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The roll center of a vehicle is the notional point at which the cornering forces in the suspension are reacted to the vehicle body. There are two definitions of roll center. The most commonly used is the geometric (or kinematic) roll center, whereas the Society of Automotive Engineers uses a force -based definition.
Instant centre of rotation of a rolling wheel broken down into points. By breaking down the rolling wheel into several points, it can be more easily seen how all points of the wheel rotate around a single point at each instant. This point is the instant centre of rotation, shown in black.
Flight dynamics is the science of air vehicle orientation and control in three dimensions. The three critical flight dynamics parameters are the angles of rotation in three dimensions about the vehicle's center of gravity (cg), known as pitch, roll and yaw.
Yaw, pitch and roll in an aircraft Yaw motion in an aircraft Mnemonics to remember angle names A yaw rotation is a movement around the yaw axis of a rigid body that changes the direction it is pointing, to the left or right of its direction of motion.
where is the linear excitation force complex amplitude per wave height. The RAO is a frequency dependent and complex function (the in the above expression is the imaginary unit). It is common to only consider the absolute value of the RAO if the phase between the excitation and the ship motions are irrelevant.
Roll moment is a moment, which is a product of a force and a distance, that tends to cause a vehicle to roll, that is to rotate about its longitudinal axis. [1]
Jacobian matrix and determinant – Matrix of all first-order partial derivatives of a vector-valued function; List of canonical coordinate transformations; Sphere – Set of points equidistant from a center; Spherical harmonic – Special mathematical functions defined on the surface of a sphere
A yaw damper (sometimes referred to as a stability augmentation system [1]) is a system used to reduce (or damp) the undesirable tendencies of an aircraft to oscillate in a repetitive rolling and yawing motion, a phenomenon known as the Dutch roll.