Use of wattmeter to obtain diagnostics of hydraulic system during transient-state start-up operation
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F04B-049/06
F15B-001/02
F04B-049/00
출원번호
US-0117290
(2011-05-27)
등록번호
US-9091262
(2015-07-28)
발명자
/ 주소
Runkle, Mark Andrew
출원인 / 주소
General Electric Company
대리인 / 주소
Cusick, Ernest G.
인용정보
피인용 횟수 :
0인용 특허 :
7
초록▼
Disclosed herein is an approach that uses a wattmeter to obtain diagnostics of a hydraulic system during transient-state start-up operation. In one aspect, a controller uses the electric power measured by the wattmeter during the transient-state start-up operation to determine fluid flow parameters.
Disclosed herein is an approach that uses a wattmeter to obtain diagnostics of a hydraulic system during transient-state start-up operation. In one aspect, a controller uses the electric power measured by the wattmeter during the transient-state start-up operation to determine fluid flow parameters. In another aspect, the controller determines diagnostics for the hydraulic fluid consuming device and the hydraulic pump unit as a function of the fluid flow parameters.
대표청구항▼
1. A system, comprising: a hydraulic fluid consuming device;a hydraulic pump unit that provides hydraulic fluid to the hydraulic fluid consuming device, the hydraulic pump unit including a pump unit and at least one accumulator that are configured to deliver the hydraulic fluid to the hydraulic flui
1. A system, comprising: a hydraulic fluid consuming device;a hydraulic pump unit that provides hydraulic fluid to the hydraulic fluid consuming device, the hydraulic pump unit including a pump unit and at least one accumulator that are configured to deliver the hydraulic fluid to the hydraulic fluid consuming device;a wattmeter that measures the electric power consumption by the hydraulic pump unit during a transient-state start-up operation in which the hydraulic pump unit turns on to deliver the hydraulic fluid to the hydraulic fluid consuming device and thereafter replenish the accumulator for a predetermined amount of time; anda controller that uses the electric power consumption measured by the wattmeter during the transient-state start-up operation to determine fluid flow parameters from the operation of the pump unit and the at least one accumulator, wherein the fluid flow parameters comprise power delivered to the hydraulic fluid by the hydraulic pump unit and volumetric flow rates,the controller determining the power delivered to the hydraulic fluid by the hydraulic pump unit by reference to power consumption that occurs above a minimum trigger power level, the minimum trigger power level representing a minimum power difference above a floor power level that represents the transient-state start-up operation and which indicates that the hydraulic fluid consuming device is starting to consume hydraulic fluid,wherein the controller determines a plurality of diagnostics for the hydraulic fluid consuming device and the hydraulic pump unit as a function of the fluid flow parameters, including estimating an internal pressure and hydraulic storage amount of the at least one accumulator using a polytropic gas relationship and the predetermined amount of time, respectively, which estimate the at least one accumulator's condition relative to an initial internal pressure and available hydraulic fluid storage amount of the at least one accumulator. 2. The system according to claim 1, wherein the transient-state start-up operation comprises the hydraulic fluid consuming device making a demand for hydraulic fluid, the demand for hydraulic fluid causing a pressure drop in the hydraulic pump unit, the pump unit and the at least one accumulator responding to the pressure drop by delivering the hydraulic fluid to the hydraulic fluid consuming device, the at least one accumulator delivering the hydraulic fluid until the demand for hydraulic fluid by the hydraulic fluid consuming device has been satisfied, the pump unit continuing operation after the demand for hydraulic fluid by the hydraulic fluid consuming device has been satisfied by replenishing the at least one accumulator, and the pump unit turning off upon the at least one accumulator being replenished. 3. The system according to claim 1, wherein the transient-state start-up operation comprises stroking the hydraulic fluid consuming device from a closed position where the delivery of hydraulic fluid is inhibited to an open position where a substantial amount of hydraulic fluid is provided thereto, and back to the closed position where the delivery of hydraulic fluid to the hydraulic fluid consuming device is inhibited. 4. The system according to claim 3, wherein one of the plurality of diagnostics comprises determining an amount of hydraulic fluid displaced during the stroking of the hydraulic fluid consuming device. 5. The system according to claim 4, wherein the condition of the at least one accumulator includes an operational health of the at least one accumulator that is compared against subsequent measurements of displaced hydraulic fluid obtained from future strokings of the hydraulic fluid consuming device. 6. The system according to claim 3, wherein one of the plurality of diagnostics comprises generating at least one plot of waveforms describing operational effects while performing the stroking of the hydraulic fluid consuming device. 7. The system according to claim 3, wherein one of the plurality of diagnostics comprises determining slew time to perform the stroking of the hydraulic fluid consuming device. 8. The system according to claim 1, wherein the controller is integrated with a portable human interface machine device that operates in proximity to the hydraulic pump unit and the hydraulic fluid consuming device, wherein the portable human interface machine is configured to initiate the transient-state start-up operation and determine the plurality of diagnostics for the hydraulic fluid consuming device and the hydraulic pump unit. 9. The system according to claim 1, wherein the controller is integrated with a remote computing system that facilitates remote monitoring and diagnostics of the hydraulic pump unit and the hydraulic fluid consuming device during the transient-state start-up operation. 