| Rotor Aircraft Aerodynamic parameter Identification is the hot and difficult one of Aerodynamic parameters Identification, it is also its important step in the simulation. This paper mainly about the Aerodynamic parameter identification and the corresponding Tactical Flight Simulation of a certain type of helicopter vertical model .This paper include establish of helicopter identification model and the simulation model, flight test data preprocessing, aerodynamic parameters identification and mobility of Flight Simulation. First, through small deviation linear theory establish Aerodynamic Derivatives helicopter identification model, Establish vertical simulation model with the help of Derivation and analysis. Secondly, removed and fixed outliers of Flight test data. Design a low-pass filter to filter out the high frequency data noise. Use the center interpolation algorithm for data smoothing secondary. Then respectively use the least-squares algorithm, expanded matrix method, maximum Likelihood recursive algorithm, generalized Least Squares to identify the aerodynamic parameters of rotation landing model. Use the Lagrangian multiplier method to identify complex multiple-input multiple-output model helicopter aerodynamic parameters. By fitting simulation the paper confirmed these methods can get the correct parameter identification results. At the same time the paper confirmed recursive least squares algorithm can not get a good Identification results because of the complexity autorotation landing process and the limit of small deviations linear conditions. Then discuss several methods'application conditions. Finally, calculating aerodynamic and torque with the help of aerodynamic derivatives identified from model flight test data. Then use simulation model for vertical mobility flight simulation. Helicopter's Dolphin Campaign for preliminary discussion. Come to the conclusion of this model can be conducted vertical Tactical Flight Simulation.
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