We are proposing a liquid rate gyro named “ECF micro rate gyro”. Although the sensing principle is based on that of a conventional gas rate sensor, the liquid micro rate gyro works by an electro-conjugate fluid (ECF) instead of a gas. The electro-conjugate fluid is a dielectric fluid that works as a functional fluid, generating a powerful jet flow (ECF jet) when subjected to a high DC voltage. ...

Even when the Global Positioning System (GPS) signal is blocked, a rate gyroscope (gyro) north finder is capable of providing the required azimuth reference information to a certain extent. In order to measure the azimuth between the observer and the north direction very accurately, we propose a multi-position non-continuous rotation gyro north finding scheme. Our new generalized mathematical m...

We present an in-depth analysis of the Kerr effect in resonator fiber optic gyros (R-FOGs) based on triangular wave phase modulation. Formulations that relate gyro output to the rotation rate, the Kerr nonlinearity, and other fiber and gyro parameters are derived and used to study the effect of Kerr nonlinearity on the gyro performance. Numerical investigation shows that the Kerr effect results...

In order to estimate and get the flight attitude, trajectory, launching speed, ejection altitude, landing point, landing speed and displacement, etc. of aircraft, parameters of six degree of freedom inertial measurement unit are usually acquired to establish the settlement data base in the design and study of aircraft. Moreover, the gyro used to measure the angular rate is an important part of ...

A Hemispherical Resonator Gyro (HRG) is the Coriolis Vibratory Gyro (CVG) that measures rotation angle or angular velocity using Coriolis force acting the vibrating mass. A HRG can be used as a rate gyro or integrating gyro without structural modification by simply changing the control scheme. In this paper, differential control algorithms are designed for a 2-piece HRG. To design a precision c...

We present two results on attitude estimation using vector and rate gyro measurements, when both sets of measurements are biased. The first result concerns an observer for attitude and gyro bias that has previously been presented by Hamel and Mahony, and by Mahony, Hamel, and Pflimlin, with proven almost-global stability results when either (i) the reference vectors in the inertial frame are st...

The problemof attitude and rate gyro bias estimation is addressed by resorting tomeasurements acquired from rate gyros and vector observations. A Set-Valued Observer (SVO) is proposed that has no singularities and that, for any initial conditions, provides a bounding set with guarantees of containing the actual (unknown) rotation matrix. The sensor readings are assumed to be corrupted by bounde...