[특허]Cockpit display systems and methods for performing glide slope validation processes during instrument landing system approaches

HONEYWELL INTERNATIONAL INC.

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Cockpit display systems and methods for performing glide slope validation processes during instrument landing system approaches

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01C-023/00 B64D-043/00 B64D-045/08 G09G-005/36
출원번호	US-0439469 (2017-02-22)
등록번호	US-10094682 (2018-10-09)
발명자 / 주소	He, Gang
출원인 / 주소	HONEYWELL INTERNATIONAL INC.
대리인 / 주소	Lorenz & Kopf, LLP
인용정보	피인용 횟수 : 0 인용 특허 : 12

초록
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Cockpit display systems and methods are provided for performing Glide Slope (G/S) validation processes during Instrument Landing System (ILS) approaches. In one embodiment, the cockpit display system utilizes validated G/S signals to selectively correct the viewpoint of a Synthetic Vision System (SVS) scene generated on a Synthetic Vision Primary Flight Display (SV-FPD). In such an embodiment, the cockpit display system may include an ILS receiver, a cockpit display device on which the SV-PFD is generated, and a controller operably coupled to the cockpit display device and to the ILS receiver. During an ILS approach, the controller selectively performs a G/S validation algorithm to determine the validity of the G/S signals received during the ILS approach. If determining that the G/S signals are valid, the controller then repeatedly updates the SVS viewpoint during the ILS approach based, at least in part, on the validated G/S signals.

