This paper aims at developing a force-guided microassembly technology with in-situ flexible polyvinylidene fluoride (PVDF) beam force sensing and hybrid force/position control based on an infinite dimensional model of the flexible sensor structure. Besides the designed 1-D PVDF cantilever based microforce sensor, as the soft sensor structure itself is installed at the free end of micromanipulat...

A mathematical model for the study of the behavior of a spatially distributed group of heterogeneous vehicles is introduced. We present a way to untangle the coupling between the assignment of any vehicle’s position and the assignment of all other vehicle positions by defining general sensing and moving conditions that guarantee that even when the vehicles’ motion and sensing are highly constra...

Conventionally, BLDC motors are commutated in six-step pattern with commutation controlled by position sensors. To reduce cost and complexity of the drive system, sensorless drive is preferred. The existing sensorless control scheme with the conventional back EMF sensing based on motor neutral voltage for BLDC has certain drawbacks, which limit its applications. This paper presents the dynamic ...

One of the greatest challenges for the emerging discipline of Augmented Reality (AR) is solving the visual registration problem i.e. aligning virtual computer graphics accurately over the real world scene to provide the user with a usefully “augmented” interactive experience. To achieve this goal the position and orientation of the user’s head must be measured with high accuracy and low latency...

Spectrum sensing plays a major role in the cognitive radio networks. An effective spectrum sensing has two fold utility: one hand it prevents primary users or licensed users for significant harmful interference from secondary users or unlicensed users and on the other hand it increases the spectral efficiency. In this paper, a survey of the various spectrum sensing schemes such as transmitter s...

In this paper, we first investigate and contrast the features of energy detection and cyclostationary feature detection for spectrum sensing. Combining the advantages of both, we propose an adaptive twostage sensing scheme which first performs spectrum sensing using an energy detector in cognitive and dynamic spectrum access networks. Then this scheme decides whether or not to implement cyclost...

Abstract This paper reviews the recent advances on high-performance distributed Brillouin optical fiber sensing, which include conventional sensing based backward stimulated scattering and two other novel mechanisms dynamic grating forward scattering, respectively. As for spatial resolution has been improved from meter to centimeter in time-domain scheme millimeter correlation-domain scheme, re...

Spectrum sensing in cognitive radio networks allows secondary users to sense the unused spectrum without causing interference to primary users. Cognitive radio requires more accurate sensing results from unused portions of the spectrum. Accurate spectrum sensing techniques can reduce the probability of false alarms and misdetection. In this paper, a two-stage spectrum sensing scheme is proposed...