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實驗步驟1) 檢查無誤后通電。 =4) 寫出“OUT602”關(guān)于輸入的布爾函數(shù)表達(dá)式。第二部分:模擬電路系統(tǒng)故障診斷與可靠性設(shè)計實驗1 故障字典法測試模擬電路系統(tǒng)故障 實驗?zāi)康?) 學(xué)習(xí)和掌握模擬電路直流故障字典法2) 對典型模擬電路系統(tǒng)進(jìn)行故障分析與診斷 實驗原理模擬電路故障診斷系統(tǒng)框圖如圖5所示。圖5 模擬電路故障診斷系統(tǒng)框圖模擬電路實驗板和電路圖如圖6所示,為一個三極管典型電路,RC、RE分別為集電極、發(fā)射極電阻,RB1,RB2為基極偏置電阻。4) 穩(wěn)壓電源。圖7 模擬電路系統(tǒng)電源接線圖3) 連接和計算機(jī)數(shù)據(jù)采集卡的電纜(DB37)。圖9 模擬電路系統(tǒng)故障診斷實驗控制軟件界面6) 按“Next”命令按鈕進(jìn)入實驗控制軟件界面。正常和故障按下面所示的撥碼開關(guān)位置(撥碼開關(guān)在模擬電路系統(tǒng)實驗板右下方)。4) 模糊集的分割,填寫表10。 實驗結(jié)果分析表8 正常電路和4種故障的節(jié)點電壓值撥碼開關(guān)位置節(jié)點V_C節(jié)點V_B節(jié)點V_E(1)正常 (NOR)(2)C、E極短路 (F1)(3)電阻RE短路(F2)(4)B、C極短路 (F3)(5)電阻RC短路(F4)表9 測試向量值模糊域的劃分1) V_C00202020F20020202000202020NORF100202020F300202020F42) V_B00202020F20020202000202020F1F300202020NOR00202020F43) V_E00202020F200202020F300202020F100202020NORF4表10 模糊集分割表1231.節(jié)點V_CF2F1,F3F42.節(jié)點V_BF2F3,NORF43.節(jié)點V_EF2F3, F1(NOR)F4表11 故障的隔離表1.節(jié)點V_C1(1,2)∩(2,2)∩(3,1)2.節(jié)點V_B1(1,2)∩(2,2)∩(3,1)3.節(jié)點V_E1(1,2)∩(2,2)∩(3,1)2(1,1)與(2,1)對稱差2(1,1)與(2,1)對稱差2(1,1)與(2,1)對稱差3(2,1)3(2,1)3(2,1)4(1,2)∩(3,2)4(1,2)∩(3,2)4(1,2)∩(3,2)5(1,3)5(2,3)5(3,3)利用線性代數(shù)廣義距離的概念確定在要求的撥碼開關(guān)位置下電路采集值到各個故障模糊集的距離,確定電路的工作狀態(tài)如下:節(jié)點電壓值:(1)V_C =; (2)V_B = ; (3)V_E =SSD(NOR)=SSD(F1)=SSD(F2)=SSD(F3)=SSD(F4)=電路工作狀態(tài):電路此時發(fā)生故障F1。第三部分:總結(jié)、實驗心得雖然在本科階段學(xué)過數(shù)字電路和模擬電路,但是由于時間比較長,和理論與現(xiàn)實的差距比較大,該次實驗還是有一定的難度的。同時呢實驗中團(tuán)隊合作也非常重要,在實驗中很多東西個人的理解有偏差,而團(tuán)隊常??梢蕴峁┖侠淼慕鉀Q方案,比如布爾變量的推導(dǎo),操作過程中也可以一個人操作電腦,另外一人記錄數(shù)據(jù),經(jīng)過團(tuán)隊的良好配合,我們比較順利和比較快的完成了實驗。Further help. ation about dismissal and unfair dismissal, seeagainst 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 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 aTo find your nearest CAB, including those that give advice by , click ons 150th anniversary celebrations and will attend City39。for the racist behaviour of their fans durings actions. CSKA said they were surprised and disappointed by Toure39??傆X得自己似乎應(yīng)該去做點什么,或者寫點什么。t really grow up, it seems is not so important。 instead of letting the world soften us, we let it drive us deeper into ourselves. We try to deflect the hurt and pain by pretending it doesn’t exist, but although we can try this all we want, in the end, we can’t hide from ourselves. We need to learn to open our hearts to the potentials of life and let the world soften ,我們常常會關(guān)上心門;世界不僅沒能慰藉我們,反倒使我們更加消沉。Whenever a painful situation arises in your life, try to embrace it instead of running away or trying to mask the hurt. When the sadness strikes, take a deep breath and lean into it. When we run away from sadness that’s unfolding in our lives, it gets stronger and more real. We take an emotion that’s fleeting and make it a solid event, instead of something that passes through ,別再逃跑或隱藏痛苦,試著擁抱它吧;當(dāng)悲傷來襲時,試著深呼吸,然后直