Αποτελέσματα Αναζήτησης
The principal axes of rotation imply three reference planes, each perpendicular to an axis: Normal plane, or yaw plane. Transverse plane, lateral plane, or pitch plane. Longitudinal plane, or roll plane. The three planes define the aircraft's center of gravity.
The equations of motion have additional terms not presented in these lecture notes if the origin is not at the center of mass. • Axes: (x, y, z) • Unit vectors: (i, j, k) Airplane convention is: - x axis forward. - z axis “down”. - y axis out right wing.
\(\phi\) - The angle measured in the \(y-z\) plane of the body-axis system between the \(y\)-axis and the horizontal reference plane. Also known as the roll angle, it is a measure of the rotation about the \(x\) -axis.
Roll \((\phi)\) - The angle between the aircraft \(x_b/y_b\) plane, and the intermediate \(x_2/y_2\) plane - defined as rotation around \(x_2\). A transformation matrix is desired to enable the definition of, for two axes systems with co-located origins, what a set of co-ordinates in one axes system is in the other.
There are 3 axes systems which can be used in Aeronautics, Aerodynamics & Flight Mechanics: • Ground Axes – G(x0, y0, z0) • Body Axes – G(x, y, z) • Aerodynamic Axes – G(xa, ya, za) 1.1 Ground Axes (x0, y0, z0) are an orthogonal set of forces obeying the right hand rule.
The Axes of Flight . Each axis of flight is an imaginary line around which an airplane can turn. Think of an airplane rotating around an axis like a wheel rotates around an axle. Regardless of the type of aircraft, there are three axes upon which it can move: Left and Right, Forwards and Backwards, Up and Down.
z denote rotations about the Xaxis, Y axis and Zaxis, respectively. We can go from one reference frame to any other reference frame, using at most three Euler angles.
