Investigation of X and Y Configuration Modal and Dynamic Response to Velocity Excitation of the Nanometer Resolution Linear Servo Motor Stage with Quasi-Industrial Guiding System in Quasi-Stable State

Artur Piščalov, Edgaras Urbonas, Darius Vainorius, Jonas Matijošius and Artūras Kilikevičius
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Artur Piščalov: Department of Mechanical and Material Engineering, Vilnius Gediminas Technical University, 03224 Vilnius, Lithuania
Edgaras Urbonas: Department of Mechanical and Material Engineering, Vilnius Gediminas Technical University, 03224 Vilnius, Lithuania
Darius Vainorius: Institute of Mechanical Science, Vilnius Gediminas Technical University, 03224 Vilnius, Lithuania
Jonas Matijošius: Institute of Mechanical Science, Vilnius Gediminas Technical University, 03224 Vilnius, Lithuania
Artūras Kilikevičius: Institute of Mechanical Science, Vilnius Gediminas Technical University, 03224 Vilnius, Lithuania

Mathematics, 2021, vol. 9, issue 9, 1-25

Abstract: Research institutions and industrial enterprises demand high accuracy and precision positioning systems to fulfil cutting edge requirements of up-to-date technological processes in the field of metrology and optical fabrication. Linear motor system design with high performance mechanical guiding system and optical encoder ensures nanometer scale precision and constant static error, which can be calibrated by optical instruments. Mechanical guiding systems has its benefits in case of control theory and its stability; unfortunately, on the other hand, there exists high influence of structure geometry and tribological effects such as friction and modal response. The aforementioned effect cannot be straightforwardly identified during the assembly process. Degradation of dynamic units can be detected only after certain operating time. Single degree of freedom systems are well investigated and the effect of degradation can be predicted, but there exists a gap in the analysis of nanometer scale multi degree of freedom dynamic systems; therefore, novel diagnostic tools need to be proposed. In this particular paper, dual axes dynamic system analysis will be presented. The main idea is to decouple standard stacked XY stage and analyse X and Y configuration as two different configurations of the same object, while imitators of corresponding axes are absolutely solid and stationary. As storage and analysis of time domain data is not efficient, main attention will be concentrated on frequency domain data, while, of course, statistical and graphical representation of dynamic response will be presented. Transfer function, dynamic response, spectral analysis of dynamic response, and modal analysis will be presented and discussed. Based on the collected data and its analysis, comparison of X and Y responses to different velocity excitation will be presented. Finally, conclusions and recommendations of novel diagnostic way will be presented.

Keywords: mechanical bearings; linear motors; position control; velocity control; nanotechnologies; frequency response function; modal analysis; accelerometers; transfer function; dynamic error; robotics; CNC machines (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2021
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