Matematični modeli dinamike helikopterskega letenja
Mathematical models of helicopter flight dynamics

english
slovenian

2007

volume 53, issue 2

Univerza v Ljubljani, Fakulteta za strojništvo

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).

16.09.2009