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  2. Polar diagram (sailing) - Wikipedia

    en.wikipedia.org/wiki/Polar_diagram_(sailing)

    A polar diagram, or polar plot, is a graph that shows a sailboat's potential speed over a range of wind speeds and relative wind angles. [1] It normally consists of the right side of a line chart with the radius representing the yacht speed and the angle representing the wind direction blowing from top to bottom.

  3. Spherical coordinate system - Wikipedia

    en.wikipedia.org/wiki/Spherical_coordinate_system

    Once the radius is fixed, the three coordinates (r, θ, φ), known as a 3-tuple, provide a coordinate system on a sphere, typically called the spherical polar coordinates. The plane passing through the origin and perpendicular to the polar axis (where the polar angle is a right angle) is called the reference plane (sometimes fundamental plane).

  4. Spherical robot - Wikipedia

    en.wikipedia.org/wiki/Spherical_robot

    A spherical robot, also known as spherical mobile robot, or ball-shaped robot is a mobile robot with spherical external shape. [1] A spherical robot is typically made of a spherical shell serving as the body of the robot and an internal driving unit (IDU) that enables the robot to move. [2] Spherical mobile robots typically move by rolling over ...

  5. Drag curve - Wikipedia

    en.wikipedia.org/wiki/Drag_curve

    The drag curve or drag polar is the relationship between the drag on an aircraft and other variables, such as lift, the coefficient of lift, angle-of-attack or speed. It may be described by an equation or displayed as a graph (sometimes called a "polar plot"). [1] Drag may be expressed as actual drag or the coefficient of drag.

  6. Robot kinematics - Wikipedia

    en.wikipedia.org/wiki/Robot_kinematics

    In robotics, robot kinematics applies geometry to the study of the movement of multi-degree of freedom kinematic chains that form the structure of robotic systems. [ 1 ] [ 2 ] The emphasis on geometry means that the links of the robot are modeled as rigid bodies and its joints are assumed to provide pure rotation or translation .

  7. Cartesian coordinate robot - Wikipedia

    en.wikipedia.org/wiki/Cartesian_coordinate_robot

    Kinematic diagram of Cartesian (coordinate) robot A plotter is a type of Cartesian coordinate robot.. A Cartesian coordinate robot (also called linear robot) is an industrial robot whose three principal axes of control are linear (i.e. they move in a straight line rather than rotate) and are at right angles to each other. [1]

  8. Delta robot - Wikipedia

    en.wikipedia.org/wiki/Delta_robot

    Delta robot of the FlexPicker series by ABB. Sketchy, a portrait-drawing delta robot [1] A delta robot is a type of parallel robot [2] that consists of three arms connected to universal joints at the base. The key design feature is the use of parallelograms in the arms, which maintains the orientation of the end effector. [3]

  9. Polar diagram - Wikipedia

    en.wikipedia.org/wiki/Polar_diagram

    A polar diagram could refer to: Polar area diagram, a type of pie chart; Radiation pattern, in antenna theory; A diagram based on polar coordinates; Spherical coordinate system, the three-dimensional form of a polar response curve; In sailing, a Polar diagram is a graph that shows a sailing boats potential wind speed over a range of wind and ...