Helmet-Mounted Display Design Guide

Abstract : Helmet mounted displays (HMDs) present flight, navigation, and weapon information in the pilot's line of sight. The HMD was developed to allow the pilot to retain aircraft and weapon information while looking off boresight. This document reviews current state of the art in HMDs and presents a design guide for the HMD engineer in identifying several critical HMD issues: symbol stabilization, inadequate definitions, undefined symbol drive laws, helmet considerations, and field of view (FOV) vs. resolution tradeoff requirements. In particular, display latency is a key issue for HMDs. In addition to requiring further experimental studies, it impacts the definition and control law issues. Symbol stabilization is also critical. In the case of the Apache helicopter, the lack of compensation for pilot head motion creates excessive workload during hovering and nap of the earth (NOE) flight. This translates into excessive training requirements. There is no agreed upon set of definitions or descriptions for how HMD symbols are driven to compensate for pilot head motion. A set of definitions is proposed to address this. There are several specific areas where simulation and flight experiments are needed: development of hover and NOE symbologies which compensate for pilot head movement; display latency and sampling, and the tradeoff between FOV, sensor resolution and symbology.

[1]  Patricia A. May,et al.  The Role of Visual Attention in Head-Up Displays: Design Implications for Varying Symbology Intensity , 1995 .

[2]  Jeffery A. Schroeder,et al.  Improvements in hover display dynamics for a combat helicopter , 1993 .

[3]  Lawrence A. Klein,et al.  Sensor and Data Fusion Concepts and Applications , 1993 .

[4]  Thomas J. Sharkey.  Demonstration of obstacle avoidance system (OASYS) symbology in full mission simulation , 1994, Defense, Security, and Sensing.

[5]  Dean F. Kocian.  Design Considerations for Virtual Panoramic Display (VPD) Helmet Systems , 1990 .

[6]  Loran A. Haworth,et al.  Helmet Mounted Display symbology integration research , 1992 .

[7]  Jeff A. Ross,et al.  Hybrid Video Amplifier Chip Set for Helmet-Mounted Visually Coupled Systems. , 1994 .

[8]  David W. King.  Handling qualities effects of display latency , 1993 .

[9]  Jerry Murray.  Content and media analysis for intelligent helmet-mounted displays , 1997, Defense, Security, and Sensing.

[10]  Michael Venturino,et al.  Performance and head movements using a helmet-mounted display with different sized fields-of-view , 1990 .

[11]  Bernard D. Adelstein,et al.  Effect of Head-Slaved Visual Image Roll on Spatial Situation Awareness , 1993 .

[12]  Loran A. Haworth,et al.  Advanced helicopter cockpit and control configurations for helicopter combat missions , 1987 .

[13]  Preston S. Hall,et al.  Helmet-mounted systems technology planning for the future , 1992, Defense, Security, and Sensing.

[14]  J Norman,et al.  Visual Accommodation and Virtual Image Displays: Target Detection and Recognition , 1986, Human factors.

[15]  Lorren Stiles.  Sikorsky Aircraft Crew Station Technology Research Helicopter , 1985 .

[16]  Valerie J. Gawron,et al.  A Preliminary Flight Evaluation of the Peripheral Vision Display Using the Nt-33A Aircraft , 1984 .

[17]  P. T. Bapu,et al.  Quick-disconnect harness system for helmet-mounted displays , 1992, Defense, Security, and Sensing.

[18]  W R Uttal,et al.  Psychophysical Foundations of a Model of Amplified Night Vision in Target Detection Tasks , 1994, Human factors.

[19]  Stephen E. Morse,et al.  Oculomotor Responses with Aviator Helmet-Mounted Displays and Their Relation to In-Flight Symptoms , 1995, Hum. Factors.

[20]  J B Sheehy,et al.  Depth perception after prolonged usage of night vision goggles. , 1989, Aviation, space, and environmental medicine.

[21]  Eric E. Geiselman,et al.  Utility of off-boresight helmet-mounted symbology during a high-angle airborne target acquisition task , 1994, Defense, Security, and Sensing.

[22]  Kathleen M. Robinette.  Fit Testing as a Helmet Development Tool , 1993 .

[23]  James H. Brindle.  Advanced helmet tracking technology developments for naval aviation , 1996, Defense + Commercial Sensing.

[24]  Sally A. Viken,et al.  Predictive nosepointing and flightpath displays for air-to-air combat , 1992, Defense, Security, and Sensing.

[25]  S N Roscoe,et al.  Improving Visual Performance through Volitional Focus Control , 1987, Human factors.

[26]  Christopher D. Wickens,et al.  Object versus space-based models of visual attention: Implications for the design of head-up displays , 1995 .

[27]  John P. Sauerborn.  Advances in miniature projection CRTs for helmet displays , 1992, Defense, Security, and Sensing.

[28]  Michael J. Griffin,et al.  A Review and Investigation of Aiming and Tracking Performance with Head-Mounted Sights , 1987, IEEE Transactions on Systems, Man, and Cybernetics.

