单自由度动态太阳光模拟系统的设计与控制

Design and control of dynamical sunshine simulation system with one degree of freedom

为了给不宜翻转安装、不宜被旋转的航天太阳跟踪产品提供模拟太阳光,提出了调整反射镜姿态的动态太阳光模拟方法,设计并实现了单自由度太阳光模拟系统。系统包括太阳模拟器、运动台、平面反射镜、编码器、光栅尺、电机和控制系统等。系统通过同时调整平面反射镜的水平位移和倾角,将模拟太阳光总是投射到航天太阳跟踪系统中的太阳敏感器处,保证了航天太阳跟踪产品在模拟太阳光照试验中完全自主运动,不被转动或翻转安装,保护了航天产品中的敏感机械组件。系统建立的光照环境贴近真实太阳光照,便于航天太阳跟踪产品调试和测试。试验结果表明,单自由度太阳光模拟系统可满足航天太阳跟踪产品的测试需求,模拟太阳光入射偏差为0.6984mm。

Dynamical sunshine simulation method was proposed by controlling reflection-mirror＇s attitude in order to provide simulated sunlight for space products of solar-tracking. It is better to install space products of solar-tracking without reversing and not to rotate space products of solar-tracking. Sunshine simulation system with one degree of freedom was designed and implemented. The system included solar- simulator, moving table, reflection mirror, coder, grating ruler, motors and etc. Light from solar-simulator was always reflected to sun sensor in the space products of solar-tracking by controlling both displacement and inclination of the reflection mirror simultaneously. The space product moved by itself in the experiments of simulated, sunlight. The space product was not moved by any other devices and not installed with reversing. Thus sensitive mechanical elements in the space products for solar-tracking were protected. Simulated sunshine environment provided by the system was close to the real sunlight illumination. Convenience was provided for debugging and testing of the solar tracking device. Experiments prove that the proposed sunshine simulation system is able to provide proper simulated sunlight for space products of solar-tracking. Deviation of incoming simulated sunlight is 0.698 4 mm.