上海枕式包裝機自(zi)動控(kong)制(zhi)系統的性(xing)能指標主要有穩定性(xing)、快(kuai)速性(xing)、準(zhun)確性(xing)。

1、穩定性

由(you)于(yu)全(quan)自動(dong)包裝機自動(dong)控制(zhi)系(xi)統(tong)存在慣性(xing)，當(dang)系(xi)統(tong)的(de)(de)各個參數分配不(bu)當(dang)時，將會引起系(xi)統(tong)的(de)(de)振蕩(dang)而失(shi)去工(gong)作能力。穩(wen)定(ding)(ding)(ding)性(xing)就(jiu)是指動(dong)態過程的(de)(de)振蕩(dang)傾向和系(xi)統(tong)恢復平衡狀態的(de)(de)能力。當(dang)擾動(dong)或(huo)給定(ding)(ding)(ding)值(zhi)發生變(bian)化時，輸出量將會偏離原來(lai)的(de)(de)穩(wen)定(ding)(ding)(ding)值(zhi)，依靠(kao)反(fan)饋作用，通過全(quan)自動(dong)包裝機自動(dong)控制(zhi)系(xi)統(tong)內(nei)部的(de)(de)調節作用，系(xi)統(tong)隨時間不(bu)斷收斂，并(bing)回到原來(lai)的(de)(de)穩(wen)定(ding)(ding)(ding)值(zhi)或(huo)跟隨給定(ding)(ding)(ding)值(zhi)穩(wen)定(ding)(ding)(ding)下來(lai)。如(ru)果由(you)于(yu)某種(zhong)原因，系(xi)統(tong)出現發散而處于(yu)不(bu)穩(wen)定(ding)(ding)(ding)狀態，系(xi)統(tong)無法工(gong)作。穩(wen)定(ding)(ding)(ding)性(xing)要(yao)求是系(xi)統(tong)工(gong)作的(de)(de)首(shou)要(yao)條件。 　　

2、快速性

由于(yu)存在慣性或能源(yuan)功率(lv)的限制，全自動(dong)包裝機(ji)自動(dong)控制系統中的各種量值(zhi)的變(bian)化不(bu)可能突(tu)變(bian)，由一個穩態過(guo)渡(du)到新的穩態，都需要(yao)定時間，即需要(yao)經歷一個過(guo)渡(du)過(guo)程。快(kuai)速性表示系統輸出量與給定值(zhi)之間產(chan)生偏差時，系統消除偏差恢復穩態的快(kuai)速程度。 　　

3、準確性

準(zhun)(zhun)確性(xing)(xing)(xing)也(ye)(ye)稱靜態精度，指(zhi)全自動(dong)包裝機自動(dong)控(kong)制系(xi)統(tong)(tong)在調(diao)(diao)整(zheng)(zheng)過程(cheng)結束后(hou)輸(shu)出量(liang)與給(gei)定(ding)值之間的偏差，表明(ming)系(xi)統(tong)(tong)的準(zhun)(zhun)確程(cheng)度，也(ye)(ye)是(shi)衡(heng)量(liang)系(xi)統(tong)(tong)工作性(xing)(xing)(xing)能的重要(yao)指(zhi)標。由于受控(kong)對象的具體情況不(bu)(bu)同(tong)(tong)，不(bu)(bu)同(tong)(tong)系(xi)統(tong)(tong)對穩(wen)、準(zhun)(zhun)、快的要(yao)求也(ye)(ye)各不(bu)(bu)相同(tong)(tong)。例如，隨動(dong)系(xi)統(tong)(tong)對快速性(xing)(xing)(xing)要(yao)求很高，而(er)調(diao)(diao)速系(xi)統(tong)(tong)則對穩(wen)定(ding)性(xing)(xing)(xing)的要(yao)求嚴格。同(tong)(tong)一系(xi)統(tong)(tong)性(xing)(xing)(xing)能在穩(wen)、準(zhun)(zhun)、快之間是(shi)相互制約的，快速性(xing)(xing)(xing)能好的系(xi)統(tong)(tong)，有(you)可(ke)能易(yi)產(chan)生振(zhen)蕩;穩(wen)定(ding)性(xing)(xing)(xing)好的系(xi)統(tong)(tong)，調(diao)(diao)整(zheng)(zheng)過程(cheng)有(you)可(ke)能較慢，準(zhun)(zhun)確性(xing)(xing)(xing)也(ye)(ye)可(ke)能變差。

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