基于双模式驱动的飞行汽车起飞阶段动力匹配分析

徐斌; 田富刚

doi:10.13700/j.bh.1001-5965.2017.0279

基于双模式驱动的飞行汽车起飞阶段动力匹配分析

doi: 10.13700/j.bh.1001-5965.2017.0279

徐斌^,,
田富刚

北京航空航天大学交通科学与工程学院, 北京 100083

详细信息

作者简介:
徐斌男, 硕士, 教授。主要研究方向:发动机涡轮增压及控制技术

田富刚男, 硕士研究生。主要研究方向:飞行汽车概念设计及动力匹配

通讯作者:
徐斌, E-mail: xbacb@buaa.edu.cn

中图分类号: U469.79
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- PDF下载量: 653
- 被引次数: 0
出版历程
- 收稿日期: 2017-05-05
- 录用日期: 2017-06-30
- 网络出版日期: 2018-04-20

Power matching of flying cars during takeoff stage based on dual-mode driving

XU Bin^,,
TIAN Fugang

School of Transportation Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

More Information

Corresponding author: XU Bin, E-mail: xbacb@buaa.edu.cn

摘要

摘要:
针对折叠翼飞行汽车起飞阶段的动力匹配问题，研究了基本的动力控制策略，通过理论计算分析了起飞阶段双模式驱动特性，提出了最佳切换时刻的概念。对某型飞行汽车传动系统进行了动力匹配计算，并以该飞行汽车参数为基础，在Simulink中建立了不同工况下的行驶仿真模型，对起飞阶段行驶状态进行了仿真分析，给出了基于双模式驱动的动力匹配方案以及最佳切换时刻的选取原则。计算结果表明，通过采取双模式驱动，起飞加速时间缩短22%，起飞滑跑距离缩短13%。进一步对传动系统参数、整车设计参数以及发动机输出特性进行了优化分析，分析计算结果给出了各参数变化对起飞动力性能的影响。
- 飞行汽车 /
- 双模式驱动 /
- 最佳切换时刻 /
- Simulink仿真 /
- 参数分析
Abstract:
To solve power-matching problem during takeoff stage of folding wing flying car, the basic dynamic control strategy was studied.The dual-mode driving characteristics during takeoff stage were analyzed through theoretical calculation, and the concept of the optimal switching time was proposed.Based on the basic parameters and results of power-matching calculation of the concept car, the driving state simulation models under different working conditions were established in Simulink. According to the driving state simulation mo-dels, the simulation analyses on driving state during takeoff stage were conducted, and the dual-mode driver selection principle and optimum matching scheme of switching time were obtained.The calculation results show that the takeoff acceleration time is reduced by 22% and the takeoff distance is shortened by 13% based on dual-mode driving.The optimization analyses on transmission and vehicle parameters and variation of output characteristics were further conducted, from which the effect of the parameters on power performance during takeoff stage was obtained.
- flying car /
- dual-mode driving /
- optimal switching time /
- Simulink simulation /
- parameter analysis

HTML全文

图 1 飞行汽车起飞阶段受力示意图^[6-7]

Figure 1. Force diagram of flying car during takeoff stage^[6-7]

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图 2 发动机外特性曲线

Figure 2. External characteristic curves of engine

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图 3 起飞阶段轮胎驱动力与对应发动机转速下螺旋桨驱动力

Figure 3. Wheel driving force and propeller driving force under the same engine speed during takeoff stage

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图 4 起飞过程加速曲线

Figure 4. Accelerating curves during takeoff stage

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图 5 传动比对起飞滑跑距离的影响

Figure 5. Influence of transmission ratio on takeoff running distance

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图 6 换挡转速对加速时间和起飞滑跑距离的影响

Figure 6. Influence of shifting speed on acceleration time and takeoff running distance

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图 7 整车质量对加速时间和起飞滑跑距离的影响

Figure 7. Influence of vehicle quality on acceleration time and takeoff running distance

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图 8 滚动阻力和迎风阻力与车速的关系

Figure 8. Relationship between wheel and windward resistance and vehicle speed

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图 9 阻力系数对加速时间和起飞滑跑距离的影响

Figure 9. Influence of drag coefficient on acceleration time and takeoff running distance

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图 10 不同发动机转矩特性曲线

Figure 10. Different engine torque characteristic curves

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图 11 发动机适应性系数对切换时间和总加速时间的影响

Figure 11. Influence of engine adaptability coefficient on switching time and take-off acceleration time

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图 12 发动机适应性系数对切换时刻行驶距离和总起飞滑跑距离的影响

Figure 12. Influence of engine adaptability coefficient on running distance at switching time and running distance of take-off stage

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表 1 飞行汽车基本参数

Table 1. Main parameters of flying car

参数	数值
载荷W/N	6500
起飞速度/(km·h^-1)	110
升阻比K	10
迎风面积A/m²	2
车轮半径r/m	0.52
螺旋桨传动比i	2.43
螺旋桨直径D/m	1.8
机翼投影面积A_l/m²	9

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表 2 双模式驱动与纯螺旋桨驱动结果对比

Table 2. Comparison of results of dual-mode driving and pure propeller driving

驱动方式	加速时间/s	起飞滑跑距离/m
纯螺旋桨驱动	16.87	276
双模式驱动	13.15	240
优化率/%	22.05	13.04

下载: 导出CSV

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