Three-axis Stabilized Satellite Attitude Determination And Attitude Control System

Attitude Determination and Control is a key aspect of satellite technology and application. With widespread use of application satellite, people pay more and more attention to high accuracy and durability Attitude Determination and Control System (ADCS). The paper-'Studies on the Attitude Determination and Control System of Three-Axis Stabilized Satellite', taking a specific meteorological satellite as an example, studies systematically and all-around the design and realization of an ADCS for an three-axis stabilized satellite. Some further research is done in the field of attitude determination algorithms, attitude control laws. The main work done is as follows: Attitude Determination Subsystem: In order to improve accuracy, data from attitude sensor is usually processed by some methods. Kalman filtering is one of widely use method. Based on Kalman filtering, designs in detail two attitude determination subsystems, one consists of gyroscope, infrared earth sensors and solar sensors and another consists of magnetometer, infrared earth sensors and solar sensors, using Extended Kalman filter for a specific satellite, including sensor allocation, algorithm modeling, simulation evaluation, and so on. Attitude Control Subsystem: because of high accuracy, durability and anti-jamming, flywheel is important control system used in satellite. In accordance with bias flywheel system, based on classicality control theory, a PID control law for pitching and non-least phase control law for rolling-yawing are developed. To bias flywheel system, based on variable structure control theory, an uncoupled variable structure control law is?developed. Control law stability and robustness are analyzed at the same time. Because vibration of appendages cannot be ignored, control problem for satellites with flexible appendages is discussed from the point of engineering in addition. Attitude Determination and Control System (ADCS) Design: On the basis of above research work, taking a meteorological satellite design as background, this part describes the whole ADCS design and simulation evaluation. The simulation results of normal on-orbit mode demonstrate the feasibility and accuracy of ADCS designed in this part.