CAJ | 학술논문

为测定弹丸的瞬时速度与姿态,利用标定过的线阵像机,在镜面摄像法下从2个视角对运动中的弹丸进行扫描成像.在研究了线阵像机的动态成像方程后,利用若干个目标特征点和对应的图像点,建立测量问题数学模型;通过两步法求解出弹丸的速度、姿态和初始位置8个参数.对不同像机参数下的不同弹丸几何尺寸和不同的运动姿态参数进行了图像仿真和测量实验,结果表明算法的姿态测量误差优于0.4°,合速度的相对测量误差优于2%.利用线阵像机成像模型和最优化算法测量弹丸速度与姿态参数具有较高的精度.
위측정탄환적순시속도여자태,이용표정과적선진상궤,재경면섭상법하종2개시각대운동중적탄환진행소묘성상.재연구료선진상궤적동태성상방정후,이용약간개목표특정점화대응적도상점,건립측량문제수학모형;통과량보법구해출탄환적속도、자태화초시위치8개삼수.대불동상궤삼수하적불동탄환궤하척촌화불동적운동자태삼수진행료도상방진화측량실험,결과표명산법적자태측량오차우우0.4°,합속도적상대측량오차우우2%.이용선진상궤성상모형화최우화산법측량탄환속도여자태삼수구유교고적정도.
To obtain the instantaneous speed and attitude of projectile,with the help oi a mlrror,a calibrated linear camera wasused to grab a pair of scan images from two views. After the study of linear camera＇s dynamic imaging model, several object points and corresponding image points were used to build a mathematical model for the measurement, and then a two-step method was used to work out projectile＇s speed, attitude and initial position, which were described by eight parameters. Aiming at different sizes and different attitude parameters of projectile under different parameters of camera,imaging simulation and measurement test were carried out. The result shows that the error for object＇s attitude is less than 0.4°, and the relative error for speed is less than 2%. Projectile＇s speed and attitude measured by the imaging model of linear camera and optimization method have high accuracy.