LEAKAGE DETECTION AND FLUID LEVEL PROGNOSTICS FOR AIRCRAFT HYDRAULIC SYSTEMS
First Claim
Patent Images
1. A method of detecting and predicting hydraulic fluid leakage for an aircraft hydraulic system comprising:
- sensing at least one parameter associated with said hydraulic system;
determining, at least in part in response to said sensed parameter, an estimated value indicative of total fluid level or mass;
combining said estimated value with at least some historical values to provide a prediction for the future value of total quantity indication; and
displaying an indication at least in part associated with said leakage.
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Abstract
A method for detecting and predicting total hydraulic fluid level for aircraft hydraulic systems includes determining an estimated value for a parameter indicative of total fluid level or mass. Each new value is combined with an historical indication (e.g., from previous flights) to provide a prediction for the future value of total quantity indication. With the same combination, one can provide an estimated value for total system leakage or level loss. An alert can be generated if hydraulic fluid level or mass is predicted to fall below a predetermined level.
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Citations
17 Claims
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1. A method of detecting and predicting hydraulic fluid leakage for an aircraft hydraulic system comprising:
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sensing at least one parameter associated with said hydraulic system; determining, at least in part in response to said sensed parameter, an estimated value indicative of total fluid level or mass; combining said estimated value with at least some historical values to provide a prediction for the future value of total quantity indication; and displaying an indication at least in part associated with said leakage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An aircraft hydraulic system comprising:
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a fluid reservoir; a device the pressurizes fluid from said reservoir; at least one hydraulic line that delivers said pressurized fluid supplied by said fluid reservoir to at least one pressure consumer; at least one sensor that senses at least one parameter associated with said pressurized fluid and/or said reservoir; an estimator that determines, at least in part in response to said sensed parameter, an estimated value indicative of total fluid level or mass; a combiner that combines said estimated value with an historical indication to provide a prediction for the future value of total quantity indication; and a display that displays an indication at least in part associated with said total quantity indication. - View Dependent Claims (13, 14, 15, 16)
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17. A method of detecting and predicting hydraulic fluid leakage for an aircraft hydraulic system comprising:
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during a current flight, sensing at least one parameter associated with the aircraft hydraulic system; determining, at least in part in response to said sensed parameter, an estimated value indicative of total fluid level or mass; combining said estimated value with at least some historical values from previous flights to provide a prediction for the future value of total quantity indication; and displaying an alert if said prediction indicates that sufficient leakage will occur to cause hydraulic fluid level or mass to fall below a predetermined level.
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Specification