1. Pant‐tilt Platform Design Based on Parallel Kinematics
- Author
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Jorge Santolaria, A.C. Majarena, J.J. Pastor, Juan José Aguilar, and Cajal
- Subjects
Universal joint ,Engineering ,business.industry ,Kinematics ,Workspace ,Displacement (vector) ,law.invention ,Transformation matrix ,Position (vector) ,Control theory ,law ,Orientation (geometry) ,Systems design ,business ,Simulation - Abstract
A new long distance measurement system design, based on parallel kinematics, is presented in this paper. This system has two degrees of freedom for positioning and orientating two high precision cameras. In this document is presented the system design. Several configurations have been analyzed and the components needed such as actuators, linear captators (to measure the displacement), spherical ball‐and‐socket joints and universal joints, have been selected. The developed model allows us to obtain the kinematic joint variables, depending on geometric parameters, by means of the resolution of opened chains for each leg. The direct model allows us to obtain the platform position and orientation for a determined displacement values. Once the matrix transformation (which describes the coordinates of the platform reference system respect to the base reference system) is obtained, the actuators elongation can be found out through the inverse model with numeric or geometric methods. The design optimization, by means of the analysis of anchorage points and the study of singularities (analysis of the limited platform positions, depending on maximum strut lengths and maximum angle that joints can turn), allows us to optimize the workspace of the platform.
- Published
- 2009
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