Programming spindle speed variation for machine tool chatter suppression

2003 ◽  
Vol 43 (12) ◽  
pp. 1229-1240 ◽  
Author(s):  
Emad Al-Regib ◽  
Jun Ni ◽  
Soo-Hun Lee
Keyword(s):  
Machine Tool ◽  
Spindle Speed ◽  
Speed Variation ◽  
Chatter Suppression ◽  
Spindle Speed Variation ◽  
Machine Tool Chatter ◽  
Tool Chatter

Machine-Tool Chatter Suppression by Multi-Level Random Spindle Speed Variation

1999 ◽  
Author(s):  
Alpay Yilmaz ◽  
Emad AL-Regib ◽  
Jun Ni
Keyword(s):  
Spindle Speed ◽  
New Method ◽  
Spindle System ◽  
Speed Variation ◽  
Chatter Suppression ◽  
Random Fashion ◽  
Spindle Speed Variation ◽  
Machine Tool Chatter ◽  
Multi Level ◽  
The Stability

Abstract This paper presents a new method for varying the spindle speed to suppress chatter in machining. The spindle speed is varied in pseudo-random fashion within the bandwidth of the spindle system. Both implementation issues and spindle system responses to such signals are investigated. A new method to analyze the stability of machining systems with varying spindle speed is also introduced. The effectiveness and advantages of the random spindle speed variation in chatter suppression is verified using numerical simulations and experiments.

Machine Tool Chatter Suppression by Multi-Level Random Spindle Speed Variation

2002 ◽  
Vol 124 (2) ◽  
pp. 208-216 ◽  
Author(s):  
Alpay Yilmaz ◽  
Emad AL-Regib ◽  
Jun Ni
Keyword(s):  
Spindle Speed ◽  
New Method ◽  
Spindle System ◽  
Speed Variation ◽  
Chatter Suppression ◽  
Random Fashion ◽  
Spindle Speed Variation ◽  
Machine Tool Chatter ◽  
Multi Level ◽  
The Stability

This paper presents a new method for varying the spindle speed to suppress chatter in machining. The spindle speed is varied in a pseudo-random fashion within the bandwidth of the spindle system. Both implementation issues and spindle system responses to such signals are investigated. A new method to analyze the stability of machining systems with varying spindle speed is also introduced. The effectiveness and advantages of the random spindle speed variation in chatter suppression is verified using numerical simulations and experiments.

Simulation for Sinusoidal Spindle Speed Variation Cutting in Time Domain Based on Simulink

2011 ◽  
Vol 188 ◽  
pp. 549-554
Author(s):  
Kuan Min Mao ◽  
Min Zhang ◽  
Ming Zhu ◽  
Ling Yin
Keyword(s):  
Time Domain ◽  
Amplitude Ratio ◽  
Block Diagram ◽  
Spindle Speed ◽  
Chatter Vibration ◽  
Speed Variation ◽  
Chatter Suppression ◽  
Spindle Speed Variation ◽  
Machine Tool Chatter ◽  
Nonlinear Mechanical

This paper presents a simulink block diagram which is constructed on the basis of a classical nonlinear mechanical model of machine tool chatter vibration. With varying amplitude ratio and frequency ,sinusoidal spindle speed variation (S3V) cutting process is investigated in time domain, which tests and verifies the feasibility of chatter suppression by S3V method.

Nonlinear Delay Equations With Fluctuating Delay: Application to Regenerative Chatter

2002 ◽  
Author(s):  
Ali Demir ◽  
N. Sri Namachchivaya ◽  
W. F. Langford
Keyword(s):  
Differential Equations ◽  
Machine Tool ◽  
Periodic Solutions ◽  
Stability Boundary ◽  
Spindle Speed ◽  
Regenerative Chatter ◽  
Machine Tool Chatter ◽  
Tool Motion ◽  
Nonlinear Delay ◽  
Tool Chatter

The mathematical models representing machine tool chatter dynamics have been cast as differential equations with delay. The suppression of regenerative chatter by spindle speed variation is attracting increasing attention. In this paper, we study nonlinear delay differential equations with periodic delays which models the machine tool chatter with continuously modulated spindle speed. The explicit time-dependent delay terms, due to spindle speed modulation, are replaced by state dependent delay terms by augmenting the original equations. The augmented system of equations is autonomous and has two pairs of pure imaginary eigenvalues without resonance. We make use of Lyapunov-Schmidt Reduction method to determine the periodic solutions and analyze the tool motion. Analytical results show both modest increase of stability and existence of periodic solutions close to the new stability boundary.

Simulation and Experimental Research on Chatter Suppression Using Chaotic Spindle Speed Variation

2011 ◽  
Vol 133 (1) ◽  
Author(s):  
Kong Fansen ◽  
Liu Peng ◽  
Zhao Xingang
Keyword(s):  
Experimental Methods ◽  
Chaotic Signal ◽  
Spindle Speed ◽  
Speed Variation ◽  
Chatter Suppression ◽  
Spindle Speed Variation ◽  
Cutting Chatter ◽  
Chatter Control ◽  
Suppression Process ◽  
Chaotic Codes

A method for varying the spindle speed using chaotic signal to suppress chatter in machining is developed. The effects of spindle speed variation on cutting chatter control between using chaotic and sinusoidal signals were analyzed by simulation and experimental methods. Various chaotic codes are used in the chatter suppression process, and it is found that LORENZ-1 code results in the smallest machine noise.

Online Chatter Suppression in Turning by Adaptive Amplitude Modulation of Spindle Speed Variation

2018 ◽  
Vol 140 (12) ◽  
Author(s):  
Longyang Ding ◽  
Yuxin Sun ◽  
Zhenhua Xiong
Keyword(s):  
Wavelet Packet ◽  
Bootstrap Method ◽  
Threshold Value ◽  
Spindle Speed ◽  
Speed Variation ◽  
Model Free ◽  
Chatter Suppression ◽  
Spindle Speed Variation ◽  
Model Free Controller

Although the effectiveness of spindle speed variation (SSV) method in chatter suppression has been extensively reported, the determination of optimal SSV parameters remains a challenge owing to the difficulties in obtaining accurate modal parameters especially under varying cutting conditions. This paper proposes a closed-loop SSV cutting system to suppress chatter in turning. The dimensionless SSV amplitude is adaptively adjusted with a model-free controller to accommodate change of the chatter level. The wavelet packet entropy (WPE) is computed online to evaluate quantitatively the machining state, and a predetermined chatter threshold is used to calculate the controller input. Energy-based analysis of SSV parameters effect on chatter shows that the amplitude is the more dominant parameter than the frequency. Then we introduce the scheme of the proposed chatter suppression system, where the Bootstrap method is adopted to determine the threshold value. Next, the feasibility of the proposed method for chatter suppression is tested by simulations with different cutting depths. Finally, comparisons of experimental results verify the conclusion of theoretical analysis about the effect of SSV parameters, and two cutting tests with diverse activating strategies are performed to validate the effectiveness of the proposed system for chatter suppression in turning.

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