Flight lock actuator with dual energy sources
First Claim
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1. A method for providing improved reliability in an aircraft door flight lock actuator comprising:
- storing energy in a mechanical energy storage means and an electrical energy storage means;
powering the actuator using the energy stored in the mechanical energy storage means and the electrical energy storage means to complete an unlocking stroke in the absence of aircraft power wherein the door remains closed during unlocking; and
controlling a linear velocity of the actuator.
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Abstract
A flight-lock actuator that can be powered by two sources of stored energy when aircraft power has been switched off. A mechanical energy storage device and an electrical energy storage device provide a fully redundant energy storage system that stores sufficient energy to complete the actuator'"'"'s extension stroke when aircraft power is removed. The actuator has a motor control system that limits the stroke velocity for both the extension and retraction strokes, including a damper feature capable of effectively braking the actuator during the back-driven extension stroke.
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Citations
8 Claims
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1. A method for providing improved reliability in an aircraft door flight lock actuator comprising:
- storing energy in a mechanical energy storage means and an electrical energy storage means;
powering the actuator using the energy stored in the mechanical energy storage means and the electrical energy storage means to complete an unlocking stroke in the absence of aircraft power wherein the door remains closed during unlocking; and
controlling a linear velocity of the actuator. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- storing energy in a mechanical energy storage means and an electrical energy storage means;
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8. A system for providing improved reliability in an aircraft door flight lock actuator comprising:
- a means for storing energy in a mechanical energy storage means;
a means for storing electrical energy;
a lock actuator using the energy stored in the mechanical energy storage means and the electrical energy storage means to complete an unlocking stroke in the absence of aircraft power wherein the door remains closed during unlocking; and
a means for controlling a linear velocity of the actuator.
- a means for storing energy in a mechanical energy storage means;
Specification