Uncertainties simulation in hover/low speed for unmanned helicopter

Uncertainties caused by modeling and flight of unmanned helicopter often simulated in the process of the control design. At present, many uncertainties are described by adding some easy little motion to the nonlinear model, which can't be accurately reflected in the MATLAB. For the way, this paper advanced a way to describe the uncertainties base on the complex plant characteristic in hover/low speed of the unmanned helicopter. The uncertainties simulation model was developed on MATLAB. This method could reflect the uncertainties in hover/low speed of unmanned helicopter easily, quickly and correctly.