枕式包裝機自動控(kong)制系統的(de)性能指(zhi)標(biao)主要(yao)有穩定性、快速性、準確性。

1、穩定性

由于全自動包裝機(ji)自動控制系(xi)統(tong)(tong)(tong)(tong)存在(zai)慣性(xing)，當系(xi)統(tong)(tong)(tong)(tong)的各個參數分配不當時(shi)，將會(hui)引起系(xi)統(tong)(tong)(tong)(tong)的振(zhen)蕩而(er)失去工作(zuo)能力。穩(wen)(wen)定(ding)(ding)性(xing)就(jiu)是指動態過程的振(zhen)蕩傾向和系(xi)統(tong)(tong)(tong)(tong)恢復平衡狀態的能力。當擾動或(huo)給(gei)定(ding)(ding)值發生(sheng)變化時(shi)，輸出量將會(hui)偏(pian)離原(yuan)來的穩(wen)(wen)定(ding)(ding)值，依(yi)靠反饋(kui)作(zuo)用(yong)，通過全自動包裝機(ji)自動控制系(xi)統(tong)(tong)(tong)(tong)內(nei)部的調節作(zuo)用(yong)，系(xi)統(tong)(tong)(tong)(tong)隨時(shi)間不斷收斂，并回到原(yuan)來的穩(wen)(wen)定(ding)(ding)值或(huo)跟隨給(gei)定(ding)(ding)值穩(wen)(wen)定(ding)(ding)下來。如果由于某種原(yuan)因，系(xi)統(tong)(tong)(tong)(tong)出現發散而(er)處于不穩(wen)(wen)定(ding)(ding)狀態，系(xi)統(tong)(tong)(tong)(tong)無法工作(zuo)。穩(wen)(wen)定(ding)(ding)性(xing)要(yao)(yao)求是系(xi)統(tong)(tong)(tong)(tong)工作(zuo)的首(shou)要(yao)(yao)條(tiao)件。 　　

2、快速性

由(you)于存在慣性(xing)或能(neng)源功(gong)率的限制，全自(zi)動(dong)包裝(zhuang)機自(zi)動(dong)控制系(xi)(xi)統(tong)中的各種量(liang)值的變化不可能(neng)突變，由(you)一個(ge)穩(wen)態(tai)過渡到新的穩(wen)態(tai)，都需要定(ding)時(shi)間，即需要經歷一個(ge)過渡過程。快速(su)性(xing)表示(shi)系(xi)(xi)統(tong)輸出量(liang)與(yu)給(gei)定(ding)值之(zhi)間產生偏差時(shi)，系(xi)(xi)統(tong)消除偏差恢復穩(wen)態(tai)的快速(su)程度。 　　

3、準確性

準確性(xing)(xing)也稱靜態精度，指全自動(dong)包裝(zhuang)機自動(dong)控(kong)制(zhi)系(xi)(xi)(xi)(xi)統(tong)在(zai)調(diao)整(zheng)過(guo)程(cheng)結束后輸出量(liang)與給定(ding)值之間的(de)偏差(cha)，表明系(xi)(xi)(xi)(xi)統(tong)的(de)準確程(cheng)度，也是衡(heng)量(liang)系(xi)(xi)(xi)(xi)統(tong)工作性(xing)(xing)能(neng)的(de)重要(yao)指標。由于受控(kong)對象的(de)具(ju)體情況(kuang)不同(tong)，不同(tong)系(xi)(xi)(xi)(xi)統(tong)對穩(wen)、準、快的(de)要(yao)求也各不相同(tong)。例如，隨動(dong)系(xi)(xi)(xi)(xi)統(tong)對快速性(xing)(xing)要(yao)求很高，而調(diao)速系(xi)(xi)(xi)(xi)統(tong)則對穩(wen)定(ding)性(xing)(xing)的(de)要(yao)求嚴格(ge)。同(tong)一(yi)系(xi)(xi)(xi)(xi)統(tong)性(xing)(xing)能(neng)在(zai)穩(wen)、準、快之間是相互制(zhi)約的(de)，快速性(xing)(xing)能(neng)好(hao)的(de)系(xi)(xi)(xi)(xi)統(tong)，有可(ke)能(neng)易產(chan)生(sheng)振蕩;穩(wen)定(ding)性(xing)(xing)好(hao)的(de)系(xi)(xi)(xi)(xi)統(tong)，調(diao)整(zheng)過(guo)程(cheng)有可(ke)能(neng)較慢，準確性(xing)(xing)也可(ke)能(neng)變差(cha)。

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