In the last few years, several microwave filter design with band-pass response have been proposed for ultra-wideband (UWB) application. Among various microwave filter design, microstrip filter are mostly used by researcher due to their low profile, light weight, easy to fabricate and low cost. Conventional microstrip filter can be in any shape whether circular, rectangular or elliptical but som...

This paper presents a 2-link, 2-DOF flexible manipulator control using an inverse feedforward controller and adaptive notch filter with direct strain feedback controller. In the manipulator, transient residue vibrations inhibit full potential of manipulator. Vibrations caused by abrupt changes in direction links are referred to as vibrations, whereas residual occur when arm takes too long settl...

An ideal coronagraph with a band-limited image mask can efficiently image off-axis sources while removing identically all of the light from an on-axis source. However, strict mask construction tolerances limit the utility of this technique for directly imaging extrasolar terrestrial planets. We present a variation on the basic band-limited mask design—a family of “notch filter” masks—that mitig...

In this paper, a new online algorithm for updating equation error IIR ADF is proposed. The proposed algorithm, which involves maintaining a constant power of the desired signal, is independent of the white disturbance signal, and hence there is no bias in the coefficient's estimate of the ADF. We also provide the analysis and simulation results which verify this kind of performance. Application...

We offer a new series of image masks for coronagraphy that are insensitive to pointing errors and other low-spatial-frequency optical aberrations. For a modest cost in throughput, these “eighth-order” band-limited masks would allow the Terrestrial Planet Finder (TPF) to operate with a pointing accuracy no better than that of the Hubble Space Telescope. We also provide eighth-order notch filter ...

In a synchrotron, amplitude and phase noise in the radio-frequency (RF) system leads to timing jitter and energy fluctuations of the beam, which in turn cause orbital motion in dispersive regions. Electrical components in the RF system inevitably contain 60 Hz harmonic noise from the AC power grid. To suppress 60 Hz related noise, an adaptive notch filter was developed, implemented, and tested ...

We describe a new series of band-limited image masks for coronagraphy that are insensitive to pointing errors and other low-spatial-frequency optical aberrations. For a modest cost in throughput, these “eighth-order” masks would allow the Terrestrial Planet Finder Coronagraph (TPF-C) to operate with a pointing accuracy no better than that of the Hubble Space Telescope. We also provide eighth-or...

A popular method for measuring mass flows on combine harvesters is to register the induced force on a circular chute. Since this type of sensors are strongly subjected to wear and installed on difficult accessible places, it is important to know when the sensor provides wrong measurements without interrupting the process. In this study, a double, adaptive IIR notch filter is designed to track b...