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電液伺服油氣懸架加載系統(tǒng)控制方
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Control of Hydraulically Driven System for Hydro-pneumatic Suspension Testing
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    摘要:

    針對(duì)某重型車輛油氣混合型懸架試驗(yàn)系統(tǒng)，建立了油氣懸架負(fù)載的電液伺服驅(qū)動(dòng)力控制系統(tǒng)的數(shù)學(xué)模型,并分析了負(fù)載剛度變化對(duì)系統(tǒng)幅值裕量與相位裕量的影響，得到控制參數(shù)與負(fù)載剛度之間的關(guān)系。為了能夠提高系統(tǒng)的動(dòng)態(tài)性能，引入根據(jù)剛度變化自動(dòng)進(jìn)行增益和轉(zhuǎn)折頻率調(diào)整的二階校正環(huán)節(jié)。仿真和試驗(yàn)均表明所提方法對(duì)提高試驗(yàn)精度的有效性。

    Abstract:

    A mathematic model of electro-hydraulic servo driving force control system for a heavy vehicle hydro-pneumatic suspension was established. Through analyzing the influence of the varying stiffness of hydro-pneumatic suspension to amplitude margin and phase margin, a relationship between stiffness of the load and controller parameters was obtained. In order to improve the dynamic performance of the hydro-pneumatic suspension testing system, a two-stage correction segment was introduced which can change its gain and its turning frequency automatically according to the stiffness of the load. Simulation and experimental results both indicate the validity of the proposed control method. 

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張輝,何景峰,韓俊偉.電液伺服油氣懸架加載系統(tǒng)控制方[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2009,40(6):23-27. Control of Hydraulically Driven System for Hydro-pneumatic Suspension Testing[J]. Transactions of the Chinese Society for Agricultural Machinery,2009,40(6):23-27.

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