Design and Verification of the Control Procedure of Attitude Determination and Control Subsystem for Nanosatellite

  • 林 庭揚

Student thesis: Master's Thesis

Abstract

This thesis depict the design and verification of the control procedure for PHOENIX nanosatellite For QB50 mission the main objective of PHOENIX is to conduct the research with respect to the lower atmosphere and study the atmospheric re-entry process associated with aerothermodynamics phenomena According to this objective the control procedure for three-axis stabilization is necessary that software can aid PHOENIX to reorient to the desired attitude For confirming designed control procedure the investigation of simulation models including physical models estimators and controllers is essential in order to build a simulation environment based on MATLAB/Simulink In this thesis the simulation interface based on MATLAB/Simulink is intuitive and flexible to develop control program and display graphical results Typically the attitude determination and control subsystem (ADCS) are divided two parts including attitude determination to estimate the current attitude and attitude control to properly adjust the attitude Regarding the attitude determination Rate Kalman Filter (RKF) and Unscented Kalman Filter (UKF) with sun sensor nadir sensor magnetometer and rate sensor will be utilized to estimate the satellite’s attitude and angular velocity For attitude control magnetic control and single axis wheel control are considered within the control procedure due to the limitation of equipped actuators Rate control B-dot control and cross product control all belong to magnetic control and will be implemented for angular rates control With single axis wheel control the bias momentum method will be used to complete three-axis stabilization control The control procedure employs all of above filters and control laws to stabilize the satellite and they are verified by the simulation built in this thesis
Date of Award2014 Aug 8
Original languageEnglish
SupervisorJyh-Chin Juang (Supervisor)

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