Measuring and Managing Dynamics of Precision Machines
K. Scott Smith, University of North Carolina at Charlotte

Whether we like it or not, all assemblies of mechanical components in precision machines possess dynamic characteristics. They have masses, stiffnesses, damping, natural frequencies, and mode shapes. Depending on the circumstances, these characteristics may negatively impact the performance of precision machines. From foundations, to axis motions, to machining, to noise reduction, dynamic characteristics often present difficult design and operational challenges

.In order to diagnose and solve problems related to machine dynamics, measurements of the dynamic characteristics are required. This tutorial will describe the various techniques available for measurement of these characteristics, and approaches to improve dynamic performance. Instruments, hardware, software, and measurement methodologies will be described and demonstrated. Practical, intuitive ways to enhance understanding of machine behavior using the Fourier Transform, windowing, Frequency Response Functions, and more will be presented.