NASA LogoNTRSNTRS - NASA Technical Reports ServerSearchmore_vertCollectionsAboutNewsHelpLogin Back to ResultsSuppression of biodynamic interference in head-tracked teleoperationThe utility of helmet-tracked sights to provide pointing commands for teleoperation of cameras, lasers, or antennas in aircraft is degraded by the presence of uncommanded, involuntary heat motion, referred to as biodynamic interference. This interference limits the achievable precision required in pointing tasks. The noise contributions due to biodynamic interference consists of an additive component which is correlated with aircraft vibration and an uncorrelated, nonadditive component, referred to as remnant. An experimental simulation study is described which investigated the improvements achievable in pointing and tracking precision using dynamic display shifting in the helmet-mounted display. The experiment was conducted in a six degree of freedom motion base simulator with an emulated helmet-mounted display. Highly experienced pilot subjects performed precision head-pointing tasks while manually flying a visual flight-path tracking task. Four schemes using adaptive and low-pass filtering of the head motion were evaluated to determine their effects on task performance and pilot workload in the presence of whole-body vibration characteristic of helicopter flight. The results indicate that, for tracking tasks involving continuously moving targets, improvements of up to 70 percent can be achieved in percent on-target dwelling time and of up to 35 percent in rms tracking error, with the adaptive plus low-pass filter configuration. The results with the same filter configuration for the task of capturing randomly-positioned, stationary targets show an increase of up to 340 percent in the number of targets captured and an improvement of up to 24 percent in the average capture time. The adaptive plus low-pass filter combination was considered to exhibit the best overall display dynamics by each of the subjects.Document ID19910011821Acquisition SourceLegacy CDMSDocument TypeTechnical Memorandum (TM)AuthorsLifshitz, S.*(Technion - Israel Inst. of Tech. Haifa., United States)*Merhav, S. J.*(Technion - Israel Inst. of Tech. Haifa., United States)*Grunwald, A. J.*(Technion - Israel Inst. of Tech. Haifa., United States)*Tucker, G. E.*(NASA Ames Research Center Moffett Field, CA., United States)*Tischler, M. B.*(Army Aviation Systems Command Moffett Field, CA., United States)*Date AcquiredSeptember 6, 2013Publication DateJanuary 1, 1991Subject CategoryAircraft InstrumentationReport/Patent NumberA-91058NAS 1.15:103833NASA-TM-103833AVSCOM-TR-90-A-005Meeting InformationMeeting: European Rotorcraft ForumLocation: GlasgowStart Date: September 18, 1990End Date: September 20, 1990Accession Number91N21134Funding Number(s)PROJECT: RTOP 505-68-84Distribution LimitsPublicCopyrightWork of the US Gov. Public Use Permitted.Available DownloadsNameType19910011821.pdfSTIcloud_downloadcontent_copyvisibilityRelated RecordsThere are no records associated with this record.visibility_offNo Preview Available
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