System and method for defining normal operating regions and identifying anomalous behavior of units within a fleet, operating in a complex, dynamic environment
First Claim
1. A method to monitor dynamic units that operate in dynamic environments comprising:
- collecting raw data to capture state information of the units;
using a processor to analyze the raw data by obtaining a set of normalized compression distance (NCD) of the raw data based on a Kolmogorov complexity to identify an anomaly in a unitvisualizing the set of NCD in a two dimensional space;
minimizing distortion of the visualization by using a Kruskal'"'"'s Stress-1 projection;
wherein the raw data is obtained by tracking an aircraft flight, the method further comprising tracking additional aircraft flights, computing a set of NCD for each additional flight, projecting the set of NCD in a two dimensional space for viewing, and classifying flights that are potential anomalies.
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Abstract
Monitoring dynamic units that operate in complex, dynamic environments, is provided in order to classify and track unit behavior over time. When domain knowledge is available, feature-based models may be used to capture the essential state information of the units. When domain knowledge is not available, raw data is relied upon to perform this task. By analyzing logs of event messages (without having access to their data dictionary), embodiments allow the identification of anomalies (novelties). Specifically, a Normalized Compression Distance (such as one based on Kolmogorov Complexity) may be applied to logs of event messages. By analyzing the similarity and differences of the event message logs, units are identified that did not experience any abnormality (and locate regions of normal operations) and units that departed from such regions.
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Citations
16 Claims
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1. A method to monitor dynamic units that operate in dynamic environments comprising:
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collecting raw data to capture state information of the units; using a processor to analyze the raw data by obtaining a set of normalized compression distance (NCD) of the raw data based on a Kolmogorov complexity to identify an anomaly in a unit visualizing the set of NCD in a two dimensional space; minimizing distortion of the visualization by using a Kruskal'"'"'s Stress-1 projection; wherein the raw data is obtained by tracking an aircraft flight, the method further comprising tracking additional aircraft flights, computing a set of NCD for each additional flight, projecting the set of NCD in a two dimensional space for viewing, and classifying flights that are potential anomalies. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method to monitor dynamic units that operate in dynamic environments comprising:
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defining a virtual string of data for a normal operation of the units in which no anomalies occur; collecting raw data to capture state information of the units; using a processor to analyze the raw data by obtaining a set of normalized compression distance (NCD) of the raw data versus the virtual string of data for a normal operation and based on a Kolmogorov complexity to identify anomaly in a unit; and visualizing the set of NCD in a two dimensional space; wherein the raw data is obtained by tracking an aircraft flight, the method further comprising tracking additional aircraft flights, computing a set of NCD for each additional flight, projecting the set of NCD in a two dimensional space for viewing, and classifying flights that are potential anomalies. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification