Abstract This paper compares a differential wheelspeed based dead reckoning system to a gyro based system for land navigation. Test results show that the gyro and wheelspeed-heading schemes perform equally well when modeling assumptions hold, such as when navigating smooth road surfaces. However, the wheelspeed-heading estimator’s position errors grow about twice as fast as the gyro based syste...

To meet the challenges of making low-cost MEMS yaw rate gyros for the precise self-localization of indoor mobile robots, this paper examines a practical and effective method of minimizing drift on the heading angle that relies solely on integration of rate signals from a gyro. The main idea of the proposed approach is consists of two parts; 1) self-identification of calibration coefficients tha...

In this study, we analyzed the swing motions of more experienced practitioner and new practitioner of iaido players by using tri-axial acceleration sensor and gyro sensor. Iaido is a modern Japanese martial art/sport. In this way, the acceleration and gyro sensor measurement enabled detailed motion information at the installation points to be displayed in a short time, thus making it possible t...

A comparative analysis between the fundamental and second cyclotron harmonics of gyrotron backward-wave oscillators (gyro-BWOs) is presented. The simulation results reveal that nonlinear field contraction is a common feature for both harmonic interactions. Besides, the electron transit angle, used to characterize the axial modes of the fundamental harmonic TE11 mode at the start-oscillation con...

A linear theory model is developed to analyze gyrotron traveling wave tubes ~gyro-TWT! employing nonuniform interaction structures, which can be tapered wall waveguide, severed tubes, or distributed lossy wall waveguides. Effects of the wall loss, reflections caused by the nonuniformity of the waveguide, and beam–wave interactions inside the sever region are incorporated in this theory. In addi...

In this paper we present an instrumentation system which integrates inertial motion sensing and mobile computing technologies to acquire sensory information during on-water rowing. The use of miniaturized piezoelectric gyros is proposed and tested to sense the oar rotation. By time-integrating the gyro output signal, the pitch angle, namely the angle the blade is away from perpendicular to the ...

A dedicated validation campaign (7 23 February 2000) was planned for the installation and qualification of the 1GP mode on ERS-2. In particular, the impact of this new configuration on the quality of ERS-2 SAR data and on ERS-2 SAR applications performance had to be carefully assessed in order to decide whether ERS-2 could be operationally left in 1GP mode. In order to characterise the response...

In this paper, the performance of a Ring Laser Gyro based inertial navigation is investigated. Dynamic and stochastic modeling are applied to gyro simulation and performance evaluation. In the dynamic model, some parameters such as scale factor and environmental sensitivity have been determined, whereas in the stochastic model, the other parameters such as random drift and measurement noise...