Abstract: Equations are derived for dynamic analysis of a parallel manipulator. Using the motor algebra, an equation for the equilibrium condition of forces and moments at each link is derived and ...

Abstract: The new concept of a mobile screw space is introduced in this paper. A mobile screw space is a set of motors for which the outer product of any two arbitrary elements belongs to the ...

Abstract: The screw theory is applied to determination of joint velocities of robot arms. The method described in this paper can be directly used for the straight line trajectory control of existing ...

Abstract: Many kinds of robot arms with five degrees of freedom are widely used in industry for arc welding, spray painting, assembling etc. It is necessary to be able to compute joint displacements ...

Abstract: A synthesis method has been developed for the parallel micromanipulator used in a precise positioning. Elastic deformation at notches are used as joint displacements. Since the joint displacements ...

Abstract: The algorithm developed in [1] for searching for extreme distance lines of robot arms with arbitrary skew joint axes can fail when applied to arms with special geometry. In this paper, ...

Abstract: In this paper the following two theorems are proved; 1) All intermediate joint axes of a robot arm with arbitrary number of joints intersect an extreme distance line between an arbitrary base ...

Abstract: Internal stress arising from a spherically symmetric, finite plastic strain is obtained on the basis of the Eshelby’s theory on inclusions with stress-free strain. Using the internal stress, ...

Abstract: Using internal stress arising from a spherically symmetric, finite plastic strain, creep of a hollow sphere subjected to inner and outer pressures, and also thermal stress, is discussed. If ...