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Matematični modeli dinamike helikopterskega letenja
Cvetković, Dragan (Author), Radaković, Duško (Author)

URLURL - Presentation file, Visit http://www.dlib.si/details/URN:NBN:SI:doc-7KKEFNXD This link opens in a new window

Abstract
Helikopter se razlikuje od drugih prometno transportnih sredstev, ne le po svoji sestavi temveč tudi po možnostih svojega gibanja. Helikopter se lahko premika navpično, lahko lebdi v zraku, lahko se vrti na istem mestu, lahko se premika naprej in v stran, a lahko tudi kombinira vse te premike. Zaradi tega sta modeliranje in testiranje dinamike helikopterja zelo zapleten problem. Trenutno se problemi dinamike helikopterskega letenja v glavnem rešujejo z uporabo sodobnih računalnikov. Čeprav so za mnoge zahtevne probleme računalniki neizogibni, ne omogočajo razumevanja fizikalne plati problema. Na srečo je veliko problemov v zvezi s helikopterji mogoče analizirati brez preveč zapletenih izračunov in navadno je mogoče priti do preproste formule. Čeprav niso ustrezne za preračune, te formule, pri konstrukciji helikopterja, omogočajo zadovoljivo interpretacijo potrebnih aerodinamičnih in dinamičnih pojavov. Helikopter spada v skupino zračnih sistemov in njegovo tradicionalno modeliranje se deli na: a) prostorsko geometrijo in kinematiko in na b) dinamiko togega telesa in dinamiko zraka, skozi katerega se giblje. V zadnjem času, so se razvili naslednji modeli: c) elastičen model, odvisen od aerodinamičnih sil, d) model pogonskega sistema, e) model hidravličnih in drugih izvršilnikov za aerodinamično krmiljenje, f) model obnašanja pilota, g)model sistema navigacije in h) model problema vodenja. Matematični model, opisan v tem prispevku, se nanaša na a) in b).

Language:English
Keywords:helicopters, flight dynamics, mathematical models
Work type:Not categorized (r6)
Tipology:1.04 - Professional Article
Organization:FS - Faculty of Mechanical Engineering
Year:2007
Publisher:Association of Mechanical Engineers and Technicians of Slovenia et al.
Number of pages:str. 114-126
Numbering:Letn. 53, št. 2
UDC:629.735:533.6
ISSN on article:0039-2480
COBISS.SI-ID:10165275 Link is opened in a new window
Views:486
Downloads:138
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Record is a part of a journal

Title:Strojniški vestnik
Shortened title:Stroj. vestn.
Publisher:Zveza strojnih inženirjev in tehnikov Slovenije [et al.], = Association of Mechanical Engineers and Technicians of Slovenia [et al.]
ISSN:0039-2480
COBISS.SI-ID:762116 This link opens in a new window

Secondary language

Language:Slovenian
Title:Mathematical models of helicopter flight dynamics
Abstract:
The helicopter is a specific form of traffic-transportation, not just in termsof its structure but also in terms of its possibilities for motion. The helicopter can move vertically, hover in the air, turn around, move forward and move laterally, and it can also perform combinations of these movements. As a result, modeling and testing helicopter dynamics is a very complex problem. The problems in helicopter flight dynamics are mostly solved with theaid of modern computers. Though inevitably, with many complex problems, computers do not make it possible to understand the physical nature of the problem. Fortunately, many problems related to helicopters can be analyzed without overly complex calculus, and usually it is possible to obtain simple formulae. Though not suitable for calculus, these formulae, when designing thehelicopter, enable a satisfactory interpretation of the required aerodynamic and dynamic phenomena. The helicopter belongs to the group of aerospace systems and its traditional modeling may be divided into: a) three-dimensional (space) geometry and kinematics, and b) rigid-body dynamics and the fluid dynamics through which it moves. Recently, the following models were developed: c) the elasticity model in intersubordinance with a fluid, d) the propulsion system model, e) the hydraulic model and other actuators that achieve aerodynamic control, f) the pilot-behavior model, g) the navigation-system model, and h) the beacon-problem model. The mathematical model described in this paper is related to a) and b).

Keywords:helikopterji, dinamika letenja, matematični modeli

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