Simulation Imitation of an Autogyro Controlled Longitudinal Motion

A.A.Kalmykov, O.E.Polyntsev, Ye.I.Somov

Institute of Systems  Dynamics and Control Theory, Russian Academy of Sciences

134, Lermontov Str., Irkutsk, 664033, Russia

somov@icc.ru

 

Principles of designing  the autogyro controlled longitudinal motion flight simulator (FS) and its working algorithm are considered. The FS allow one to solve a number of problems:

-               to develop and optimize the design decisions;

-               to define values of parameters describing stability and controllability of an autogyro and to determine other features of the autogyro dynamics;

-               to define loads acting on an autogyro structure during transient and unstable flight modes;

-               to evaluate mechanical loads during typical flight modes and execute computations of reliability and long strength;

-               to develop flight operating techniques for different flight configurations, aircraft masses and mass center locations;

-               to simulate an autogyro behavior at atmospheric turbulence conditions  and  the wind shear influence;

-               to determine dangerous flight regime frontiers and establish flight constrains;

-               to simulate unusual flight modes;

-               to determine a flight operating technique aimed at preventing critical flight regimes and a one for special flight cases;

-               to optimize a control law in order to goal function maximum reaching (for instance, to obtain the minimum of a take-off distance);

-               to develop logic and analyze the dynamics of an autogyro control system;

-               to make for flight tests;

-               to inquire aviation incidents and to prevent them by means of preliminary simulations.

FS algorithms applied can be the basis of flight training simulator design. The FS developed is used by the Light Aviation Design Bureau of the JSC Irkutsk Aviation Industrial Association (IAIA) during the A-002 multipurpose autogyro designing. As is known, during a initial design stage most of problems are solved within an aircraft flight dynamics model without at into account the structural flexibility and effects of aerodynamic nonstationarity features. At present, flight simulation models seem to be the most comfortable compact universal and applicable keeper of aircraft dynamic  feature information for an operative usage. Here the object of a simulation is an autogyro – the  vehicle whose lift is generated by a main rotor (MR) operating in the mode of autorotation, i.e. freely rotating under the rush of air stream. Autogyro propulsion thrust is created by power plant.