Closed-loop cabin pressure control system test method with actual pressure feedback
First Claim
1. A method for testing aircraft cabin-pressure controllers, comprising the steps of:
- simulating cabin-pressure;
producing an electrical cabin-pressure signal;
converting the electrical cabin-pressure signal to a pneumatic cabin-pressure signal;
applying the pneumatic cabin-pressure signal to a controller-under-test;
operating the controller-under-test responsively to the pneumatic cabin-pressure signal; and
producing an electric feedback responsively to operation of the controller-under-test to provide closed-loop testing of the controller-under-test.
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Accused Products
Abstract
Testing of an aircraft pressure control system may be performed without use of an altitude chamber. Aircraft cabin configuration date may be modeled and used, along with high resolution positional feedback from a simulated valve, to produce a high resolution electrical signal that may represent a simulated cabin pressure. A voltage-to-pressure transducer may convert the electrical signal to a pneumatic signal. The pneumatic signal may be employed to operate a cabin-pressure controller under test. The controller may operate an outflow valve actuator and an attached potentiometer. The potentiometer may produce a feedback signal and closed-loop testing of the aircraft pressure control system may thus be performed. The outflow valve actuator may be operated without being attached to an outflow valve because a simulated aerodynamic load may be applied to the actuator.
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Citations
10 Claims
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1. A method for testing aircraft cabin-pressure controllers, comprising the steps of:
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simulating cabin-pressure; producing an electrical cabin-pressure signal; converting the electrical cabin-pressure signal to a pneumatic cabin-pressure signal; applying the pneumatic cabin-pressure signal to a controller-under-test; operating the controller-under-test responsively to the pneumatic cabin-pressure signal; and producing an electric feedback responsively to operation of the controller-under-test to provide closed-loop testing of the controller-under-test. - View Dependent Claims (2, 3, 4, 5, 6)
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7. Apparatus for performing testing of aircraft cabin-pressure controllers comprising:
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a cabin pressure simulator for producing an electrical simulated cabin-pressure signal; a self-contained transducer for converting the electrical simulated cabin-pressure signal to a pneumatic cabin-pressure signal for application to a controller-under-test, an outflow valve actuator that is operated by the controller-under-test; a detector for producing a detector signal responsive to position of the output valve actuator; and wherein the detector signal is directed to the cabin pressure simulator so that closed-loop testing of the controller-under-test is provided. - View Dependent Claims (8, 9, 10)
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Specification