Abstract Helicopters are characterized by complex missions, high risk, cost, reliability and long lead times. In order to adapt the more operational requirements in future, thesis addresses problems of iterative cycles, low efficiency model duality traditional helicopter operation analysis process, theory model-based systems engineering (MBSE) is introduced into for helicopter. A modelling desi...

In this paper, a nonlinear model of the underactuated six degrees of freedom (6 DOF) quadrotor helicopter was derived based on the Newton-Euler formalism. A new nonlinear robust control strategy was proposed to solve the stabilizing and path following problems in presence of external disturbances and parametric uncertainties. The proposed control structure consist of a sliding mode control base...

This paper present the results of attitude, velocity, heave and yaw controller design for UTM autonomous model scaled helicopter using identified model of vehicle dynamic from parameterized state-space model proposed by Mettler (2000) with quasisteady attitude dynamic approximation (6 DOF model). Multivariable state-space control methodology such as pole placement was used to design the linear ...

This paper presents an adaptive feedback linearization approach to derive helicopter. Ideal feedback linearization is defined for the cases when the system model is known. Adaptive feedback linearization is employed to get asymptotically exact cancellation for the inherent uncertainty in the knowledge of the given parameters of system. The control algorithm is implemented using the feedback lin...

This paper details the developments to date of an unmanned air vehicle (UAV) based on a standard size 60 model helicopter. The design goal is to have the helicopter achieve stable hover with the aid of an INS and stereo vision. The focus of this paper is on the development of an artificial neural network (ANN) that makes use of only the INS data to generate hover commands, which are used to dir...

Current trends in the design of helicopter have shown that in order to be economically viable and competitive it is necessary to investigate new design concept which may give an improvement in performance and operational flexibility goal and expanding the flight envelope of rotorcraft, but must be shown to be costeffective. The helicopter has carved a niche for itself as an efficient vertical t...

This work is centered in the definition of a transition management system for a small autonomous helicopter based on trajectory smoothing and a finite state machine (FSM). A smooth flight schedule decreases transients originated by direction changes and flight mode transitions (e.g., horizontal flight to hover mode). Although previous works have presented trajectory generation and FSM oriented ...