Method and apparatus for detecting performance of an APU fuel assembly
First Claim
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1. A method for detecting performance of an Airborne Auxiliary Power Unit (APU) fuel assembly of an aircraft, comprising:
- obtaining APU messages at multiple time points within a time period;
obtaining running parameters of the APU fuel assembly according to the APU messages, the running parameters at least comprising starting times STAs within said time period;
calculating average value AVG and deviation index δ
of the starting times STAs within said time period; and
determining whether performance of the APU fuel assembly is in a stable phase, a decline phase or a failure phase according to the deviation index δ
, the determining comprising;
in response to that the deviation index δ
is greater than a decline threshold value, determining that performance of the APU fuel assembly is in the stable phase;
in response to that the deviation index δ
is greater than the decline threshold value and is less than a failure threshold value, determining that performance of the APU fuel assembly is in the decline phase; and
in response to that the deviation index δ
is greater than the failure threshold value, determining that performance of the APU fuel assembly is in the failure phase; and
determining a stable deviation index δ
when the APU fuel assembly is in the stable phase;
wherein, the decline threshold value is about 2 times of the stable deviation index in the stable phase, and the failure threshold value is about 3-4 times of the stable deviation index.
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Abstract
The present invention relates to a method for detecting performance of an APU fuel assembly, comprising: obtaining APU messages at multiple time points within a time period; obtaining running parameters of the APU fuel assembly according to the APU messages, the running parameters at least comprising starting time STA; calculating average value AVG and deviation index δ of the starting time STA within said time period; determining whether performance of the APU fuel assembly is in the stable phase, decline phase, or failure phase according to the deviation index δ.
15 Citations
12 Claims
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1. A method for detecting performance of an Airborne Auxiliary Power Unit (APU) fuel assembly of an aircraft, comprising:
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obtaining APU messages at multiple time points within a time period; obtaining running parameters of the APU fuel assembly according to the APU messages, the running parameters at least comprising starting times STAs within said time period; calculating average value AVG and deviation index δ
of the starting times STAs within said time period; anddetermining whether performance of the APU fuel assembly is in a stable phase, a decline phase or a failure phase according to the deviation index δ
, the determining comprising;in response to that the deviation index δ
is greater than a decline threshold value, determining that performance of the APU fuel assembly is in the stable phase;in response to that the deviation index δ
is greater than the decline threshold value and is less than a failure threshold value, determining that performance of the APU fuel assembly is in the decline phase; andin response to that the deviation index δ
is greater than the failure threshold value, determining that performance of the APU fuel assembly is in the failure phase; anddetermining a stable deviation index δ
when the APU fuel assembly is in the stable phase;wherein, the decline threshold value is about 2 times of the stable deviation index in the stable phase, and the failure threshold value is about 3-4 times of the stable deviation index. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus for detecting performance of an APU fuel assembly of an aircraft comprises a processor and a storage for storing computer readable instructions for instructing the processor implementing the following units:
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a message acquisition unit configured to obtain APU messages at multiple time points in a time period; a message parsing unit configured to parse out running parameters of the APU fuel assembly according to the APU messages, the running parameters at least comprising starting times within the time period; and a performance detection unit configured to determine whether performance of the APU fuel assembly is in a stable phase, a decline phase, or a failure phase according to a calculated average value and a calculated deviation index δ
of the starting times of the APU within the time period by;in response to that the deviation index δ
is greater than a decline threshold value, determining that performance of the APU fuel assembly is in the stable phase;in response to that the deviation index δ
is greater than the decline threshold value and is less than a failure threshold value, determining that performance of the APU fuel assembly is in the decline phase; andin response to that the deviation index δ
is greater than the failure threshold value, determining that performance of the APU fuel assembly is in the failure phase; anddetermining a stable deviation index when the APU fuel assembly is in the stable phase; wherein, the decline threshold value is about 2 times of the stable deviation index in the stable phase, and the failure threshold value is about 3-4 times of the stable deviation index.
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12. An apparatus for detecting performance of an APU fuel assembly of an aircraft comprises:
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a processor; and a storage coupled to the processor, which stores computer readable instructions; the computer readable instructions run on the processor to execute the following steps; obtaining APU messages at multiple time points within a time period; parsing out running parameters of the APU fuel assembly according to the messages, the running parameters comprising starting times of the APU within the time period; and determining whether performance of the APU fuel assembly is in a stable phase, a decline phase, or a failure phase according to a calculated average value and a calculated deviation index δ
of the starting times within the time period, the determining comprising;in response to that the calculated deviation index δ
is greater than a decline threshold value, determining that performance of the APU fuel assembly is in the stable phase;in response to that the calculated deviation index δ
is greater than the decline threshold value and is less than a failure threshold value, determining that performance of the APU fuel assembly is in the decline phase; andin response to that the calculated deviation index δ
is greater than the failure threshold value, determining that performance of the APU fuel assembly is in the failure phase; anddetermining a stable deviation index when the APU fuel assembly is in the stable phase; wherein, the decline threshold value is about 2 times of the stable deviation index in the stable phase, and the failure threshold value is about 3-4 times of the stable deviation index.
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Specification