Integrated avionics systems, helmet-mounted display systems

The paper discusses the problems of flight testing spatial orientation systems using the example of the IKW-8 heading and vertical reference system installed on Su-22 aircraft. The difficulties associated with the use of SOUD-type equipment (USSR) used for determining and removing magnetic deviation were analyzed. A method developed at ITWL for using a computer for spectral analysis of the magnetic deviation of a heading system was presented. The possibilities of building a computer diagnostic system for determining and removing magnetic deviation were presented.Using the GMK-3AE heading system (installed on Mi-17 helicopters) as an example, problems with magnetic deviation compensation in the case of using these systems in helmet-mounted display systems were discussed.
The possibilities of electronic calibration and modification of the previously used process of determining the magnetic deviation of the heading system were indicated. The implementation of this topic was accepted for funding by the Ministry of Science and Higher Education as part of a research and development project.
COMPENSATION FOR ERRORS IN THE HEADING REFERENCE UNIT OF THE HELMET MOUNTED DISPLAY SYSTEM USED IN AIR TRANSPORT SYSTEMS
Abstract
What is dealt with in the paper are issues of checking the attitude/heading reference unit exemplified with the inertial attitude and heading system IKW-8 of the Su-22 fighter bomber. Analysed have been problems with operational use of any system of the SOUD type (USSR) to define and remove magnetic deviation. A method (developed in ITWL) of applying the computer to spectral analysis of magnetic deviations in the heading-system indications has been introduced and followed with a short study on the feasibility of a computer-based diagnostic system to automatically determine and eliminate the magnetic deviation. With the heading reference system GMK-3AE built in the Mi-17 helicopter used as an example, issues with the compensation for the magnetic deviation have been discussed for the case of these units being applied to the helmet-mounted display systems. Pointed out are possibilities of both electronic calibration and improvement in the hitherto performed process of defining magnetic deviation. This project has been financed by the Ministry of Science & Higher Education of Poland as a research project (R&D). (…)

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