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南通枕式包裝機的性能指標

2023-12-07(4674)次(ci)瀏(liu)覽

南通枕式包裝機自動控(kong)制(zhi)系統的(de)性(xing)(xing)能指標主要(yao)有穩(wen)定性(xing)(xing)、快速性(xing)(xing)、準確性(xing)(xing)。

1、穩定性

由于全自(zi)動(dong)包(bao)裝機自(zi)動(dong)控(kong)制系(xi)(xi)統(tong)(tong)存在慣性,當(dang)系(xi)(xi)統(tong)(tong)的(de)(de)各個參數分配不(bu)(bu)當(dang)時(shi),將(jiang)會引(yin)起系(xi)(xi)統(tong)(tong)的(de)(de)振蕩(dang)而失(shi)去工作能力。穩(wen)(wen)(wen)定(ding)性就是指動(dong)態過(guo)程的(de)(de)振蕩(dang)傾向(xiang)和系(xi)(xi)統(tong)(tong)恢(hui)復平衡狀態的(de)(de)能力。當(dang)擾(rao)動(dong)或(huo)給定(ding)值發(fa)生變化時(shi),輸出量將(jiang)會偏離原來(lai)(lai)的(de)(de)穩(wen)(wen)(wen)定(ding)值,依靠反饋作用(yong),通過(guo)全自(zi)動(dong)包(bao)裝機自(zi)動(dong)控(kong)制系(xi)(xi)統(tong)(tong)內部的(de)(de)調節作用(yong),系(xi)(xi)統(tong)(tong)隨時(shi)間不(bu)(bu)斷收(shou)斂,并回(hui)到原來(lai)(lai)的(de)(de)穩(wen)(wen)(wen)定(ding)值或(huo)跟隨給定(ding)值穩(wen)(wen)(wen)定(ding)下(xia)來(lai)(lai)。如(ru)果由于某種原因,系(xi)(xi)統(tong)(tong)出現發(fa)散而處(chu)于不(bu)(bu)穩(wen)(wen)(wen)定(ding)狀態,系(xi)(xi)統(tong)(tong)無法工作。穩(wen)(wen)(wen)定(ding)性要求是系(xi)(xi)統(tong)(tong)工作的(de)(de)首要條件。   

2、快速性

由于(yu)存在慣(guan)性或能源功率的限制,全自動包(bao)裝機自動控制系統(tong)中的各種量值(zhi)的變化不可(ke)能突變,由一(yi)個穩態過渡到新的穩態,都需(xu)要(yao)定時(shi)間,即需(xu)要(yao)經歷一(yi)個過渡過程。快速性表(biao)示系統(tong)輸(shu)出(chu)量與給定值(zhi)之間產生偏(pian)差時(shi),系統(tong)消除偏(pian)差恢復(fu)穩態的快速程度。   

3、準確性

準確性(xing)(xing)(xing)(xing)也稱靜態精度(du),指全自動包裝機自動控(kong)制系(xi)(xi)統在調整(zheng)(zheng)過程結束后輸出量與(yu)給定(ding)值(zhi)之(zhi)間的偏差,表明系(xi)(xi)統的準確程度(du),也是(shi)衡量系(xi)(xi)統工(gong)作性(xing)(xing)(xing)(xing)能的重要指標。由于(yu)受控(kong)對(dui)象的具體情況不(bu)(bu)同,不(bu)(bu)同系(xi)(xi)統對(dui)穩(wen)、準、快(kuai)的要求(qiu)(qiu)也各不(bu)(bu)相(xiang)同。例如,隨(sui)動系(xi)(xi)統對(dui)快(kuai)速性(xing)(xing)(xing)(xing)要求(qiu)(qiu)很(hen)高,而(er)調速系(xi)(xi)統則對(dui)穩(wen)定(ding)性(xing)(xing)(xing)(xing)的要求(qiu)(qiu)嚴(yan)格(ge)。同一系(xi)(xi)統性(xing)(xing)(xing)(xing)能在穩(wen)、準、快(kuai)之(zhi)間是(shi)相(xiang)互制約的,快(kuai)速性(xing)(xing)(xing)(xing)能好的系(xi)(xi)統,有可(ke)能易產生振(zhen)蕩;穩(wen)定(ding)性(xing)(xing)(xing)(xing)好的系(xi)(xi)統,調整(zheng)(zheng)過程有可(ke)能較慢,準確性(xing)(xing)(xing)(xing)也可(ke)能變差。

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