Abstract

In order to analyse the trimming characteristics of gyroplane, a complete nonlinear dynamic equation is established, which is a seven-degree of freedom model. By using constraints, the quantity of unknown variables is equal to the quantity of equations. In the process of solving the equation, Levenberg-Marquardt algorithm is applied. After comparing the results of mathematical model to the flight test, it can be concluded that the seven degree of freedom model is valid.

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