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Using xPC Target to test the control system of a nano satellite

机译：使用xPC Target测试纳米卫星的控制系统

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This paper demonstrates the use of xPC Target system to simulate the space environment for testing and verifying the control system algorithms of a nano satellite. Setup includes a Host and a Target system connected via an appropriately selected communication link. Target system is connected to a data acquisition card through PCI bus. In this paper, a satellite system with magnetic actuation using magnetorquers is considered. In the proposed setup, Simulink environment is used in the Host system to model three sensors ¿¿¿ GPS, sun sensor and magnetometer. The designed Simulink model predicts the real time space environment values for the spacecraft. These predicted values are compiled in the Host system, and output is transferred to the Target system. The Target system is configured to run Simulink at a kernel level to provide real time simulations. Data acquired at I/O ports of Target system is provided to the controller running attitude determination and control systems algorithm. The attitude values predicted by the controller are compared with the simulated sensor values, and the error rate is calculated. This error rate determines the current measure to be passed through the magnetorquer. In addition, current measure at the output is given as a feedback to the Simulink model for the prediction of the next set of sensor values. A Matlab based data acquisition tool is used to provide initial sensor readings and to monitor all the input and output parameters in real time. An analysis of complete hardware in loop simulation is described, and simulation results are provided in this paper.
机译：本文演示了使用xPC Target系统来模拟空间环境，以测试和验证纳米卫星的控制系统算法。安装程序包括一个主机和经由适当选择的通信链路连接的一个目标系统。目标系统通过PCI总线连接到数据采集卡。在本文中，考虑了使用磁矩进行磁致动的卫星系统。在建议的设置中，Simulink环境用于主机系统中，以对三个传感器，GPS，太阳传感器和磁力计进行建模。设计的Simulink模型可预测航天器的实时空间环境值。这些预测值在主机系统中编译，然后输出传输到目标系统。目标系统配置为在内核级别运行Simulink，以提供实时仿真。在目标系统的I / O端口处获取的数据将提供给控制器运行姿态确定和控制系统算法。将控制器预测的姿态值与模拟的传感器值进行比较，并计算出错误率。该错误率决定了要通过磁矩的电流测量值。此外，输出端的电流测量值作为对Simulink模型的反馈，用于预测下一组传感器值。基于Matlab的数据采集工具用于提供初始传感器读数并实时监控所有输入和输出参数。描述了完整的硬件在回路仿真中的分析，并提供了仿真结果。

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