In this paper we review the problem of measuring position and orientation using AC magnetic fields, outlining the two traditional solutions to the problem: analytical field models and field maps. We analyze the limitations of each of these solutions and present a novel solution to this problem, known as "adaptive magnetic tracking". We present an outline of the theoretical basis of the tracker, a discussion of its advantages and experimental results that demonstrate its unique and revolutionary abilities and flexibility.
KEYWORDS: Weapons, Avionic systems, Telecommunications, Sensors, Missiles, Head, Computing systems, Electronics, Data communications, Chemical elements
Integrating a Helmet Mounted Cueing System (HMCS) in a fast jet is a challenging task. Successful integration is subjected to numerous factors, from which system latency is one of the most important. An excellent mounted cueing system design by itself may not satisfy the latency requirements at the aircraft level. The bigger latency is, the bigger the gap between real world situation and the interpretation of this situation as presented to the pilot through his HMCS. System latency may induce difficulties in target acquisition by the pilot and other sensors of the aircraft (missile, radar, FLIR, weapon, etc.), it reduces pilot situation awareness and degrades system accuracy and performance. These effects may vary in different avionics configurations as well as in diversified flight conditions. This paper discusses the nature of latency effects in aircraft level, latency operational characteristics and requirements, and recommends approaches and methods to help overcome these effects.
The design and evaluation of display symbology for Helmet Mounted Displays (HMD), also known as Helmet Mounted Cueing Systems (HMCS), for fast jets is not a well established process. Yet a growing data base and the accumulating experience in design and evaluation of display symbology supply some of the fundamental tools that are required for the creation of such a process. Vision System International (VSI), through it's member companies, Kaiser Electronics and Elbit Systems Ltd. Has such experience gained in lab tests and development, studies, simulator evaluations, demonstration programs, flight tests, and operational experience. This paper describes some of the major considerations, guidelines and rules of thumb for the design and evaluation of display symbology for HMCS. While some display symbology issues are controversial, many display characteristics and considerations have been found to be commonly accepted by pilots around the world. This paper presents some of these characteristics and considerations, including: HMCS and HUD symbology compatibility, digital versus analog display formats, preferred display orientation, approaches for combined HMCS-HUD blanking, and personalized HMCS display formats. Keywords: Helmet Mounted Cueing System (HMCS), Helmet Mounted Displays (HMD), Head Up Display (HUD, symbology, display
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