基于LVDS的电子星模拟器设计

为了实现卫星姿轨控地面半物理仿真试验,设计了基于LVDS的电子星模拟器,图像分辨率支持1024*1024;图像位宽支持12 bit;能够同时完成帧频10 Hz的图像上传及采集;将星敏感器作为高精度姿态测量部件引入控制系统,地面动力学通过以太网将四元数提供给电子星模拟器,电子星模拟器将生成的电子星图通过LVDS传输给星敏感器,通过地面实时系统将控制系统、星务计算机、敏感器系统组成了实时仿真验证系统;试验表明电子星模的输出接近目标值,闭环测试中星敏采集到准确的星图;通过实物在闭环回路仿真验证了上述方案的有效性,并通过指标对比分析,显示了电子星模拟器的可行性,在卫星姿轨控地面半物理仿真试验中具有良好的推广性。

Design Of Electronic Star Simulator Based On LVDS

In order to realize the ground semi physical simulation test of satellite attitude and orbit control, an electronic satellite simulator based on LVDS (Low Voltage Differential Signaling) is designed, and the image resolution supports 1024 * 1024; The image bit width supports 12bit; It can upload and collect images with a frame rate of 10Hz. The star sensor is introduced into the control system as a high-precision attitude measurement component. The ground dynamics provides the quaternion to the electronic star simulator through Ethernet. The electronic star simulator transmits the generated electronic star map to the star sensor through LVDS. The real-time simulation verification system is composed of the control system, satellite computer and sensor system through the ground real-time system. The experiment shows that the output of the electronic star model is close to the target value, and the star sensor collects the accurate star map in the closed-loop test. The effectiveness of the above scheme is verified by the physical simulation in the closed-loop. Through the comparative analysis of indicators, it shows the feasibility of the electronic satellite simulator, which has good popularization in the ground semi physical simulation test of satellite attitude and orbit control.