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直升机飞行力学 Helicopter dynamics chapter 4
- 1. Helicopter Flight Dynamics Chapter 3: Helicopter Motion Equations
- 3. Helicopter Motion Equations Longitudinal Motion is the summation of aerodynamic forces along the x axis. The three items in the right side are equivalent to ma . The first item comes from the acceleration, while the last two items are the inertial accelerations produced by the helicopter curve motions.
- 4. Helicopter Motion Equations For the pitching motion, we have: The lift side is the summation of aerodynamic moments . In the right side , the first item is the inertial moment caused by angular acceleration, the second item is the gyro moment, and the third item is effect of centripetal force. Lateral/yaw Motion
- 5. Helicopter Motion Equations The Relationship Between Angular Motions The attitude angles are respect to gravity axes. While the angular velocities are measured in body axes. The 6 equations of helicopter body and 3 angular motion equations consists of the governing equations of helicopter flight dynamics. The relationship between angular velocities and helicopter attitudes rates can be written as: Z D Z 1 Y 1 X 1