Accession Number : ADA331767

Title :   Helmet-Mounted Display Design Guide

Descriptive Note : Contractor rept.

Corporate Author : CREW SYSTEMS CONSULTANTS SAN MARCOS TX

Personal Author(s) : Newman, Richard L. ; Greeley, Kevin W.

PDF Url : ADA331767

Report Date : 03 NOV 1997

Pagination or Media Count : 426

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.

Descriptors :   *HUMAN FACTORS ENGINEERING, *HELMET MOUNTED DISPLAYS, *HEAD UP DISPLAYS, LINE OF SIGHT, FLIGHT TESTING, COCKPITS, FLIGHT TRAINING, PILOTS, AIR NAVIGATION, VISUAL PERCEPTION, DATA DISPLAYS, FLIGHT MANEUVERS, PHYSIOLOGICAL DISORIENTATION, VISUAL ACUITY, FLIGHT HELMETS.

Subject Categories : Flight Control and Instrumentation
      Human Factors Engineering & Man Machine System

Distribution Statement : APPROVED FOR PUBLIC RELEASE