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1. A cockpit display system onboard an aircraft, the cockpit display system comprising: an Instrument Landing System (ILS) receiver configured to detect Glide Slope (G/S) signals during an ILS approach flown by the aircraft and terminating at a destination runway;a cockpit display device on which a Synthetic Vision Primary Flight Display (SV-PFD) is generated, the SV-PFD including a Synthetic Vision System (SVS) scene presented from an SVS viewpoint; anda controller operably coupled to the cockpit display device and to the ILS receiver, the controller configured to: selectively perform a G/S validation algorithm to determine the validity of the G/S signals received during the ILS approach; andif determining that the G/S signals are valid, repeatedly update a vertical component of the SVS viewpoint during the ILS approach based upon the G/S signals. 2. The cockpit display system of claim 1 wherein the controller is configured to repeatedly update the vertical component of the SVS viewpoint by repeatedly calculating a current Height Above Threshold (HAT) of the aircraft relative to the destination runway as a function of: (i) a current ground distance from the aircraft to the destination runway, and (ii) an angle of a G/S beam defined by the G/S signals. 3. The cockpit display system of claim 2 wherein the controller is further configured to: estimate a vertical deviation of the aircraft from the G/S beam during the ILS approach; andconsider the estimated vertical deviation in calculating the current HAT of the aircraft relative to the destination runway. 4. The cockpit display system of claim 3 wherein the controller is further configured to generate G/S vertical deviation symbology on the SV-PFD indicative of the estimated vertical deviation of the aircraft from the G/S beam during the ILS approach. 5. The cockpit display system of claim 1 further comprising an altitude data source configured to provide altitude data to the controller; wherein the controller is coupled to the altitude data source and further configured to switch between updating the vertical component of the SVS viewpoint utilizing the G/S signals and utilizing the altitude data during the ILS approach based, at least in part, on an altitude of the aircraft. 6. The cockpit display system of claim 5 wherein the controller is configured to: utilize the G/S signals to update the vertical component of the SVS viewpoint when the current Height Above Threshold (HAT) of the aircraft relative to the destination runway is within a predetermined HAT range; andutilize the altitude data to update the vertical component of the SVS viewpoint when the HAT of the aircraft is outside of the predetermined HAT range. 7. The cockpit display system of claim 1 wherein the controller is further configured to generate a visual alert on the SV-FPD if determining that the G/S signals are invalid. 8. The cockpit display system of claim 1 wherein the controller, when performing the G/S validation algorithm, is configured to: establish a representative Flight Path Angle (FPA) value based, at least in part, on flight data aggregated during performance of the ILS approach by the aircraft; anddetermine whether the G/S signals are valid based, at least in part, on a comparison between the representative FPA value and an expected G/S beam angle corresponding to the destination runway. 9. The cockpit display system of claim 8 further comprising an onboard database storing a plurality of expected G/S beam angles corresponding to a plurality of runways; wherein the controller is coupled to the onboard database and configured to recall the expected G/S beam angle corresponding to the destination runway from the onboard database. 10. The cockpit display system of claim 8 further comprising an FPA data source configured to provide FPA measurements; wherein the controller is coupled to the IRS and configured to establish a representative FPA value by averaging multiple FPA measurements provided by the FPA data source during the ILS approach. 11. The cockpit display system of claim 10 wherein the controller is further configured to eliminate from consideration in averaging the multiple FPA measurements those FPA measurements failing to satisfy one or more predetermined data constraints. 12. The cockpit display system of claim 11 wherein the one or more predetermined data constraints comprise a maximum acceptable angular deviation from an expected FPA value. 13. The cockpit display system of claim 11 wherein the one or more predetermined data constraints comprise a maximum acceptable vertical deviation from an expected vertical position of the aircraft. 14. The cockpit display system of claim 11 wherein the one or more predetermined data constraints comprise a maximum acceptable speed deviation from an expected vertical speed of the aircraft. 15. The cockpit display system of claim 1 wherein the controller is configured to selectively perform the G/S validation algorithm based, at least in part, on a categorization of the ILS approach. 16. The cockpit display system of claim 1 further comprising a Global Positioning System (GPS) receiver configured to provide GPS altitude data and coupled to the controller; wherein the controller, if determining that the G/S signals are valid, is further configured to: calculate a current Height Above Threshold (HAT) of the aircraft based, at least in part, on an angle of a G/S beam defined by the G/S signals; andgenerate a visual alert on the SV-FPD if a disparity between the current HAT and the GPS altitude data exceeds a threshold value. 17. A cockpit display system onboard an aircraft, the cockpit display system comprising: an Instrument Landing System (ILS) receiver configured to receive Glide Slope (G/S) signals as the aircraft flies an ILS approach terminating at a destination runway;a cockpit display device on which a Synthetic Vision Primary Flight Display (SV-PFD) is generated; anda controller operably coupled to the cockpit display device and to the ILS receiver, the controller configured to: selectively perform a G/S validation algorithm to determine the validity of the G/S signals received during the ILS approach; andgenerate a visual alert on the SV-PFD if determining that the G/S signals are invalid. 18. The cockpit display system of claim 17 further comprising an Inertial Reference System (IRS) coupled to the controller; wherein the controller is further configured to: establish a representative Flight Path Angle (FPA) value as a function of FPA measurements provided by the IRS during the ILS approach; anddetermine the validity of the G/S signals based upon any disparity between the representative FPA value and an expected G/S beam angle corresponding to the destination runway. 19. A method carried-out by a cockpit display system including a cockpit display device, an Instrument Landing System (ILS) receiver, and a controller operably coupled to the cockpit display device and to the ILS receiver, the method comprising: generating a Synthetic Vision Primary Flight Display (SV-PFD) on the cockpit display including a Synthetic Vision System (SVS) scene presented from an SVS viewpoint;at the controller, selectively performing a Glide Slope (G/S) validation algorithm to determine whether G/S signals detected by the ILS receiver during an ILS approach are valid; andif determining the G/S signals to be valid, repeatedly refreshing the SV-PFD during the ILS approach to visually adjust a vertical component of the SVS viewpoint in accordance with the G/S signals. 20. The method of claim 19 further comprising generating a visual alert on the SV-PFD if the determining the G/S signals to be invalid.

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Cockpit display systems and methods for performing glide slope validation processes during instrument landing system approaches

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Cockpit display systems and methods for performing glide slope validation processes during instrument landing system approaches

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