METHOD AND DEVICE FOR COMBINED TESTING OF PLATFORM-FREE INERTIAL MEASURING UNIT ON THE BASE OF MICROMECHANIC GYROS AND ACCELEROMETERS Russian patent published in 2005 - IPC

FIELD: measurement technology.

SUBSTANCE: method is based upon determining characteristics of platform-free inertial measuring units (PFIMU) under conditions of simultaneous influence of dynamic and temperature test parameters. Direction of axis of combined dynamic influence onto PFIMU preset in advance and PFIMU is installed in such a manner that it geometric center coincides with axis of combined dynamic influence onto PFIMU. Test are conducted for any preset direction of spatial orientation of measurement coordinate system of PFIMU relatively axis of combined dynamic influence which is achieved due to rotation of PFIMU around mentioned geometric center of its measurement coordinate system. Device has testing platform for fixing PFIMU on it. Vertically oriented axis of rotation of single-axis bed provided with turning platform is built into space of thermal chamber through the hole in its lower part. Vibration-testing machine is fastened tightly to the platform by means of rigid bad provided with load compensation low-frequency isolation and automatic compensation system. Axis of defining of vibration acceleration of vibration-testing machine is aligned with axis of rotation of single-axis bed. Two-axis gimbal suspension is tightly fixed onto working surface of vibration-testing machine. Testing platform for fixing PFIMU is mounted onto the gimbal suspension. Internal axis of rotation of the platform is aligned with axis of rotation of single-axis bed and with axis of defining of vibration accelerations of vibration-testing machine. Precision characteristic of micromechanical of gyroscopic sensitive elements of PFIMU can be calibrated as well as resource testing of PFIMU can conducted within wider temperature and speed range. Vibration influence and linear overloads can be applied also.

EFFECT: ten times shorter time for conducting test; reduced cost of testing.

5 cl, 1 dwg