[29]  Helen J. Dudfield,et al.  Methodological issues in the design and evaluation of HMD symbology , 1995, Defense, Security, and Sensing.

[30]  Eric E. Geiselman,et al.  A Comparison of Three Attitude Display Symbology Structures during an Attitude Maintenance Task , 1992 .

[31]  C P Gibson.  Binocular Disparity and Head-Up Displays , 1980, Human factors.

[32]  David L. Green.  ASSESSMENT OF NIGHT VISION GOGGLE WORKLOAD: FLIGHT TEST ENGINEER'S GUIDE , 1994 .

[33]  George A. Sexton.  Cockpit–Crew Systems Design and Integration , 1988 .

[34]  Henry Fuchs,et al.  Comparison of optical and video see-through, head-mounted displays , 1995, Other Conferences.

[35]  Charles E. Billings,et al.  Human-centered aircraft automation: A concept and guidelines , 1991 .

[36]  Arie Avnur,et al.  A Lightweight Innovative Helmet Airborne Display And Sight (HADAS) , 1987, Other Conferences.

[37]  Jennifer J. Whitestone.  Design and Evaluation of Helmet Systems Using 3D Data , 1993 .

[38]  John W. Garrett,et al.  A collation of anthropometry , 1971 .

[39]  David A. Southard,et al.  Head-mounted displays for virtual reality , 1994, Defense, Security, and Sensing.

[40]  S N Roscoe,et al.  An Integrated Display for Vertical and Translational Flight: Eight Factors Affecting Pilot Performance , 1986, Human factors.

[41]  Robert F. Stengel,et al.  Flight tests of a microprocessor control system , 1979 .

[42]  George E. Cooper,et al.  The use of pilot rating in the evaluation of aircraft handling qualities , 1969 .

[43]  Matthew S. Middendorf,et al.  The Effects of Simulator Time Delays on A Sidestep Landing Maneuver: A Preliminary Investigation , 1990 .

[44]  Is Increased Accommodation a Necessary Condition for Instrument Myopia , 1994 .

[45]  Daniel Gopher,et al.  Expanding the Envelope of Performance: Training Pilots to Use Helmet Mounted Displays , 1994 .

[46]  Richard L. Newman,et al.  Head-Up Displays: Designing the Way Ahead , 1995 .

[47]  K. Nakayama,et al.  Real world occlusion constraints and binocular rivalry , 1990, Vision Research.

[48]  Robert K. Osgood,et al.  JSF integrated helmet audio-visual system technology demonstration results , 1997, Defense, Security, and Sensing.

[49]  Richard B. Huntoon,et al.  Outside scene obscuration by a millimeter-wave radar image presented on a HUD , 1995, Defense, Security, and Sensing.

[50]  Jerry Silverman,et al.  Display and Enhancement of Infrared Images , 1992 .

[51]  Roger Leinenwever,et al.  Low-cost monochrome CRT helmet display , 1992, Defense, Security, and Sensing.

[52]  Eric E. Geiselman,et al.  Head versus aircraft oriented air-to-air target location symbology using a helmet-mounted display , 1995, Defense, Security, and Sensing.

[53]  Eric W. Larkin,et al.  An Integrated Approach To Helmet Display System Design , 1987, Other Conferences.

[54]  R. L. Newman,et al.  Flight testing a general aviation head-up display , 1996 .

[55]  John D. Funk,et al.  Primary display latency criteria based on flying qualities and performance data , 1993 .

[56]  Ints Kaleps,et al.  Measurement of Mass and Cg Location of Helmet Systems , 1993 .

[57]  Shawn Corwyn Coyle.  The Art and Science of Flying Helicopters , 1995 .

[58]  B. Welch,et al.  The Fiber-Optic Helmet-Mounted Display, , 1984 .

[59]  M. Ali Montazer,et al.  The Effect of Roll-Stabilized Sensor Information on Pilot Performance , 1991 .

[60]  A Arditi,et al.  Binocular enhancement of visual acuity. , 1993, Journal of the Optical Society of America. A, Optics, image science, and vision.

[61]  Michael Venturino,et al.  Using Target Replacement Performance to Measure Spatial Awareness in a Helmet-Mounted Simulator , 1988 .

[62]  Richard A. Coppenbarger,et al.  Results from the NASA Automated Nap-of-the-Earth Program , 1997 .

[63]  L. Kaufman,et al.  Handbook of perception and human performance , 1986 .

[64]  Shawn T. Donley,et al.  Helmet Mounted Display Symbology for Helicopter Landing on Small Ships , 1981 .

[65]  James F. Barnette.  Role of Head-Up Display in Instrument Flight , 1976 .

[66]  Carita A. DeVilbiss,et al.  Effect of arc segmented attitude reference symbology on a helmet-mounted display during an unusual attitude recovery task , 1995, Defense, Security, and Sensing.

[67]  Roger Leinenwever,et al.  Low-cost color LCD helmet display , 1992, Defense, Security, and Sensing.

