| 主权项 |
1. A control device for controlling a variable section nozzle of an aircraft power plant, said variable section nozzle comprising one or several movable parts configured to modify the nozzle section and connected by a mechanical transmission chain to an actuator, said control device comprising:
a regulation system configured to regulate the aircraft power plant connected to a control member configured to control the actuator, characterized in that the control device comprises a single said control member, an immobilization unit configured to immobilize all the one or several movable parts which are deactivated only when the regulation system controls the positional change of the one or several movable parts, and a determination unit configured to determine the actual position of the one or several movable parts, wherein: the immobilization unit is controlled by one of: (i) the control member, with a connection being provided between the immobilization unit and the control member, and the control member simultaneously transmitting a signal to the actuator to displace the one or several movable parts and to the immobilization unit which subsequently switches to the deactivated state, whereby in an event that the control member is defective because of an electrical power failure or an internal malfunction, no signal is transmitted to the immobilization unit which remains in the activated state, and (ii) the regulation system, with a connection being provided between the immobilization unit and the regulation system, wherein when the regulation system transmits an electrical signal to the control member to cause the movement of the one or more movable parts, the regulation system simultaneously transmits in parallel a signal to the immobilization unit to deactivate the immobilization unit. |
