Micro torque calibration and measurement device for specialised electromagnetic components of inertial navigation system

The micro torque measurement and calibration technology is very important in the field of ships, aviation, and aerospace. Micro torque is one of the most important parameters of the key electromagnetic component of inertial navigation system, which is usually from the mN⋅m to μN·m. To measure its micro torque value, this paper introduces a standard torque device that can calibrate and measure the micro torque value of the electromagnetic components of inertial navigation systems. The device has a measurement range from 10⁻⁶ N·m to 10⁻⁴ N m, and a measurement uncertainty better than 1 % (k = 2). The device uses the micro-N·m torque calibration and measurement technology based on the flexure support, designs the ultra-thin, one-piece, and limit protection structure of the flexure support, realises the zero-stiffness support of the device, and solves the multi-degree-of-freedom torsional deformation problem of the flexure support, to make the micro-torque measurement range expand to 10⁻⁶ N m.