A novel variable force ratio test system for force measurement:

摘要

It is an important guarantee to precisely measure multi-dimensional force vector with variable directions. In this article, variable force ratio (force ratio is a concept of a ratio of maximum force over minimum force) test system based on piezoelectric effect is proposed to meet the requirement of force measurement characterized with variable force ratio. Force error analysis model of test system is established. Variable force ratio loading device is designed, realizing force ratios of loading forces from 1.4 to infinity by changing loading angle. The orthogonal static calibration, variable force ratio loading experiments as well as dynamic calibration can be completed based on the above systems. The results of orthogonal static calibration express that when resultant loading force is 5000?N, the maximum nonlinearity of X, Y, and Z direction is 1.95%, repeatability is only 0.06%. The results of static calibration of variable force ratio show that when angle is 2°, 5°, 10°, and 30°, the average deviation ...