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Robot arms are described by their degrees of freedom. This is a practical metric, in contrast to the abstract definition of degrees of freedom which measures the aggregate positioning capability of a system. [3] In 2007, Dean Kamen, inventor of the Segway, unveiled a prototype robotic arm [4] with 14 degrees of freedom for DARPA.
The Stanford arm is an industrial robot with six degrees of freedom, designed at Stanford University by Victor Scheinman in 1969. [1] The Stanford arm is a serial manipulator whose kinematic chain consists of two revolute joints at the base, a prismatic joint, and a spherical joint. Because it includes several kinematic pairs, it is often used ...
Victor Scheinman at the MIT Museum with a PUMA robot in 2014 The Stanford arm, designed in 1969 by Scheinman and later built by him, was the first electric robot arm designed for computer control. Scheinman's MIT Arm, built for MIT's Artificial Intelligence Lab ca. 1972, forerunner of the PUMA Scheinman setting up his RobotWorld system in the ...
Stewart platforms are known by various other names. In many applications, including in flight simulators, it is commonly referred to as a motion base. [1] It is sometimes called a six-axis platform or 6-DoF platform because of its possible motions and, because the motions are produced by a combination of movements of multiple actuators, it may ...
Denavit–Hartenberg parameters. In mechanical engineering, the Denavit–Hartenberg parameters (also called DH parameters) are the four parameters associated with a particular convention for attaching reference frames to the links of a spatial kinematic chain, or robot manipulator. Jacques Denavit and Richard Hartenberg introduced this ...
SCARA. The SCARA is a type of industrial robot. The acronym stands for Selective Compliance Assembly Robot Arm[1] or Selective Compliance Articulated Robot Arm. [2] By virtue of the SCARA's parallel-axis joint layout, the arm is slightly compliant in the X-Y direction but rigid in the Z direction, hence the term selective compliance.
Serial robots usually have six joints, because it requires at least six degrees of freedom to place a manipulated object in an arbitrary position and orientation in the workspace of the robot. A popular application for serial robots in today's industry is the pick-and-place assembly robot, called a SCARA robot, which has four degrees of freedom.
Articulated robot. An articulated robot is a robot with rotary joints [citation needed] that has 6 or more Degrees of Freedom. This is one of the most commonly used robots in industry today (many examples can be found from legged robots or industrial robots). Articulated robots can range from simple 6 Degree of Freedom structures to systems ...
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