Control device of an aircraft, said control device comprising at least one motorised "trim actuator" having movable anchorage, said trim actuator comprising at least one electric motor (3, 3'), at least one electronic power circuit (4, 4') for supplying electrical energy to said at least one electric motor (3, 3'), and speed reduction means for reducing the speed of rotation of a rotary shaft (9, 9') of said at least one electric motor (3, 3'), said speed reduction means making it possible to rotate an output shaft of said trim actuator at an output speed of rotation that is less than an input speed of rotation of said rotary shaft (9, 9') of said at least one electric motor (3, 3'), characterised in that said control device implements three separate servo loops that are nested in one another, said three servo loops being formed by an electric current servo loop, a speed servo loop and a force servo loop, and in that: said electric current servo loop comprises: - at least one electric current probe (21, 21', 21") that is arranged at the input of said at least one electric motor (3, 3') and is intended for measuring a value of an electrical energy electrical supply current provided by said at least one electronic power circuit, and - at least one first position sensor that is arranged on said rotary shaft (9, 9') of said at least one electric motor (3, 3') and is intended for measuring an angular position of said rotary shaft (9, 9') relative to a fixed frame of said trim actuator, said speed servo loop comprises: - at least one second position sensor that is arranged on said output shaft of said trim actuator and is intended for measuring an angular position of said output shaft relative to said fixed frame of said trim actuator, - an output branch that is connected to an input of said electric current servo loop, said force servo loop comprising: - at least one force sensor that is arranged in the region of at least one flight control member and is intended for measuring an external force exerted on said at least one flight control member, - an output line that is connected to an input of said speed servo loop. said electric current servo loop comprises: - at least one electric current probe (21, 21', 21") that is arranged at the input of said at least one electric motor (3, 3') and is intended for measuring a value of an electrical energy electrical supply current provided by said at least one electronic power circuit, and - at least one first position sensor that is arranged on said rotary shaft (9, 9') of said at least one electric motor (3, 3') and is intended for measuring an angular position of said rotary shaft (9, 9') relative to a fixed frame of said trim actuator, - at least one electric current probe (21, 21', 21") that is arranged at the input of said at least one electric motor (3, 3') and is intended for measuring a value of an electrical energy electrical supply current provided by said at least one electronic power circuit, and - at least one first position sensor that is arranged on said rotary shaft (9, 9') of said at least one electric motor (3, 3') and is intended for measuring an angular position of said rotary shaft (9, 9') relative to a fixed frame of said trim actuator, said speed servo loop comprises: - at least one second position sensor that is arranged on said output shaft of said trim actuator and is intended for measuring an angular position of said output shaft relative to said fixed frame of said trim actuator, - an output branch that is connected to an input of said electric current servo loop, - at least one second position sensor that is arranged on said output shaft of said trim actuator and is intended for measuring an angular position of said output shaft relative to said fixed frame of said trim actuator, - an output branch that is connected to an input of said electric current servo loop, - at least one force sensor that is arranged in the region of at least one flight control member and is intended for measuring an external force exerted on said at least one flight control member, - an output line that is connected to an input of said speed servo loop.