Method and system for monitoring hydraulic accumulator pressure
AssigneeThe Boeing Company
InventorsMorgan Michael Plamondon, Bradley M. Gilmer, John Watson, Charles Filipiak
Life of this patent
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Abstract
A method is provided for determining a gas charge pressure PcalcGC of a hydraulic accumulator within a hydraulic fluid system. The method includes receiving pressure decay data representing the pressure decay within a self-pressurizing hydraulic reservoir of the hydraulic fluid system as the self-pressurizing hydraulic reservoir depressurizes from an operating pressure of the self-pressurizing hydraulic reservoir towards atmospheric pressure. The method also includes calculating the gas charge pressure PcalcGC of the hydraulic accumulator using the received pressure decay data of the self-pressurizing hydraulic reservoir.
Claims20
A method for determining a gas charge pressure PcalcGC of a hydraulic accumulator within a hydraulic fluid system, the method comprising:
- receiving pressure decay data representing the pressure decay within a hydraulic reservoir of the hydraulic fluid system as the hydraulic reservoir depressurizes from an operating pressure of the hydraulic reservoir towards atmospheric pressure;
- and
- calculating the gas charge pressure PcalcGC of the hydraulic accumulator using the received pressure decay data of the hydraulic reservoir, wherein calculating the gas charge pressure PcalcGC of the hydraulic accumulator using the received pressure decay data comprises:
- determining a rate change point within a pressure decay curve, and
- multiplying the value of a rate change point of the received pressure decay data by a reservoir area ratio RAR of the hydraulic reservoir, wherein the RAR of the hydraulic reservoir is a ratio of a surface area of a low pressure piston head to a surface area of a high pressure piston head.
A hydraulic fluid system comprising:
- a hydraulic reservoir having a low pressure chamber;
- a pressure sensor operatively connected to the low pressure chamber of the hydraulic reservoir such that the pressure sensor is configured to measure the pressure within the low pressure chamber;
- a hydraulic accumulator fluidly connected to the hydraulic reservoir;
- and
- at least one processor configured to:
- receive pressure decay data from the pressure sensor, the pressure decay data representing the pressure decay within the hydraulic reservoir as the hydraulic reservoir depressurizes from an operating pressure of hydraulic reservoir towards atmospheric pressure;
- and
- calculate a gas charge pressure PcalcGc of the hydraulic accumulator using the received pressure decay data of the hydraulic reservoir, wherein calculating the gas charge pressure PcalcGC of the hydraulic accumulator using the received pressure decay data comprises:
- determining a rate change point within a pressure decay curve, and
- multiplying the value of a rate change point of the received pressure decay data by a reservoir area ratio RAR of the hydraulic reservoir, wherein the RAR of the hydraulic reservoir is a ratio of a surface area of a low pressure piston head to a surface area of a high pressure piston head.
One or more computer storage media having computer-executable instructions for determining a gas charge pressure PcalcGC of a hydraulic accumulator within a hydraulic fluid system that, in response to execution by a processor, cause the processor to at least:
- receive pressure decay data representing the pressure decay within a hydraulic reservoir of the hydraulic fluid system as the hydraulic reservoir depressurizes from an operating pressure of the hydraulic reservoir towards atmospheric pressure;
- and
- calculate the gas charge pressure PcalcGC of the hydraulic accumulator using the received pressure decay data or the hydraulic reservoir, wherein calculating the gas charge pressure PcalcGC of the hydraulic accumulator using the received pressure decay data comprises:
- determining a rate change point within a pressure decay curve, and
- multiplying the value of a rate change point of the received pressure decay data by a reservoir area ratio RAR of the hydraulic reservoir, wherein the RAR of the hydraulic reservoir is a ratio of a surface area of a low pressure piston head to a surface area of a high pressure piston head.
Dependencies are inferred from the claim text.