Fiber-Optic Gyroscopes for Automotive Applications

Abstract

We review recent developments in interferometric fiber-optic gyroscopes for automotive applications. These gyroscopes use only elliptical-jacket or elliptical-core polarization-maintaining fibers to make their optical systems immune to environmental effects, and all of them use open-loop phase-modulation signal processing circuitry. We have begun mass-production of a gyroscope for automotive navigation and location systems. Another gyroscope employing an application specific integrated circuit developed for reducing size, cost and power consumption outputs the rotation rate as an analog voltage, and can be used for automotive chassis control and navigation systems. A more accurate gyroscope and a three-axis FOG system combined with clinometers can be applied to motion measurement systems for chassis development and testing. For further enhancement in terms of size, cost, and accuracy, we have developed an integrated optical circuit and a gyroscope that uses it.

Nonsingular Terminal Sliding Mode Control of Uncertain Chaotic Gyroscope System Based on Disturbance Observer

“…Consider the uncertain chaotic gyroscope system (1), which satisfies Assumptions 1 and 2; the parameter adaptation law (14), disturbance observer (15), and terminal sliding mode controller (11)…”

“…As an important sensor in navigation system, gyroscope was first used in ship navigation. With the development of science and technology, up to now, it has been widely used in aviation, aerospace, missile, automobile, and other related fields [1][2][3][4] requiring orientation and balance. However, the gyro system often exhibits chaotic phenomenon, which will damage its applications.…”