Electric propulsion is a mature and widely used technology in modern spacecraft applications. This kind of propulsion has strongly demonstrated its main advantages both analytically and in-flight experimentally. However, during a mission the need to control the thrust vector may arise, since the displacement of the center of gravity may be caused by the propellant consumption and the rotation of solar arrays. Thus, the ability control the thrust vector orientation opens new possibilities for mission optimization; 8-10 degrees in all directions are sufficient to satisfy current needs. Normally, the thrust vector control (TVC) is achieved by mounting the thruster on a mechanically actuated gimbal platform or robotic arms; these techniques are found to be heavy and expensive, and may affect the overall reliability of the system.