THE DESIGN AND ANALYSIS OF EXPERIMENTS. By Oscar Kempthorne. New York, John Wiley and Sons, Inc., 1952. 631 pp. $8.50. This book by a teacher of statistics (as well as a consultant for \"experimenters\") is a comprehensive study of the philosophical background for the statistical design of experiment. It is necessary to have some facility with algebraic notation and manipulation to be able to use the volume intelligently. The problems are presented from the theoretical point of view, without such practical examples as would be helpful for those not acquainted with mathematics. The mathematical justification for the techniques is given. As a somewhat advanced treatment of the design and analysis of experiments, this volume will be interesting and helpful for many who approach statistics theoretically as well as practically. With emphasis on the \"why,\" and with description given broadly, the author relates the subject matter to the general theory of statistics and to the general problem of experimental inference. MARGARET J. ROBERTSON

The Design and Analysis of Experiments

Intelligent spindles are core components of the next-generation of intelligent/smart machine tools in the Industry 4.0 Era. The purpose of this paper is to clarify the concept of intelligent spindles and provide an in-depth review of the state-of-the-art of related technologies. A new integrated concept for intelligent spindles is proposed, followed by descriptions of required characteristics, key enabling technologies and expected intelligent functions. Relevant research that may be beneficial to the development of intelligent spindles is reviewed from six thrust areas, which include monitoring and control of tool condition, chatter, spindle collision, temperature/thermal error, spindle balance, and spindle health. Finally, current limitations and challenges are discussed, and future trends of intelligent spindles are prospected from various perspectives.

The concept and progress of intelligent spindles: A review

Dynamic modeling for rigid rotor bearing systems with a localized defect considering additional deformations at the sharp edges

A dynamic modelling method of a rotor-roller bearing-housing system with a localized fault including the additional excitation zone

In this paper, we present a review of the experimental identification of dynamic parameters of bearings in a rotating machine. Major emphasis is given to vibration-based identification methods and the review encompasses descriptions of experimental measurement techniques, mathematical modeling, parameter extraction algorithms and uncertainty in the estimates applied to a variety of bearings. The parameter extraction algorithms include the descriptions of governing equations of the rotor-bearing system and identification methods in both time and frequency domains. The identification techniques have been classified based on methods used to excite the system. The review includes a variety of bearings and similar components, which play an active link between the rotating and stationary parts of a machine. Based on the state of the art in bearing identification, conclusions are made and future directions are suggested.

Identification of Dynamic Bearing Parameters: A Review

The current study presents a multi-body dynamic model for investigating the vibration responses of a cylindrical roller bearing with localized surface defects such as dents on raceways. This model ...

https://journals.sagepub.com/doi/pdf/10.1177/1464419314546539

Dynamic modelling for vibration analysis of a cylindrical roller bearing due to localized defects on raceways

An improved ultrasonic method for lubricant-film thickness measurement in cylindrical roller bearings under light radial load

New electromagnetic ring balancer for active imbalance compensation of rotating machinery

The stability and bifurcation of a flexible rod-fastening rotor bearing system (RBS) is investigated in this paper. The rod-fastening rotor has two kinds of special structural features – rods and interfaces. The circumferentially distributed rods are modeled as a constant stiffness matrix and an add-on moment vector, which is caused by the unbalanced pre-tightening forces. The stiffness matrix of interface is composed of normal and tangential contact stiffness, which are determined by the pre-tightening forces. After the shaft is discretized by Timoshenko elements, the system is reduced by a component mode synthesis. Periodic motions and stability margins are obtained by using the shooting method and path-following technique, and the local stability of system is obtained by using the Floquet theory. Comparisons indicate that the rod-fastening and complete RBS have a general resemblance in the bifurcation characteristics when mass eccentricity and rotating speed are changed. The unbalanced over-tightening ...

Investigation on the stability and bifurcation of a rod-fastening rotor bearing system:

This paper presents a simplified model of misaligned-installing matched bearings, which is always constituted by two angular contact bearings in machine tools. Aiming at the effect of parallel misa...

Minqing Jing

Papers

Dynamic modelling for vibration analysis of a cylindrical roller bearing due to localized defects on raceways

An improved ultrasonic method for lubricant-film thickness measurement in cylindrical roller bearings under light radial load

New electromagnetic ring balancer for active imbalance compensation of rotating machinery

Investigation on the stability and bifurcation of a rod-fastening rotor bearing system:

Influence of misalignment on nonlinear dynamic characteristics for matched bearings-rotor system: