CAJ | 학술논문

在利用激光测量飞行器姿态参数的实验中,当测量光线穿过飞行器所产生的射流场时,场内气体光折射率不同而使光路发生弯曲,从而对测量结果造成影响.本文根据空气射流动力学原理,对飞行器周围射流场内气体的光折射率分布规律进行分析,建立简化模型,并以此得出影响测量误差的相应因素,估算出测量光束弯曲的角度偏差,从而对测量结果进行修正;同时可以提高系统的测量精确性,对测量系统的设计有所帮助.模拟试验结果表明,该计算方法可以有效的计算出测量结果的误差.
재이용격광측량비행기자태삼수적실험중,당측량광선천과비행기소산생적사류장시,장내기체광절사솔불동이사광로발생만곡,종이대측량결과조성영향.본문근거공기사류동역학원리,대비행기주위사류장내기체적광절사솔분포규률진행분석,건립간화모형,병이차득출영향측량오차적상응인소,고산출측량광속만곡적각도편차,종이대측량결과진행수정;동시가이제고계통적측량정학성,대측량계통적설계유소방조.모의시험결과표명,해계산방법가이유효적계산출측량결과적오차.
In laser measurement for aircraft position parameters, when laser-beam passes through gas field produced by aircraft, the beam curves due to different refractive index in gas fluid field, which influences measurement result. This paper analyses the distribution regularity of refraction index in gas fluid field based on aerodynamics theory, establishes the simplified mathematical model, presents the factors causing the measurement errors, calculates the errors of laser beam curve and corrects the measurement result. This method improves the accuracy of measurement system and benefits the system design. Experimental results show that the method can calculate the errors of measurement results effectively.