Active Vibration Control of Test Equipment Through Feedback Algorithm

摘要

Items can be exposed to complex dynamic stresses during transportation and handling. Vibration testing controls the input of these stress tests and is used to determine the item's ability to function in real world conditions. Vibration testing is used by introducing of a force function into system, usually with the use of a shaker or vibration testing machine. The basis for vibration testing is discrete closed loop control of vibratory excitation, commonly known as vibration control. The level of vibration is sensed by the control accelerometer, which is monitored in a decision module. The controller then makes the necessary adjustments to condition the drive signal so that the vibration level meets the test specifications. Throughout this paper we present the methods used for continuous closed loop, discrete closed loop control and open loop control for sine sweep and random vibration tests.