Research on Relative Velocity Feedback Technology for a Low-Frequency Standard Vibration Table

• Published in: MĀPAN : journal of Metrology Society of India Vol. 36; no. 3; pp. 451 - 465
• Main Authors: Shang, Shuaikun, Yang, Xueshan, Gao, Feng
• Format: Journal Article
• Language: English
• Published: New Delhi Springer India 01.09.2021; Springer Nature B.V
• Subjects: Circuits; Derivation; Feedback; Frequency standards; Low frequencies; Mathematical and Computational Physics; Mathematical Methods in Physics; Measurement Science and Instrumentation; Numerical and Computational Physics; Original Paper; Physics; Physics and Astronomy; Resonance; Simulation; Theoretical; Vibration; Formant peak; Relative velocity feedback; Transfer function; Vibration table
• ISSN: 0970-3950; 0974-9853
• DOI: 10.1007/s12647-020-00423-z

Relative velocity feedback is a method that is used to improve the low-frequency characteristics of a standard vibration table. Under limited mechanical conditions, the distortion of the low-frequency band of the vibration table is greatly reduced by using relative velocity feedback. However, there is a resonance peak in the passband of the vibration table system. When the resonance peak is too large, the vibration table generates a self-excited oscillation, which affects the expansion of the frequency characteristics of the vibration table. This paper presents a simplified circuit model and theoretical derivation for such vibration table. The relationship between the resonance peak and the parts of vibration table is given by theoretical derivation and verified by a simulation and an experiment. Then, a method for reducing the resonance peak is also provided and verified.