动力翼伞系统空投风场的辨识与应用
收稿日期: 2016-01-07
修回日期: 2016-03-21
网络出版日期: 2016-03-24
基金资助
国家自然科学基金(61273138);天津市重点基金(14JCZDJC39300)
Wind identification and application of powered parafoil system
Received date: 2016-01-07
Revised date: 2016-03-21
Online published: 2016-03-24
Supported by
National Natural Science Foundation of China (61273138); Key Fund of Tianjin (14JCZDJC39300)
风场对动力翼伞系统的运动状态有着重要的影响,获得风场中风的速度和方向可以使动力翼伞系统利用或者消除风场的影响。针对风场辨识问题,通过分析动力翼伞系统在风场作用下的飞行特性,提出了一种基于动力翼伞系统在风中的飞行状态进行风场辨识的方法。该方法仅使用动力翼伞系统配备的全球定位系统(GPS)模块采集定位数据,计算获得动力翼伞系统飞行的速度和方向,根据风场与动力翼伞系统的动态关系,利用最小二乘法对风场进行在线辨识。为了保证辨识精度,由GPS获得的动力翼伞系统运动信息经卡尔曼滤波器进行滤波处理。仿真结果表明:该方法对风场有较高的辨识效果,并能辅助实现雀降。
檀盼龙 , 孙青林 , 高海涛 , 陈增强 . 动力翼伞系统空投风场的辨识与应用[J]. 航空学报, 2016 , 37(7) : 2286 -2294 . DOI: 10.7527/S1000-6893.2016.0091
Wind factor has an important influence on dynamics of the powered parafoil system. The identification of wind speed and direction is the key point for the powered parafoil system to take advantage of wind or to eliminate wind impact. By analyzing the dynamic characteristics of the powered parafoil in wind field, a wind identification method based on the powered parafoil dynamics is proposed and applied to solve this problem. The proposed method utilizesthe positioning data from global positioning system (GPS) to compute the velocity and direction of the powered parafoil system, which is only necessary for wind identification. Wind speed and direction are identified in real-time according to the dynamic relationship between the wind field and the powered parafoil system by using the least square method. To improve identification accuracy, the collection of motiondata obtained by GPS is applied to identify current wind speed and direction after being processed by Kalman filter. Simulation results show that the proposed method is sufficient to handle wind identification problem with high accuracy. And the identification result supports flare-landing.
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