The experimental validation of an efficient iterative technique for compensating known position errors in a spherical near to far-field transformation (NTFFT) for elongated antennas using a minimum ...

To meet the demands of ultra-precision positioning and scanning, a series of precision positioning mechanisms have been developed recently at Queensgate Instruments, which combines Queensgate’s ...

MACHINE FEED DRIVES that use ball screws that incorporate rotary encoders are prone to position measurement error as a result of thermally induced expansion because ...

Since the dawn of GPS, researchers have worked to improve the accuracy of estimated positioning, navigation and timing (PNT) from the receiver-derived pseudorange, carrier-phase and Doppler ...

Now more than ever, permanent magnets and electromagnets play a critical role in today’s advanced applications. From high-performance electric motors to magnetic nano-machines and high-reliability ...

In the field of automation, a motion control system consists of mechanical hardware coupled to a prime mover, the operation of which is governed by a computerized controller that compares the command ...