1. dynamic model: including the dynamic model of spacecraft attitude, orbit and propulsion system.
2. Control system model: describe the control strategy and controller design of spacecraft control system.
3. Sensor model: It describes the performance and error characteristics of spacecraft sensors and is used to design observers and filters in spacecraft control system.
4. Load model: Describe the working principle and performance characteristics of the loads (such as satellites and instruments) carried by spacecraft.
5. Environmental model: Describe the environmental conditions of the spacecraft, including the earth's atmosphere, space radiation, microgravity and other factors.
6. Simulation software: By using various simulation software, the spacecraft system is modeled and simulated, and its performance and behavior are analyzed.
The following are some considerations for spacecraft system modeling:
1. model accuracy: many factors should be considered in spacecraft system modeling, and the dynamics, control, sensors and other characteristics of spacecraft should be described as accurately as possible.
2. Model simplification: When modeling, we should pay attention to avoid overly complicated and complicated models and simplify them appropriately according to actual needs, but we must not lose the effectiveness of the models.
3. Data source: The data used in modeling should come from reliable data sources, such as spacecraft test data and simulation data.
4. Software selection: The modeling software should have sufficient computing power and simulation function, such as MATLAB/Simulink, ADAMS, etc.
5. Verification and evaluation: After the modeling is completed, it must be verified and evaluated to ensure its accuracy and reliability, and the model should be revised and improved.
6. Professional knowledge: Spacecraft system modeling needs professional knowledge in many fields, such as dynamics, control and electronic technology. , and need the corresponding professional skills and knowledge background.