10. The system according to claim 1, wherein the volumetric flow rates include a volumetric flow rate of the hydraulic fluid delivered to the hydraulic fluid consuming device by the hydraulic pump unit. 11. A hydraulic system, comprising: a plurality of hydraulic fluid consuming devices;an electric motor;a pump unit driven by the electric motor that provides hydraulic fluid to the plurality of hydraulic fluid consuming devices, the pump unit further including at least one accumulator used to contribute in delivering the hydraulic fluid to the hydraulic fluid consuming devices;a valve that controls supply of the hydraulic fluid by the pump unit and the at least one accumulator to the plurality of hydraulic fluid consuming devices;a wattmeter that measures the electric power consumption by the electric motor as the pump unit and the at least one accumulator provide the hydraulic fluid to the plurality of hydraulic fluid consuming devices during a transient-state start-up operation in which the pump unit and the at least one accumulator turn on to deliver the hydraulic fluid to the plurality of hydraulic fluid consuming devices and thereafter replenish the accumulator for a predetermined amount of time; anda controller that uses the electric power consumption measured by the wattmeter during the transient-state start-up operation to determine fluid flow parameters from the operation of the pump unit and the at the least one accumulator, wherein the fluid flow parameters comprise power delivered to the hydraulic fluid by the hydraulic pump unit and volumetric flow rates, the controller determining the power delivered to the hydraulic fluid by the hydraulic pump unit by reference to power consumption that occurs above a minimum trigger power level, the minimum trigger power level representing a minimum power difference above a floor power level that represents the transient-state start-up operation and which indicates that the hydraulic fluid consuming device is starting to consume hydraulic fluid, the controller determines a plurality of diagnostics for the hydraulic fluid consuming device and the pump unit as a function of the fluid flow parameters, including estimating an internal pressure and hydraulic storage amount of the at least one accumulator using a polytropic gas relationship and the predetermined amount of time, respectively, which estimate the at least one accumulator's condition relative to an initial internal pressure and available hydraulic fluid storage amount of the at least one accumulator. 12. The hydraulic system according to claim 11, wherein the transient-state start-up operation comprises at least one of the plurality of hydraulic fluid consuming devices making a demand for hydraulic fluid, the demand for hydraulic fluid causing a pressure drop, the pump unit and the at least one accumulator responding to the pressure drop by delivering the hydraulic fluid to the hydraulic fluid consuming device, the at least one accumulator delivering the hydraulic fluid until the demand for hydraulic fluid by the hydraulic fluid consuming device has been satisfied, the pump unit continues operation after the demand for hydraulic fluid by the hydraulic fluid consuming device has been satisfied by replenishing the at least one accumulator, and the pump unit turning off upon the at least one accumulator being replenished. 13. The hydraulic system according to claim 12, wherein the transient-state start-up operation comprises stroking the plurality of hydraulic fluid consuming devices from a closed position where the delivery of hydraulic fluid is inhibited to an open position where a substantial amount of hydraulic fluid is provided thereto, and back to the closed position where the delivery of hydraulic fluid to the hydraulic fluid consuming devices is inhibited. 14. The hydraulic system according to claim 13, wherein one of the plurality of diagnostics comprises determining an amount of hydraulic fluid displaced during the stroking of the plurality of hydraulic fluid consuming devices. 15. The hydraulic system according to claim 14, wherein the condition of the at least one accumulator includes an operational health of the at least one accumulator that is compared against subsequent measurements of displaced hydraulic fluid obtained from future stroking of the plurality of hydraulic fluid consuming devices. 16. The hydraulic system according to claim 13, wherein one of the plurality of diagnostics comprises generating at least one plot of waveforms describing operational effects while performing the stroking of the plurality of hydraulic fluid consuming devices. 17. The hydraulic system according to claim 13, wherein one of the plurality of diagnostics comprises determining slew time to perform the stroking of the plurality of hydraulic fluid consuming devices. 18. The hydraulic system according to claim 13, wherein the stroking of the plurality of hydraulic fluid consuming devices comprises stroking each of the hydraulic fluid consuming devices individually, stroking a pair of the hydraulic fluid consuming devices after individual device stroking, stroking a trio of the hydraulic fluid consuming devices after stroking the pair of devices, and progressively increasing the amount hydraulic fluid consuming devices that are stroked until all of the devices have stroked together. 19. The hydraulic system according to claim 18, wherein the plurality of diagnostics are generated after each stroking set. 20. The hydraulic system according to claim 19, wherein one of the plurality of diagnostics comprises an amount of energy used by the at least one accumulator during each stroking set. 21. The hydraulic system according to claim 19, wherein one of the plurality of diagnostics comprises determining an amount of hydraulic fluid displaced during each stroking set. 22. The hydraulic system according to claim 19, wherein one of the plurality of diagnostics comprises generating at least one plot of waveforms describing operational effects while performing each stroking set. 23. The hydraulic system according to claim 19, wherein one of the plurality of diagnostics comprises determining slew time to perform the stroking of the plurality of hydraulic fluid consuming devices in each stroking set. 24. The hydraulic system according to claim 18, wherein the plurality of diagnostics includes an operational health of the plurality of hydraulic fluid consuming devices, the electric motor and the pump unit.
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이 특허에 인용된 특허 (7)
Nozari Farhad, Aircraft hydraulic pump control system.
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