Advanced Flight Display For General Aviation Aircraft: A Cost-Effective Means to Enhance Safety J. Dubinsky, M. Braasch, M. Uijt de Haag Ohio University.

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Presentation transcript:

Advanced Flight Display For General Aviation Aircraft: A Cost-Effective Means to Enhance Safety J. Dubinsky, M. Braasch, M. Uijt de Haag Ohio University Avionics Engineering Center

2 Typical Instrumentation

3 Ref:

4 Introduction Comment »The ‘instruments’ in use today for GA have undergone virtually negligible changes in fifty- plus years Objective »To design an advanced flight display for the general aviation pilot to increase SA in IMC flight, thus increasing safety »To provide an initial assessment of the display concept for GA (Is this approach valid?)

5 Introduction (cont’d) Concerns »Cost versus Capability »Simple enough that it can be flown by the average low-time GA IFR pilot Design »Velocity vector based positioning and orientation »DELPHINS display software

6 Motivation Provide Visual Cues in IMC Reduce pilot training and recurrency requirements for flight in IMC Produce ‘virtual VMC’ in the cockpit Keep the pilot looking out-the-window at the same time he/she is flying the instrument approach

7 Overview of the eHUD An enhanced head-up type of display Flat panel display mounted on top of the dashboard of the plane The flat panel projects a mirror image of the flight display onto the windshield The resulting image on the windshield allows for simultaneous viewing of the display and the out-the-window environment

8 Design Issues Accuracy »Must accurately depict the external environment and aircraft state Affordability »Develop using existing technologies äGPS äDELPHINS Simplistic »Training requirements must be minimal

9 Velocity Vector Based Orientation Developed by Dr. Kornfeld, Dr. Hansman and Dr. Deyst at MIT »Also known as single-antenna GPS-based attitude determination Pseudo Roll, Flight Path Angle & Ground Track Angle »Referenced about the velocity vector with respect to local horizon »Pseudo Roll based on acceleration derived from GPS velocity

10 10 DELPHINS ‘Tunnel-in-the-sky’ display technology Pioneered by Erik Theunissen at the Delft University of Technology, The Netherlands Three-dimensional representation of the outside world allows for more intuitive control of the aircraft

11 11 Flight Test Setup NovAtel Rx Real-Time Processor Display Processor Display GPS Antenna

12 12 Flight Test Setup Piper Saratoga (PA-32) »Single engine »Six Seats CyberResearch Inc Industrial Computer »Windows operating system »3Dfx graphics card »Ethernet card

13 13 Flight Test Setup Gateway 600 MHz Laptop »QNX »PCMCIA card 2 Monitors »Software Initialization and Monitoring »Display Presentation NovAtel GPS Receiver Power Supply for active GPS Antenna

14 14 Flight Test Setup Piper Saratoga PA-32

15 15 Flight Test Setup

16 16 Flight Test Setup The eHUD

17 17 Flight Test Results Verified MIT’s conclusion that single- antenna GPS can provide accurate attitude measurements to drive an approach flight display The eHUD is a feasible way to allow the pilot to follow the display and simultaneously look for the runway

18 18 Future Work Install NovAtel OEM4 with 20 Hz position and velocity Investigate Projection methods »Minimize installation time, effort and cost »Consider use of a hinged-window Human Factors »Optimal terrain depiction, use of symbols »Workload Assessment; Situational Awareness »Depth Perception; Image Scaling