1. Kinematic calibration of a 2-DOF spatial parallel mechanism.
- Author
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Majarena, A. C., Santolaria, J., Samper, D., and Aguilar, J. J.
- Subjects
KINEMATICS ,DEGREES of freedom ,CALIBRATION ,MATHEMATICAL models ,DATA analysis ,ALGORITHMS ,NUMERICAL analysis - Abstract
This paper presents a new calibration procedure to identify the geometric parameters which improve the kinematic model accuracy of a mechanism. This procedure has been applied to a 2-DOF spatial parallel mechanism, obtaining the identified parameters by means of the direct kinematic model and reducing the position error of the moving platform. Data acquisition is performed by measuring three standard spheres, fixed to the moving platform, by means of a coordinate measuring machine. The method implemented defines an objective function which is optimized though a numerical method based on the Levenberg-Marquardt algorithm. This function compares the measured and calculated moving platform coordinates and minimizes this difference. Results show that in both cases, identification and test position, the position error is reduced considerably. The method developed can be easily generalized to other parallel mechanism. [ABSTRACT FROM AUTHOR]
- Published
- 2012
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