Attitude determination and control system for EyasSAT for Hardware In the Loop application

[摘要] ENGLISH ABSTRACT:An Attitude Determination and Control System (ADCS) demonstrator and testing platformwas required for satellite engineering students. The ADCS demonstrator and testingplatform will allow students to develop insight into the concepts and challenges of ADCSdesign and implementation. The existing model nano-satellite EyasSAT was used as adesign platform for a new ADCS demonstrator. A new ADCS module (ADCS_V2) wasdeveloped to replace the existing EyasSAT ADCS module. The new module allows forthree-axis ADCS and the demonstration of the ADCS on an air bearing platform. The airbearing allows full freedom of movement for yaw rotations with limited pitch and roll rotations.The actuators and sensors required for the ADCS were developed and integratedinto EyasSAT. In addition a new PCB was designed to form the ADCS_V2 module. Attitudedetermination algorithms and attitude control algorithms were implemented andtested using MATLAB Simulink simulations. These algorithms were then implementedon the ADCS_V2 module. The ADCS was tested using Hardware In the Loop (HIL)techniques and an air bearing. The yaw attitude of EyasSAT could be controlled within0.4 degrees accuracy with all the sensors active. In order to stabilize the air bearingplatform, the pitch and roll angles were rate controlled. The pitch and roll rates weredamped to within 6 mrad/s.

[发布机构] Stellenbosch University