An electromechanical system includes a frame; a movable element; a capacitive measurement or actuation system including a first movable electrode and at least one electrode separated from the first movable electrode by a first dielectric medium; a first transmission device for transmitting movement between the movable element and the first movable electrode, the first transmission device being rotatably movable relative to the frame by a plurality of first pivot hinges; the first transmission device including a first transmission shaft having a first longitudinal axis of rotation; and a plurality of first transmission arms, each of the first transmission arms including a first end coupled to the movable element and a second end secured to the first transmission shaft; the first movable electrode being connected to the first transmission shaft.