SOME SOLUTIONS ON DEVELOPMENT OF ELECTRONIC CONTROL SYSTEMS FOR A LOW-COST HEMISPHERICAL RESONATOR GYROSCOPE (HRG)

摘要

Since 1998 MEDICON has been developing a low-cost and small-sized hemispherical resonator gyroscope (HRG) for civil applications. Earlier our engineers' efforts were aimed at simplification of a gyro mechanical part and electronic control systems. It was suggested that in the sensor mechanical part a three-part sensor configuration should be replaced by a two-part design. Changes in electronic control systems were represented by a switch from the classical control algorithm of a wave pattern, which consisted in simultaneous application of force and signal voltages through different electrodes, to a simplified variant of electronic control which meant a timely control through the same electrodes. So, it was decided that HRG electronic control systems operation should be based on the following main principles: 1. electronic systems including those of oscillation measurement and control are designed on an impulse basis with an operation cycle, which is temporally divided into the intervals of measurement and control; 2. readout registration in a gyroscope is based on the so-called "reverse" pickoff technique, that is when output signals are read from the inner stem of the resonator.