【摘要】 应用65个无穷远目标模拟天区恒星,建立天区恒星坐标系,将J2000.0天球坐标系中恒星坐标转换成星模拟器坐标,通过计算平行光管光轴指向,设计光管安装基座,将所有平行光管按照计算结果放置于光管安装基座上,每个平行光管目标源模拟相应恒星位置。星等调节通过利用占空比调节的可调恒流驱动技术来实现,通过控制占空比,调整LED光源输出照度模拟不同恒星星等。在视场20°×40°范围内,通过对星等和星角距的标定,恒星相对位置模拟精度优于2.48″,星等误差优于4.7%,在±1.5 Mv范围内可调。连续工作4 h,模拟星的照度变化小于6.7%,位置精度无明显变化。更多还原

【Abstract】 Application of 65 stars at infinity target simulation region establishment day stars area coordinate system,the J2000.0 celestial coordinate system coordinate,coordinate transformation into stars in star simulator parallel light pipe axis by calculation,design of light pipe installation pedestal,placing all of parallel light pipe according to the calculation results light pipe installation pedestal,each parallel light pipe target source simulating star position accordingly. Magnitude regulation is realized by using the adjustable constant-current drive technology of duty cycle regulation. By controlling the duty cycle,the output illumination of LED light source is adjusted to simulate the magnitude of different stars. Within the field of view of 20°×40°,the calibration of magnitude and angular distance shows that the simulation accuracy of relative position of the star is better than 2.48 ″,and the magnitude error is better than 4.7%,adjustable within ±1.5 Mv. Working continuously for 4 hours,the illuminance change of the simulated star is less than 6.69%,with no significant change in position accuracy.更多还原