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. ...

A Kalman filter approach for combining the outputs of an array of high-drift gyros to obtain a virtual lower-drift gyro has been known in the literature for more than a decade. The success of this approach depends on the correlations of the random drift components of the individual gyros. However, no method of estimating these correlations has appeared in the literature. This paper presents an ...

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...

In this theoretical paper, the wide-band low-gain feature of a tapered smooth wall gyro-traveling wave tube (gyro-TWT) was combined with the low beam energy, low magnetic field, and high gain, though narrow band, feature of a vane loaded nontapered gyro-TWT, to propose a distributed, tapered vane loaded gyro-TWT for both high gains and wide bandwidths. The device was analyzed for the tapering o...

A generalized linear theory that allows for mismatched boundary conditions was used in determining the starting oscillation conditions for gyrotron backward wave oscillators (gyro-BWO). The results reveal that the gyro-BWO interaction is normally caused by the interference between a constant-amplitude backward wave and a decaying backward wave. The latter becomes a forward-growing wave if the o...

In some aerospace vehicles, the tracking sensors which act in a tracking loop as stabilizer are mounted on a two degree of freedom gyro. The gyro must align its rotor axis with the line of sight in order to remove tracking errors. The tracking precision and sensitivity are functions of the gyros performance. One of the main factors in reducing the precision and producing instabilities is nutati...

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...

An efficiency enhancement for a gyrotron backward-wave oscillator (gyro-BWO) through local variation of guiding magnetic field by special law is investigated using computer simulation. As result, more number of bunched beam electrons take up position in energy-losing phase for chosen gyro-BWO’s parameters or other gyro-devices. An accelerator device buncher provides analogous effect for acceler...

This paper is concerned with the benefits of using rotational measurements of a gyroscope in conjunction with optical flow to determine the instantaneous rigid motion. It presents an experimental study focusing on three main aspects: speedup, resolving ambiguities due to local minima and accuracy. For this sake, we developed a method to minimize simultaneously the reprojected optical flow error...

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 ...