基于光惯组合的风洞尾旋试验位姿参数测量方法

Measurement on Attitude and Position of Spin Test in Wind TunnelBased on Combination of Optics and Inertia Technology

摘要:

尾旋是飞机在失速时的一种复杂而危险的非正常飞行状态。研究飞机尾旋及改出特性的常用方法是开展立式风洞尾旋试验,其中测量方法是试验中的关键技术。在十几年的发展历程中,先后经历了双目立体视觉、编码标记图像识别和惯性航姿测量的技术改进,在不断提升的过程中对测量能力和数据质量也提出了更高要求,因此发展了一种基于光惯组合技术的尾旋6自由度数据测量方法,通过惯性系统测量三维姿态,光学系统测量空间位置信息。经过试验验证,该方法成功获取了尾旋模型6自由度数据,测量效率高,数据无缺失,根据模型运动轨迹在试验段截面投影可获得尾旋半径,增加了对于尾旋现象的认知维度。

Abstract:

Spin is a kind of complicated, dangerous and abnormal flying state when airplane stalls in the air. Spin and recovery research is usually done in vertical wind tunnel test, and the measurement method is the key technology in the test. In the past decade, the technology of binocular stereo vision, coded markers image recognition and inertial navigation measurement has been adopted. In the process of continuous improvement, the measurement ability and data quality are also put forward higher requirements. Therefore, a new measurement method of 6 DOF in spin test based on combination of optics and inertia technology has been developed, and it measures attitude by inertial system and position by optical system. After test verification, the method successfully obtained 6 DOF data with high measurement efficiency and no data loss. The spin radius could be obtained by the projection of model trajectory on the cross section of wind tunnel test section, which increased the cognitive dimension of spin phenomenon.