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燃油计量活门单双腔控制优化设计方法
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国家科技重大专项(2017-V-0015-0067)


Optimal Design Method of Single and Double Cavity Control for Fuel Metering Valve
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    摘要:

    航空发动机燃油计量装置控制方式目前仍是以计量活门为主的间接式控制。为进一步研究不同间接控制方式对燃油计量装置稳定性和动态特性的影响,以电液伺服阀结合单(双)腔制方案为例进行研究。根据航空发动机燃油计量装置的物理结构及其工作原理,在AMESim仿真平台中建立单(双)腔间接控制方式的计量活门位置开环模型;通过分析单(双)腔控制结构模型的物理机制,建立由电液伺服阀输入电流至计量活门阀芯位移的开环传递函数;为验证理论模型的准确性,从时域和频域2个方面对理论模型与非线性模型进行对比验证;选取单(双)腔控制方案中的重要结构参数控制腔面积比和弹簧刚度系数,分析结构参数对计量装置稳定性和动态特性的影响。结果表明:理论推导的线性模型满足实际对模型线性化的要求,具有高可靠性;单(双)腔控制方案从稳定性上均能满足工程需求,单腔控制适合计量活门非对称设计方案,双腔控制适合计量活门在高面积比的非对称设计方案或对称设计方案。

    Abstract:

    At present, the control mode of aviation engine fuel metering device is mainly indirect control based on metering valve.In order to further study the influence of different indirect control modes on the stability and dynamic characteristics of fuel metering device, the scheme of electro-hydraulic servo valve with single (double) cavity system was taken as an example.According to the physical structure and working principle of the aviation engine fuel metering device, the open-loop model of metering valve position with single (double) cavity indirect control mode was established in AMESim simulation platform.By analyzing the physical mechanism of the single (double) cavity control structure model, the open-loop transfer function from the input current of the electro-hydraulic servo valve to the displacement of the metering valve core was established.In order to verify the accuracy of the theoretical model, it was compared with the nonlinear model in time domain and frequency domain.The important structural parameters of control cavity area ratio and spring stiffness coefficient in the single (double) cavity control scheme- were selected, and the influence of structural parameters on the stability and dynamic characteristics of the metering device was analyzed.The results show that the theoretically derived linear model meets the actual requirement of model linearization and has high reliability.The single (double) cavity control scheme can meet the engineering requirements in terms of stability, the single cavity control scheme is suitable for the asymmetric design scheme of metering valve, and the double-cavity control scheme is suitable for the asymmetric design scheme or symmetric design scheme of metering valve with high area ratio.

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陈康康,王曦,丁建军.燃油计量活门单双腔控制优化设计方法[J].机床与液压,2023,51(2):126-135.
CHEN Kangkang, WANG Xi, DING Jianjun. Optimal Design Method of Single and Double Cavity Control for Fuel Metering Valve[J]. Machine Tool & Hydraulics,2023,51(2):126-135

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  • 在线发布日期: 2023-03-02
  • 出版日期: 2023-01-28