Tuning the PID and Bang-bang Controllers using Genetic Algorithm in Navy Satellite Communication

Given the important role of satellites in maritime communications, especially in the Global Positioning System (GPS), very high cost of the build and launch a satellite into space is the most important problem. Therefore, for each country or company, the lifetime of satellites is very important. The life of a satellite largely depends on the quality of its construction, but the most important factor that limits is the fuel which is transported. So, it should be considered to the right solution to control fuel consumption and saves it. Bang-bang controller by converting continuous control signal to a pulse train, can provide the ability to save the fuel. If the controller be more time off, the fuel savings will be more. The system is studied in this paper is modeled on European Satellite Moon Orbiter (ESMO) that not only uses the Proportional Integral Derivative (PID) controller for tracking the input pitch angle, but also uses bang-bang controller for reduce the activity of the thruster. The course of this paper is to using Genetic Algorithm (GA) for regulating parameters of mentioned controllers in this satellite. The simulation results indicate that GA has a good performance to optimization of the PID and bang-bang controllers.