Testing Vibration Rectification Error with Vibrafuge

Investigation of this paper is a preliminary to the calibration of vibration rectification error (VRE) with multiple inputs. Considering the accelerometers stimulated by vibration and intended input, present testing methods for VRE cannot evaluate the exact influence of vibration. For measuring VRE caused by concurrent constant and vibratory accelerations, a multi-component mechanical system called vibrafuge was introduced. At first, combined accelerations produced by the vibrafuge was deduced by homogeneous coordinate transformation. Validation of testing VRE with vibrafuge is done by the equation of the combined accelerations. Then a general expression of the VRE caused by the combined accelerations was derived from a model of the accelerometer under test. Based on the VRE model, linear relation between the constant acceleration and VRE was testified by theoretical and numerical analysis.