This report develops a six degrees of freedom linear model for helicopter flight dynamics applications. The main assumption made is that the changes in rotor attitude relative to the body are small compared to the changes in the body attitude which is available in the low-frequency domain. The body linear model results writing to non-linear equations of motion with respect to three directions and three rotations are then linearsing these equations around a suitable trim condition. The model is quasi-static in nature and considers the rotor aerodynamics forces and moments through their contributions to the 6x6 matrix of derivatives. Therefore, the dynamic effect of the rotor modes is not considered. The model can be applied to any existing helicopter.
Six Degrees of Freedom Linear Model for Helicopter Trim and Stability Calculation
1996
88 pages
Report
No indication
English
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