Dynamic Simulation of the Flight Behavior of a Rotary-Wing Aircraft

In this paper we seek to present the mathematical model relating to flight dynamics of a rotary-wing aircraft. The procedure starts by linearizing the translational and rotational dynamics and rotational kinematic equations of motion based on perturbation theory. Some procedures are simplified and are implemented here, due to the complex modeling process. The second step is to obtain the linear form, which is fundamental in order to describe the stability and response of the small movements of the helicopter around a specific attitude. Finally, the dynamic behavior of two helicopters (AS355-F2 Squirrel and BO105-S123) was simulated employing MATLAB Simulink v7.6 (2008) [1]. The input data, status and control derivatives from an existing helicopter were employed. It is noteworthy that the linearized model developed here is valid for applications where a deeper representation of the aircraft is not required.