[68]  Ltc C. Thomas Bennett.  Head-Mounted Displays and the Measurement of Performance in a Virtual World , 1989 .

[70]  Michael Venturino,et al.  The Effect of Increasing Task Complexity on the Field-of-View Requirements for a Visually Coupled System , 1989 .

[71]  Clarence E. Rash,et al.  Physical Evaluation of the Integrated Helmet and Display Sighting System (IHADSS) Helmet Display Unit (HDU). , 1995 .

[72]  Nathaniel Bowditch,et al.  American Practical Navigator: An Epitome of Navigation , 1958 .

[73]  Ocular Dominance and Field of View in Monocular and Binocular Optical Systems , 1980, Human factors.

[74]  Michael W. Haas,et al.  Applying Virtual Environment Technology to the Design of Fighter Aircraft Cockpits: Pilot Performance and Situation Awareness in a Simulated Air Combat Task , 1994 .

[75]  Sandra G. Hart,et al.  Helmet-mounted pilot night vision systems: Human factors issues , 1989 .

[76]  G. K. Miller,et al.  Evaluation of several secondary tasks in the determination of permissible time delays in simulator visual and motion cues , 1978 .

[77]  John E. Stewart.  Two Alternative Velocity Vector Cues for the AH-64D: A Comparative Evaluation , 1996 .

[78]  Dean F. Kocian.  Visually Coupled Systems (VCS): Preparing the Engineering Research Framework , 1990 .

[79]  George Carter Bull.  Helmet-mounted display with multiple image sources , 1992, Defense, Security, and Sensing.

[80]  Herschel C. Self,et al.  Optical Tolerances for Alignment and Image Differences for Binocular Helmet-Mounted Displays , 1986 .

[81]  Edward Seckel,et al.  Stability and Control of Airplanes and Helicopters , 1964 .

[82]  Loran A. Haworth,et al.  Test Techniques for Evaluating Flight Displays , 1993 .

[83]  Alexander A. Cameron.  24-hour helmet-mounted display , 1993, Other Conferences.

[84]  Richard L. Newman,et al.  Integrating head-mounted displays into a cockpit , 1997, Defense, Security, and Sensing.

[85]  Terence S. Abbott.  Task-oriented display design - Concept and example , 1989 .

[86]  Ruth Kimchi,et al.  Flying with Dichoptic Displays: The Interplay between Display Characteristics and Attention Control , 1992 .

[87]  Bill McLean,et al.  Developing A Wide Field Of View Hmd For Simulators , 1987, Other Conferences.

[88]  Kirk Moffitt.  Ocular Responses To Monocular And Binocular Helmet-Mounted Display Configurations , 1989, Defense, Security, and Sensing.

[89]  H. Schreyer,et al.  Helicopter Integrated Helmet Requirements and Test Results , 1991 .

[90]  James E. Melzer,et al.  Partial Binocular-Overlap In Helmet-Mounted Displays , 1989, Defense, Security, and Sensing.

[91]  Christopher J. Arbak.  Utility Evaluation Of A Helmet-Mounted Display And Sight , 1989, Defense, Security, and Sensing.

[92]  Loran A. Haworth,et al.  Helmet Mounted Display Systems for Helicopter Simulation , 1989 .

[93]  Louis E. Freund,et al.  Linear Programming Applied to Optimization of Instrument Panel and Workplace Layout , 1967, Human factors.

[94]  B. Sridhar,et al.  Computer vision techniques for rotorcraft low-altitude flight , 1988, IEEE Control Systems Magazine.

[95]  R M Nicholson,et al.  The Feasibility of a Helmet-Mounted Sight as a Control Device , 1966, Human factors.

[96]  Scott A. Nelson,et al.  Quantitative helmet-mounted display system image quality model , 1992, Defense, Security, and Sensing.

[97]  David Troxel,et al.  Update of the AN/AVS-7 Head-Up Display program , 1996, Defense + Commercial Sensing.

[98]  Geoffrey J. N. Clarkson,et al.  Advent of helmet-mounted devices in the combat aircraft cockpit: an operator's viewpoint , 1992, Defense, Security, and Sensing.

[99]  Eli Peli,et al.  Visual Issues In The Use Of A Head-Mounted Monocular Display , 1989, Other Conferences.

[100]  Victor H. L. Cheng,et al.  Technologies for automating rotorcraft nap-of-the-earth flight , 1993 .

[101]  D. F. Crane.  Time delays in flight simulator visual displays , 1980 .

[102]  H. W. Upton,et al.  Head-Mounted Display/Control System in V/STOL Operations , 1971 .

[103]  J. Mandelbaum,et al.  An accommodation phenomenon. , 1960, Archives of ophthalmology.

[104]  Richard L. Newman.  Helmet-Mounted Display Symbology and Stabilization Concepts , 1995 .

[105]  Charles D. Goodyear,et al.  The evaluation of partial binocular overlap on car maneuverability: A pilot study , 1992 .