Active Magnetic Control System for Gravity Gradient Stabilized Spacecraft Using Fuzzy Controllers

This primary purpose of this work was to develop control laws for three axis stabilization of a magnetic actuated satellite with a passive gravity gradient boom. the satellite shall be three axis stabilized with its boom pointing outwards. This was achieved by classical linearized control of satellite. in addition to a theoretical treatment, the theses contain a large portion of application considerations. Stability analysis was done to find the moment of inertia of a satellite, in order to reach the passive gravity gradient control with boom. The control concept considered was that interaction between the earth’s magnetic field and a magnetic field generated by a set of coils in the satellite can be used for actuation. magnetic torquing was found attractive for generation of control torques on small satellites. Since magnetic control systems are relatively lightweight, require low power and are inexpensive. However, this principle is inherently none linear and difficult to use, classical linearized control and fuzzy controllers were used to stabilized the satellite and their performance was tested via simulation.