Sensorless control of a three-degree-of-freedom ultrasonic vibration tool holder

Date

2019-07-01

Author

Gao, Jian
Çalışkan, Hakan
Altintas, Yusuf

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

202
views

0
downloads

Piezoelectric actuators are commonly used to deliver vibrations with an amplitude range of (5 mu m-25 mu m) at ultrasonic frequencies (>= 15 kHz) in machining applications. The natural frequencies of ultrasonic vibration actuators vary under the varying cutting force disturbances during machining. Consequently, the amplitudes of delivered vibrations deviate from the desired reference values. As opposed to using vibration sensors, this paper presents a sensorless method to track and control the frequency and amplitude of ultrasonic vibrations during machining. The dynamic model of the actuator is first modeled to obtain a transfer function between the supply voltage and driving current. An observer with Kalman filters per actuator direction is designed to estimate the vibration velocity amplitude and the phase between the supply voltage and current. The estimated vibration amplitude is used as a feedback in a proportional integral (PI) controller to maintain at the desired level during machining. The estimated phase is also kept at the desired reference level by pushing the excitation frequency towards resonance with another PI controller. The proposed control method has been digitally implemented in controlling a three degree of freedom rotary ultrasonic vibration actuator, and the crosstalks between the axes have been compensated when generating elliptical vibrations. The system has been experimentally tested in unidirectional turning and drilling, as well as two directional milling with elliptical vibrations.

Subject Keywords

General Engineering

URI

https://hdl.handle.net/11511/46742

Journal

Precision Engineering

DOI

https://doi.org/10.1016/j.precisioneng.2019.05.005

Collections

Department of Mechanical Engineering, Article

Suggestions

OpenMETU
Core

CMOS planar spiral inductor modeling and low noise amplifier design Telli, A; Demir, S; Askar, M (Elsevier BV, 2006-01-01) During this study, various narrowband single-ended inductive source degenerated Low Noise Amplifiers (LNAs) for GSM and S-band low earth orbit (LEO) space applications have been designed, simulated and compared using Mietec CMOS 0.7 mu m process and the Cadence/BSIM3v3. To get more realistic results, parasitic effects due to layout have been calculated and added to the simulations. Also, considering the inductive source degenerative topology, most of the attention is given on the modeling of planar spiral i...
DIRECTIONAL DEPENDENCE OF EXTRAORDINARY INFRARED OSCILLATOR PARAMETERS OF TLGAS2-TYPE LAYER CRYSTALS Hasanlı, Nızamı; TAGIROV, VI (Elsevier BV, 1983-01-01) The directional dispersion of IR-active modes of TlGaS2, TlGaSe2 and TlInS2 layersingle crystals has been investigated, depending on the angle between the phonon wave vector q and the optical c-axis. Owing to the possibility of preparation crystals with various orientations of reflecting surfaces with respect to the optical c-axis, it was of interest to check the applicability of the generalized Born and Huang theory of long-wave optical vibrations in uniaxial crystals to TlGaS2-type layer crystals.
Axisymmetric crack problem for a hollow cylinder imbedded in a dissimilar medium Kadıoğlu, Fevzi Suat (Elsevier BV, 2005-05-01) The analytical solution for the linear elastic problem of flat annular crack in a transversely isotropic hollow cylinder imbedded in a transversely isotropic medium is considered. The hollow cylinder is assumed to be perfectly bonded to the surrounding medium. This structure, which can represent a cylindrical coating-substrate system, is subjected to uniform crack surface pressure. Because of the geometry and the loading, the problem is axisymmetric. The z = 0 plane on which the crack lies, is also a plane ...
COMPUTER-AIDED ANALYSIS OF MICROSTRIP ANTENNAS EMPLOYING PARASITIC ELEMENTS HAYIRLIOGLU, L; Birand, Mehmet Tuncay (Wiley, 1993-10-01) The moment method in the spectral domain is used to perform a computer-aided analysis of printed antenna structures employing tuning stubs and electromagnetically coupled patches. Variation of the input VSWR versus frequency is obtained and the radiation patterns are plotted for various antenna configurations. Surface wave coupling effects are investigated. (C) 1993 John Wiley & Sons, Inc.
Investigation of Au-Ag-Cu Alloy Electrodeposition to Electromechanical Systems Cagan, Berkay; ERDOĞAN, METEHAN; Karakaya, İshak; Yilmaz, Cemil; Yurdakul, Burak (2020-04-01) © 2020 ECS - The Electrochemical Society.Electromechanical systems, which provide electrical power and data connection between moving terminals require high conduction and erosion resistant surfaces. Transfers of electrical power and data are accomplished by the contact of drum and brush wires. The simultaneous electrochemical deposition of desired Au-Ag-Cu alloy compositions, which can be used to coat the brush wires, was investigated in this study. In the scope of the study, the static potential and cycli...

Citation Formats

J. Gao, H. Çalışkan, and Y. Altintas, “Sensorless control of a three-degree-of-freedom ultrasonic vibration tool holder,” Precision Engineering, pp. 47–56, 2019, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/46742.