Abstract
A semi-physical simulation platform for attitude determination and control system is proposed to verify the attitude estimator and controller on ground. A simulation target, a host PC, many attitude sensors, and actuators compose the simulation platform. The simulation target is composed of a central processing unit board with VxWorks operating system and many input/output boards connected via Compact Peripheral Component Interconnect bus. The executable programs in target are automatically generated from the simulation models in Simulink based on Real-Time Workshop of MATLAB. A three-axes gyroscope, a three-axes magnetometer, a sun sensor, a star tracer, three flywheels, and a Global Positioning System receiver are connected to the simulation target, which formulates the attitude control cycle of a satellite. The simulation models of the attitude determination and control system are described in detail. Finally, the semi-physical simulation platform is used to demonstrate the availability and rationality of the control scheme of a micro-satellite. Comparing the results between the numerical simulation in Simulink and the semi-physical simulation, the semi-physical simulation platform is available and the control scheme successfully achieves three-axes stabilization.
Highlights
Attitude determination and control system (ADCS) is the core subsystem of satellite mission
An experiment of ADCS semi-physical simulation for a sun synchronous micro-satellite is constructed based on the platform described in section ‘‘ADCS semi-physical simulation system design.’’ The aim of the microsatellite control system is to control the attitude of body frame with respect to orbit frame
A semi-physical simulation platform used for the ADCS is described
Summary
Attitude determination and control system (ADCS) is the core subsystem of satellite mission. In Lin et al.,[2] the simulations of the ADCS in MATLAB and Simulink are developed, which include physical models, estimators, and controllers. The semi-physical simulation for ADCS is a kind of control cycle experiment under the simulated dynamic and environment.
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