System identification of XY table ballscrew drive system

Romlee, Wan Fatin Athirah (2015) System identification of XY table ballscrew drive system. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

System identification is the first step in any controller design process for a mechatronic system. This process is carried out with the aim of obtaining a transfer function that can accurately represent the system input and output so that control design strategies can later be applied to improve performance of a system. In this project, the system identification process is carried on a basic CNC machine structure which is XY table ballscrew drive system using one of the well-known technique for system identification which is frequency domain approach. There are two type of frequency domain approaches which are non-parametric and parametric frequency domain approaches and both are applied in this project. Moreover, comparison of mathematical models obtained from the parametric approaches used was also being done in order to obtain the most accurate transfer function to represent the system. The result was judge based on the requirement during model validation procedure like the value of parameter confidence intervals and graphical observations of the best fit models.

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