Flight control system with low-frequency instrument landing system localizer anomaly detection and method of use
First Claim
1. A flight control module for detecting anomalies in instrument landing system (ILS) localizer signals during landing of an aircraft, comprising:
- a communication interface configured to receive inertial data for said aircraft, global positioning system (GPS) data for said aircraft, and an ILS localizer deviation; and
a processor coupled to said communication interface and configured to;
compute an inertial localizer deviation based on the inertial data,compute a GPS localizer deviation based on the GPS data,compare the ILS localizer deviation to an average of the inertial localizer deviation and the GPS localizer deviation to detect a low-frequency anomaly in the ILS localizer deviation, andinitiate a transition from controlling said aircraft based on the ILS localizer deviation to controlling said aircraft based on the inertial localizer deviation when the low-frequency anomaly is detected.
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Accused Products
Abstract
A flight control module for detecting anomalies in ILS localizer signals during landing of an aircraft is provided. The flight control module includes a communication interface and a processor coupled thereto. The communication interface is configured to receive inertial data, GPS data, and an ILS localizer deviation for the aircraft. The processor is configured to compute an inertial localizer deviation based on the inertial data and a GPS localizer deviation based on the GPS data. The processor is configured to compare the ILS localizer deviation to an average of the inertial localizer deviation and the GPS localizer deviation to detect a low-frequency anomaly in the ILS localizer deviation. The processor is configured to initiate a transition from controlling the aircraft based on the ILS localizer deviation to controlling the aircraft based on the inertial localizer deviation when the low-frequency anomaly is detected.
37 Citations
24 Claims
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1. A flight control module for detecting anomalies in instrument landing system (ILS) localizer signals during landing of an aircraft, comprising:
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a communication interface configured to receive inertial data for said aircraft, global positioning system (GPS) data for said aircraft, and an ILS localizer deviation; and a processor coupled to said communication interface and configured to; compute an inertial localizer deviation based on the inertial data, compute a GPS localizer deviation based on the GPS data, compare the ILS localizer deviation to an average of the inertial localizer deviation and the GPS localizer deviation to detect a low-frequency anomaly in the ILS localizer deviation, and initiate a transition from controlling said aircraft based on the ILS localizer deviation to controlling said aircraft based on the inertial localizer deviation when the low-frequency anomaly is detected. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A flight control system for landing an aircraft, said flight control system comprising:
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a communication bus; a global positioning system (GPS) coupled to said communication bus and configured to transmit a GPS position of said aircraft onto said communication bus; a multi-mode receiver (MMR) coupled to said communication bus and configured to transmit an instrument landing system (ILS) localizer deviation onto said communication bus, the ILS localizer deviation generated according to received ILS localizer signals; a flight control module comprising a processor coupled to said communication bus and configured to; receive inertial data for said aircraft, the GPS position, and the ILS localizer deviation on said communication bus, compute a GPS localizer deviation and an inertial localizer deviation, and detect a low-frequency anomaly in the received ILS localizer signals based on variances in the ILS localizer deviation relative to an average localizer deviation computed for the GPS localizer deviation and the inertial localizer deviation; and an automated landing system configured to transition from controlling said aircraft based on the ILS localizer deviation to controlling said aircraft based on the inertial localizer deviation when the low-frequency anomaly is detected. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of detecting a low-frequency anomaly in an instrument landing system (ILS) localizer signal received by an aircraft during landing, said method comprising:
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receiving, at a multi-mode receiver (MMR), an instrument landing system (ILS) localizer signal; computing, by the MMR, a ILS localizer deviation based on the ILS localizer signal; controlling, by an automated landing system, the aircraft according to the ILS localizer deviation; computing, by a flight control module, a global position system (GPS) localizer deviation; computing, by the flight control module, an inertial localizer deviation; computing, by the flight control module, an average localizer deviation of the GPS localizer deviation and the inertial localizer deviation; detecting, by the flight control module, the low-frequency anomaly when a difference between the average localizer deviation and the ILS localizer deviation exceeds a threshold; and controlling, by the automated landing system, the aircraft according to the inertial localizer deviation after detecting the low-frequency anomaly. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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Specification