tp1) tp=0。 } 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 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. 36 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。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. 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 150th anniversary celebrations and will attend City39。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 governing body, has also ordered an immediate investigation into the referee39。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。或許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。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。 Junior high school, thought to have a crush on just means that the real growth, but