一种高速响应的电动燃油泵计量控制技术研究

高山; 张家铭; 张天宏; 方鋆

doi:10.13224/j.cnki.jasp.20230388

一种高速响应的电动燃油泵计量控制技术研究

doi: 10.13224/j.cnki.jasp.20230388

南京航空航天大学能源与动力学院，南京 210016

基金项目: 国家自然科学基金（51976089）

详细信息

作者简介:
高山（1999-），男，硕士生，研究领域为多电航空发动机控制

通讯作者:
张天宏（1968-），男，教授，博士，研究领域为航空发动机建模、仿真与控制。E-mail：thz@nuaa.edu.cn

中图分类号: V233.7
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出版历程
- 收稿日期: 2023-06-15
- 网络出版日期: 2024-12-16

Research on a high dynamic electric fuel pump metering control technology

College of Energy and Power Engineering，Nanjing University of Aeronautics and Astronautics，Nanjing 210016，China

摘要

摘要:
高频动态体积流量（简称流量）精确测量成为制约多电发动机电动燃油泵计量控制的瓶颈，为此设计了一种高速响应的流量计。流量计采用计量齿轮泵-无载液压缸复合结构，设计了超行程保护旁通口和双向回位弹簧，避免了顶缸现象。基于齿轮泵转速与供油流量之间的可控特性，提出了计量泵电动机与电动泵电动机转速的协同控制策略，解决了无载液压缸型动态流量计计量范围窄的问题。建立了燃油计量系统的AMESim/Matlab联合仿真模型，分析了流量计的精度和动态性能，并研究了摩擦阻尼力对计量精度的影响。仿真结果表明：在液压缸摩擦阻尼力小于等于10 N时，流量计的计量精度能够达到0.5%，电动燃油泵闭环控制的超调量小于1.1%，调节时间为0.81 s，可以满足航空发动机控制的对燃油流量的调节需求。
- 航空发动机 /
- 动态流量计 /
- 电动燃油泵 /
- 泵-缸复合结构 /
- 协同控制
Abstract:
The precise measurement of high-frequency dynamic volumetric flow rate has become a bottleneck restricting the metering control of electric fuel pumps in multi electric engines. Therefore, a high-speed responsive flow meter was designed. The flow meter was constructed of a composite structure of a metering gear pump and an unloaded hydraulic cylinder, and was designed with an overtravel protection bypass port and a bidirectional return spring to avoid the phenomenon of cylinder jacking. Based on the controllable characteristics between the speed of the gear pump and the oil supply flow rate, a collaborative control strategy for the speed of the metering pump motor and the electric pump motor was proposed, which solved the problem of narrow measurement range of the unloaded hydraulic cylinder dynamic flow meter. An AMESim/Matlab joint simulation model for the fuel metering system was established, the accuracy and dynamic performance of the flow meter was analyzed, and the impact of friction damping on metering accuracy was studied. The simulation results showed that when the friction damping force of the hydraulic cylinder was less than or equal to 10 N, the metering accuracy of the flow meter can reach 0.5%, the overshooting of the closed-loop control of the electric fuel pump was less than 1.1%, and the adjustment time was 0.81 s, which can meet the adjustment requirements for fuel flow in aviation engine control.
- aircraft engine /
- dynamic flow meter /
- electric fuel pump /
- pump-cylinder composite structure /
- collaborative control

HTML

图 1 流量计的结构

1 伺服电动机；2 电动燃油泵；3 无刷直流电动机；4 计量泵；5 无载液压缸； 6 LVDT 位移传感器；7 双向回位弹簧；8 超行程保护旁通口；9 喷嘴。

Figure 1. Structure of flow meter

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图 2 控制方案

Figure 2. Control scheme

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图 3 传递函数模型的阶跃响应

Figure 3. Step response of transfer function

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图 4 流量计AMESim液压系统仿真模型

Figure 4. AMESim hydraulic simulation model for flow meter

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图 5 流量计Simulink控制器模型

Figure 5. Simulink controller model for flow meter

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图 6 转速协同控制

Figure 6. Coordinated speed control

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图 7 计量泵仅基于液压缸活塞位移控制

Figure 7. Metering pump is only controlled by displacement of hydraulic cylinder piston

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图 8 燃油计量结果

Figure 8. Flow metering result of fuel

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图 9 超限情况的流量计量

Figure 9. Flow metering of overlimit situation

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图 10 摩擦阻尼力为10 N时的测量结果

Figure 10. Metering results of 10 N friction force

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图 11 电动燃油泵控制

Figure 11. Electric fuel pump control

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图 12 燃油泵闭环控制

Figure 12. Fuel pump flow closed-loop control

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表 1 流量计的计量控制参数

Table 1. Measurement control parameters of flow meter

参数	数值
活塞有效作用面积A/m²	0.00165
活塞总质量m/kg	0.8
双向回位弹簧刚度K_p/（N/m）	100
黏性阻尼系数B	0.2
航空煤油的有效体积弹性模量${\beta _{\text{e}}}$/10⁹ （N/m）	1.4
计量泵的排量D_m/10⁻⁶ （m³/r）	1.5
液压缸高压腔容积V_h/m³	0.000825
液压缸泄漏系数C_pt/10⁻¹⁰ （m³/（Pa·s））	1.25
计量泵泄漏系数C_pm/10⁻¹⁰ （m³/（Pa·s））	4.5

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参考文献(18)

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