Y glossary entries

The y-axis is the second reference axis of a coordinate system, often perpendicular to the x-axis and used to locate position, plot variables, or define model directions.

Y-parameters describe a two-port network by relating port currents to port voltages through an admittance matrix.

A Yagi-Uda antenna is a directional antenna made from a driven element, a reflector, and one or more parasitic director elements.

Yaw angle is the angular orientation of a vehicle or body about its vertical or body-z axis relative to a specified reference direction.

Yaw rate is the angular velocity of a vehicle or body about its vertical or body-z axis, usually measured by inertial sensors or estimated in motion models.

A yield criterion is a mathematical rule that predicts when a material begins plastic deformation under a multiaxial stress state.

Yield strength is the stress level at which a material begins to deform plastically under specified loading and test conditions.

A yoke is a forked, U-shaped, or frame-like component that connects, supports, guides, or transmits load between mechanical parts.

Young's modulus is the ratio of uniaxial stress to uniaxial strain in the linear elastic range of a material.

Yttria-stabilized zirconia is zirconium dioxide doped with yttrium oxide to stabilize desired crystal phases and create useful ceramic properties.