Design Sensitivity Analysis For Helicopter Handling Qualities

Except the performances,strength,comfortableness and reliabilityies,the design of helicopter should also satisfy the requirements of hangling qualities.The hangling qualities of the helicopter are not so good because of its own characteristics.So,how to improve helicopter hangling qualities by design is the aim of research work.In this thesis,based on the indexes requirements in ADS-33E-PRF,a method on sensitivityies analysis of helicopter hangling qualities indexes with respect to design parameters have been introduced.Then, the comprehensive modeling of the Black Hawk helicopter is established. Stabilities,the bandwidth and delay time of the Black Hawk helicopter have been analyzed,and shown in the level requirements of hangling qualities.Sensitivityies of stabilities, the bandwidth and delay time of the Black Hawk helicopter with respect to design parameters such as aerodynamic parameters,structural parameters and so on, have been analyzed. Influences of major design parameters for stabilities, the bandwidth and delay time of the Black Hawk helicopter in longitudinal and lateral have been analyzed for the regime of hover and forward fight.The sequences of the influences and the sensitivityies for the design parameters are given.The results have been proved in reason.The method introduced in this thesis can provide a basis for the design of helicopter hangling qualities.