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排量伺服系統(tǒng)對(duì)液壓機(jī)械無(wú)級(jí)變速器動(dòng)態(tài)特性的影響
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    摘要:

    分別對(duì)排量伺服系統(tǒng)與液壓機(jī)械無(wú)級(jí)變速器進(jìn)行了數(shù)學(xué)建模，并且分析了各自及串聯(lián)后的頻率特性與階躍輸入響應(yīng)特性。理論分析與試驗(yàn)結(jié)果表明：排量伺服系統(tǒng)的帶寬較低，響應(yīng)較慢，在系統(tǒng)中起低通濾波器的作用；液壓機(jī)械無(wú)級(jí)變速器的帶寬較大，響應(yīng)較快，階躍輸入下系統(tǒng)出現(xiàn)超調(diào)；串聯(lián)后，由于受到排量伺服系統(tǒng)低通特性的影響，高頻信號(hào)得到衰減，系統(tǒng)帶寬變低，因此系統(tǒng)響應(yīng)速度變慢，阻尼變大，穩(wěn)定性得到了提高。

    Abstract:

    The mathematic models of displacement servo system and hydro-mechanical transmission were built respectively. Each characteristic was analyzed according to bode diagram and step- input response. The results of analysis and test showed that the band width of displacement servo system is small, so it works as low-pass filter and responds slowly, whereas the band width of hydro-transmission is larger, and it responds quickly with over control. The system of hydro-mechanical transmission connected with displacement servo system in series is influenced by displacement servo system, so its band width becomes smaller and damp becomes larger, which results in slower response speed and improved stability.  

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苑士華,魏超,胡紀(jì)濱.排量伺服系統(tǒng)對(duì)液壓機(jī)械無(wú)級(jí)變速器動(dòng)態(tài)特性的影響[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2008,39(7):27-31.[J]. Transactions of the Chinese Society for Agricultural Machinery,2008,39(7):27-31.

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