公开(公告)号：WO1996007835A1

公开(公告)日：1996-03-14

申请号：PCT/US1995011294

申请日：1995-09-06

Applicant: THE UNIVERSITY OF CONNECTICUT

Inventor： THE UNIVERSITY OF CONNECTICUT ,  OLGAC, Nejat

IPC: F16F07/00

CPC classification number: F16F7/1011

Abstract: Vibrations are damped by determining two principal frequencies of excitation for the structure and coupling thereto a damping member (DFFDR) to produce an absorber. The spring damper characteristics of the absorber are determined at these frequencies and the displacment of the damping member is monitored. The monitored displacement of the damping member is processed together with the spring damping characteristics of the absorber to output a signal (f). This produces two frequencies of vibration in the damping member (DFFDR) substantially equal to the determined frequencies of excitation and thereby produces resonance of the damping member (DFFDR) at the determined frequencies of excitation. The resonance is effective to damp the vibrations at the determined frequencies of excitation.

Abstract translation: 通过确定结构的两个主频率和耦合到阻尼构件（DFFDR）以产生吸收体来减振振动。 在这些频率下确定吸收器的弹簧阻尼器特性，并且监测阻尼构件的位移。 阻尼构件的监测位移与吸收器的弹簧阻尼特性一起被处理以输出信号（f）。 这在阻尼构件（DFFDR）中产生基本上等于所确定的激励频率的两个振动频率，从而在确定的激励频率下产生阻尼构件（DFFDR）的共振。 谐振有助于在确定的激励频率下抑制振动。

公开(公告)号：WO2006127709A2

公开(公告)日：2006-11-30

申请号：PCT/US2006/019921

申请日：2006-05-23

Applicant: THE UNIVERSITY OF CONNECTICUT ,  OLGAC, Nejat

Inventor： OLGAC, Nejat

IPC: B23Q11/00 ,  G06F19/00

CPC classification number: B23Q17/0976 ,  G05B19/404 ,  G05B2219/41256 ,  G05B2219/50015 ,  Y10T82/10 ,  Y10T82/2595 ,  Y10T409/303752 ,  Y10T409/304312

Abstract: Systems and methods are provided for use in assessing the stability of simultaneous machining (SM) dynamics (which is also known as parallel machining). In SM, multiple cutters, which are generally driven by multiple spindles at different speeds, operate on the same work-piece. In an alternative implementation of SM, single milling cutters with non-uniformly distributed cutter flutes operate on a work-piece. When SM is optimized in the sense of maximizing the rate of metal removal constrained with or by the machined surface quality, "chatter instability" phenomenon appears. The present disclosure declares the complete stability picture of SM chatter within a mathematical framework of multiple time-delay systems (MTDS). A cluster treatment of characteristic roots (CTCR) procedure determines the regions of stability completely in the domain of the spindle speeds for varying chip thickness, thereby replicating the well-known "stability lobes" concept of STM for simultaneous machining.

Abstract translation: 提供的系统和方法用于评估同时加工（SM）动力学（也称为并行加工）的稳定性。 在SM中，通常由不同速度的多个主轴驱动的多个切割器在相同的工件上操作。 在SM的替代实施中，具有不均匀分布的切割槽的单铣刀在工件上操作。 当SM被最大限度地提高被加工表面质量受到限制的金属去除速度时，SM出现“颤动不稳定”现象。 本公开声明在多个时间延迟系统（MTDS）的数学框架内的SM抖动的完整稳定性图。 特征根（CTCR）程序的集群处理在不同芯片厚度的主轴转速范围内完全确定了稳定区域，从而复制了STM的众所周知的“稳定性波瓣”概念，用于同时加工。

公开(公告)号：EP0731884A1

公开(公告)日：1996-09-18

申请号：EP95934965.0

申请日：1995-09-06

Applicant: THE UNIVERSITY OF CONNECTICUT

Inventor： OLGAC, Nejat

IPC: F16F7

CPC classification number: F16F7/1011

Abstract: Vibrations are damped by determining two principal frequencies of excitation for the structure and coupling thereto a damping member (DFFDR) to produce an absorber. The spring damper characteristics of the absorber are determined at these frequencies and the displacment of the damping member is monitored. The monitored displacement of the damping member is processed together with the spring damping characteristics of the absorber to output a signal (f). This produces two frequencies of vibration in the damping member (DFFDR) substantially equal to the determined frequencies of excitation and thereby produces resonance of the damping member (DFFDR) at the determined frequencies of excitation. The resonance is effective to damp the vibrations at the determined frequencies of excitation.