基于多普勒频移的光学大气测速系统设计

龙彦志; 梁应剑; 黄巧平; 孙筱逸; 吴梅

doi:10.13700/j.bh.1001-5965.2018.0204

基于多普勒频移的光学大气测速系统设计

doi: 10.13700/j.bh.1001-5965.2018.0204

中国航空工业集团有限公司成都凯天电子股份有限公司, 成都 610091

基金项目:

中航工业技术创新基金 2012D16132

详细信息

作者简介:
龙彦志男, 硕士, 工程师。主要研究方向:大气数据技术

通讯作者:
龙彦志, E-mail: 13540751048@163.com

中图分类号: TP79
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- 文章访问数: 992
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- PDF下载量: 414
- 被引次数: 0
出版历程
- 收稿日期: 2018-04-11
- 录用日期: 2018-07-06
- 网络出版日期: 2018-12-20

Design of optical airspeed measurement system based on Doppler shift

AVIC Chengdu CAIC Electronics Co., Ltd., Chengdu 610091, China

Funds:

AVIC Technology Innovation Foundation 2012D16132

More Information

Corresponding author: LONG Yanzhi, E-mail: 13540751048@163.com

摘要

摘要:
为解决直升机大气数据系统中采用传统空速测量方法所带来的缺陷，提出了一种基于光学原理的大气测速系统实现方案和一种矢量风速及大气数据的快速分解反演方法，并基于该方案设计了光学大气测速系统。该系统根据大气中气溶胶粒子米散射和多普勒效应原理，优化了系统受感器、解调器和高速信号采集处理方案。通过仿真验证了该系统性能指标，系统最大前向可探测空速可达450 km/h，真空速探测精度优于±1 km/h。利用搭建的光学测速试验样机进行地面跑车试验，并与传统的空速测量系统进行对比分析，验证了本文方法和系统的有效性和可靠性。
- 大气参数 /
- 直升机 /
- 传感器 /
- 三轴空速测量 /
- 集成
Abstract:
In order to solve the defect within traditional airspeed measurement method adopted by helicopter air data system, this paper presents a scheme of airspeed measurement system based on optical and a rapid inversion method of airspeed vector with other airdata. An optical airspeed measurement system is designed based on this method. According to the principle of Mie scattering of aerosol and Doppler effect, the sensor, demodulator and high-speed signal acquisition and processing scheme is optimized in the system. The performance of the system was verified by computer simulation, in which the maximum forward detectable airspeed of the system can reach 450 km/h, and the detection accuracy of true airspeed can be better than ±1 km/h. The optical airspeed measurement system prototype is tested on ground vehicle to compare with the traditional airspeed measurement system, and the effectiveness and reliability of the proposed method and the optical airspeed measurement system are verified.
- atmospheric parameter /
- helicopter /
- sensor /
- three-axis airspeed measurement /
- integration

HTML全文

图 1 受感器组件坐标系定义

Figure 1. Definition of sensor component coordinate system

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图 2 系统结构

Figure 2. System architecture

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图 3 光学天线结构及仿真

Figure 3. Optical antenna structure and simulation

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图 4 预处理计算流程

Figure 4. Preprocessing calculation flowchart

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图 5 系统性能仿真结果

Figure 5. System performance simulation results

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图 6 系统实物图

Figure 6. Picture of system

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图 7 三光轴测速结果

Figure 7. Three-optical-axis speed measurement results

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图 8 三轴空速解算结果

Figure 8. Three-axis airspeed calculation results

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图 9 真空速解算结果

Figure 9. True airspeed calculation results

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图 10 攻角、侧滑角解算结果

Figure 10. Calculation results of angle of attack andangle of sideslip

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表 1 解算角度实测分析

Table 1. Actual measurement analysis of angle calculation

角度	时间/s	误差/(°)	均方误差/(°)
攻角	0~1200	1.19	2.93
	1200~2400	0.53	2.94
	2400~3600	0.17	2.84
	3600~4800	4.22	6.75
侧滑角	0~1200	2.81	3.94
	1200~2400	1.08	2.97
	2400~3600	1.11	3.79
	3600~4800	1.53	3.70

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参考文献(15)

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