Measurement of modal damping by electronic speckle shearing interferometry

✍ Scribed by W.O. Wong; K.T. Chan

• Book ID: 104160291
• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 300 KB
• Volume: 30
• Category: Article
• ISSN: 0030-3992
• DOI: 10.1016/s0030-3992(98)00024-3

✦ Synopsis

A time-average electronic speckle shearing interferometer (ESSI) has been used for modal damping measurement. This is eected by a new fringe enhancement technique. The damping factor of a cantilever measured by using this technique agrees well with the value measured by using the accelerometer method. The study shows that time-average speckle interferometry can be used as a convenient tool for modal damping measurement.