== Modeling of Torquer ==

The actuator is a part of control system which implements the control law on our plant. In case of satellite, the required control torque is determined by control law. This torque is generated by passing the electric current determined by the above equation, through torquer. But it should be noted that microcontroller can provide voltage signal. Thus it is necessary to study the relation between voltage applied to torquer and current generated in it. <br \>

The torquer coil has some specific resistance R. Since it forms a loop it will also have inductance L. Thus torquer can be modelled as series L-R circuit.<br \>