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Record Details

Record 38 of 1373
Heavy-lift airship dynamics
Author and Affiliation:
Tischler, M. B.(Systems Technology, Inc., Hawthorne, CA, United States)
Ringland, R. F.(Systems Technology, Inc., Hawthorne, CA, United States)
Jex, H. R.(Systems Technology, Inc., Hawthorne, CA, United States)
Abstract: The basic aerodynamic and dynamic properties of an example heavy-lift airship (HLA) configuration are analyzed using a nonlinear, multibody, 6-degrees-of-freedom digital simulation. The slung-payload model is described, and a preliminary analysis of the coupled vehicle-payload dynamics is presented. Trim calculations show the importance of control mixing selection and suggest performance deficiencies in crosswind stationkeeping for the unloaded example HLA. Numerically linearized dynamics of the unloaded vehicle exhibit a divergent yaw mode and an oscillatory pitch mode whose stability characteristic is sensitive to flight speed. An analysis of the vehicle-payload dynamics shows significant coupling of the payload dynamics with those of the basic HLA. It is shown that significant improvement in the vehicle's dynamic behavior can be achieved with the incorporation of a simple flight controller having proportional, rate, and integral-error feedbacks.
Publication Date: May 01, 1983
Document ID:
19830047798
(Acquired Nov 30, 1995)
Accession Number: 83A29016
Subject Category: AIRCRAFT STABILITY AND CONTROL
Document Type: Journal Article
Publication Information: Journal of Aircraft (ISSN 0021-8669); 20; May 1983
Publisher Information: United States
Contract/Grant/Task Num: NAS2-10330
Financial Sponsor: NASA; United States
Organization Source: Systems Technology, Inc.; Hawthorne, CA, United States
Description: 9p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: AERODYNAMIC CHARACTERISTICS; FLIGHT CONTROL; HEAVY LIFT AIRSHIPS; CROSS FLOW; DIGITAL SIMULATION; HOVERING; PAYLOADS; PITCH (INCLINATION); YAW
Imprint And Other Notes: Journal of Aircraft (ISSN 0021-8669), vol. 20, May 1983, p. 425-433.
Miscellaneous Notes: p. 425-433
Availability Source: Other Sources
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