航空摄影目标的动模拟及距离标定

Aerial photography target dynamic simlulation and distance calibration

建立航空相机的地面运动学模拟装置。为生成不同照像距离的可见光动目标,筛选了照明光路和检验方法,获取了均匀的光源。用轴向移动动目标加转动目标圆环的方法,模拟了不同照像的距离、速度、姿态的地物目标。在目标的稳速控制系统中,分析了目标的稳速精度,采用干扰观察器介入的模式,很好的抑制了负载扰动对稳速的影响,同时,对应不同速高比,为前向像移提供补偿参数。通过图像判读,相机的动态分辨率达到预定要求。结果表明,系统结构精巧,可实现的速高比范围宽,可为不同的飞行成像提供可靠的基础数据。

Aerial camera ground of kinematics simulation device is set up. In order to generate the different distance of visible moving target, screening of the illumination light phat and the test method, sniform light souce were obtained. Turn the target by a axial moving target with rotating ring, the method Simulated under different camera distance, speed, attitude of terrain target. In the steady speed control system of the target, analyses the goal of steady speed precision, using disturbance observer intervention model, good inhibiting the effects of load disturbance to the steady speed, at the same time, corresponding to the different speed ratio, for the former provides image motion comnpensation parameters. Through the image interpretation, the dynamic of the camera resolution to the expected requirements. The results show that the system structure compact, it can realize the wide range of speed ratio, can provide reliable basic data for different flight imaging.