1100 Series Applications

The 1100 Series Exciter Heads are capable of imparting static and dynamic forces up to 1000 lbs. each to structures of varying rigidity while providing the highest frequency response available in the industry. read more

Advantages of Hydraulic Excitation

The FFT analyzer has rapidly gained popularity for making frequency response measurements on mechanical systems. One reason for this popularity is the ability of these analyzers to quickly and easily measure frequency response functions using impulsive excitation generated by an impact hammer. read more

Dynamic On-Site Testing of Large Structures

In structural dynamics testing, artificial excitation is an important tool in obtaining controlled data on various structural vibration modes. The testing of very large structures such as bridges, buildings, and ships presents an excitation problem in that it may be impossible to shake the entire structure. read more

Jet Engine Multi-Axis Excitation

Input forces or reaction forces in complex machinery may have independent dynamic components in many different directions. For example, an automobile suspension experiences independent horizontal and vertical forces under normal operating conditions.read more

Tilted Pad Bearings

This paper reviews a long standing issue related to the stiffness and damping coefficients of tilting-pad (TP) bearings; namely, What is the nature of their frequency dependency?  read more

Understanding & Solving Mechanical Instabilities

Mechanical instabilities are self-excited vibration phenomena that occur in the machine tool, manufacturing, and process industries. Though not common, instabilities can lead to destructive vibration levels and costly repairs.  read more