There are lots of sources of disturbance in people’s surrounding environment - e.g. wind, sea, river flow, and intensive acoustic noise. These sources can cause auto vibrations of particular dynamic systems. Such phenomenon could be used for converting mechanical vibration energy to electrical energy. Solving this problem is topical because it could help to create autonomic sources of renewable energy. Dynamic model, described by a presumptive differential motion equation, of auto vibrating system, affected by airflow is made and inspected. Possible modes of vibrations and different states of nonlinear auto vibrating system are analyzed using methods of Newmark and Runge-Kutta. Auto vibration existence zones of the system are designated. Reliance on the existence of poly-solutions, stability or chaotic solutions of vibrating system is estimated. Consistencies of using electro dynamical principle of converting mechanical vibration energy to electric energy are inspected.