An Investigation of the Behavior of the Simultaneous Three Axis Vibration System
SANTA BARBARA RESEARCH CENTER GOLETA CA
Pagination or Media Count:
Several high-rate production programs at Santa Barbara Research Center SBRC placed emphasis on finding economical and efficient screening systems. A quasi-random triaxial vibration system, including temperature cycling capability, was selected. Two Screening Systems, Inc., Multiaxial QRS-100s have been used at SBRC since June of 1980. The systems have also been successfully used for locating defects. Some defects that have shown up during screening could not be found in the rework cycle under quiescent conditions nor could they be located using a single-axis vibration system in conjunction with thermal cycling. To more thoroughly understand the behavior of the quasi-random multiaxis shaker, investigations of the motions in the time and frequency domains were undertaken, including the relationships between the three linear axes and between the three rotational axes. These investigations showed that the six axes of motion can be considered to be independent in terms of specimen response to the input motions.