Introduction: Recent years have witnessed intensive interest in and the rapid development of implementations of basic operations with optics thanks to the high potential to increase signal processing speed that is several orders of magnitude higher than that of digital electronics [1]. CMOS-compatible silicon based all-optical signal processing devices could be important basic building blocks, ...

A new technique to design an all-fiber temporal differentiator that has a large bandwidth and an arbitrary differentiation order is proposed and investigated. The proposed temporal differentiator is a special fiber Bragg grating (FBG) that is designed by controlling its magnitude and phase responses with the discrete layer peeling (DLP) method. There are three important features of this techniq...

In order to improve the tracking ability of vehicle mounted photoelectric platform, and make its system has characteristics rapid response, small overshoot, high-precision position tracking, strong anti-interference good robustness, this paper, a joint active disturbance rejection control (ADRC) sliding mode (SMC) method is proposed, which can effectively equipment. Firstly, mathematical model ...

This paper is an attempt to design a fractional order digital differentiator s where r is a real number, using indirect discretization scheme having very low absolute error and linear phase characteristics. Rational approximation of s is done in Laplace domain using continued fraction expansion(CFE), to discretize the approximated function (i.e s to z transformation) digital differentiator desi...

We experimentally demonstrate a terahertz-bandwidth photonic differentiator employing a silicon-on-insulator directional coupler. The integrated waveguide coupler with two identical paralleled strip waveguides achieves a first-order differentiator when full energy coupling is met from one waveguide to another. The integrated waveguide coupler can offer different operation bandwidths by changing...

New IIR digital differintegrators (differentiator and integrator) with very minor absolute relative errors are presented in this paper. The digital integrator is designed by interpolating some of the existing integrators. The optimum value of the interpolation ratio is obtained through linear programming optimization. Subsequently, by modifying the transfer function of the proposed integrator a...

This paper introduces in brief the traction system of a permanent magnet electrodynamic suspension (EDS) train. The synchronous traction mode based on long stators and track cable is described. A speed and position detection system is recommended. It is installed on board and is used as the feedback end. Restricted by the maglev train's structure, the permanent magnet electrodynamic suspension ...

Digital Differentiator is a vital signal processing tool. It is found in many applications, from low frequency biomedical equipment to high frequency radars. New developing fields such as touch screen tablets and online signature verification also has digital differentiators as basic building block. A approach is proposed to design approximately linear phase infinite-impulse-response (IIR) digi...