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Wash trade refers to the activities of traders who utilise deliberately designed collusive transactions to increase the trading volumes for creating active market impression. Wash trade can be damaging to the proper functioning and integrity of capital markets. Existing work focuses on collusive clique detections based on certain assumptions of trading behaviours. Effective approaches for analysing...
This paper presents a new principle and method of kinematics to analyze the singularity of Stewart-Gough parallel manipulators and addresses the property identification of the position-singularity loci of 6-3 Stewart-Gough manipulators for some special orientations. Based on the kinematics relationship of a rigid body, a necessary and sufficient condition that three velocities of three non-collinear...
This paper mainly addresses the orientation-singularity and orientation capability analyses of the Stewart-Gough manipulator. Based on a particular kind of orientation representation of the manipulator, a polynomial expression of thirteen degree in the mobile platform orientation parameters is derived, which represents the orientation-singularity locus of the manipulator at a given position, and graphical...
This paper addresses the direct kinematics of a special class of the 6-6 SPS Stewart-Gough manipulators in which the moving and base platforms are two similar semisymmetrical hexagons. After proposing a mathematical model of the direct kinematic problem of this class of the Stewart-Gough manipulators, a multivariate polynomial equations set with respect to the moving platform position parameters and...
In our previous papers, we proposed a vertical-type permanent magnet (PM) linear synchronous motor (LSM) rocket launcher system of which four acceleration guide-ways with armature-windings are arranged symmetrically along a shaft of about 3.8 m. We analyzed the characteristics of propulsion, levitation and guidance forces of PM LSM in the derived vertical-type PM LSM rocket launcher system by using...
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