The development of a six-component force/moment sensor testing machine and evaluation of its uncertainty

摘要

This paper describes the design and fabrication of a six-component force/moment sensor testing machine and the evaluation of its uncertainty. This testing machine, which generates forces F{sub}x (x-direction force), F{sub}y and F{sub}z from 50 to 500 N each and moments M{sub}x (x-direction moment), M{sub}y and M{sub}z from 5 to 50 N m each, simultaneously or separately, consists of a body, a fixture, a force generating system. a moment generating system, weights and a control system. Forces and moments are automatically generated by the control system composed of a computer, three step motors and so on. Also, the relative expanded uncertainty of the testing machine is evaluated. The results show that the relative uncertainties for force components ±F{sub}x and ±F{sub}y and moment components ±M{sub}x and ±M{sub}y are less than 8.6 × 10{sup}(-4) and those for force components +F{sub}z and -F{sub}z and moment components ±M{sub}z are less than 1.7±10{sup}(-3), 1.2 × 10{sup}(-5) and 1.7 × 10{sup}(-3) respectively.