Automatic Code Generation for Spacecraft Attitude Determination and Control

Government and commercial customers are increasingly interested in robust, reusable flight software. For many spacecraft, Attitude Determination and Control Subsystem (ADCS) contributes a significant portion of the FSW. Thus refinements to ADCS code pay dividends for code development and reuse. Sierra Nevada Corporation (SNC) has recently developed an ADCS model and code set that follows model based design techniques. It uses Simulink for algorithm design and verification, a modular parameter database to customize mission profiles, and automatic code generation to create production quality embedded software. The code will be used on a LEO Earth imaging nanosat. This paper presents an overview of the algorithms, model architecture, parameter database, and code generation process.