نتایج جستجو برای: self tuning filter

تعداد نتایج: 690412  

2008
Himanshu Joshi

In the present work, the frequency and quality factor (Q) variation of an evanescent-mode cavity resonator are predicted using analytical expressions, which give design variables for these structures. Two widely tunable narrowband evanescent-mode bandpass filters having 2.5% and 0.58% bandwidths are demonstrated, tuning from 2.7 to 4 GHz and 3 to 6 GHz respectively. A low loss Rogers Duroid® fl...

Journal: :Optics express 2011
J Vargas J Antonio Quiroga T Belenguer M Servín J C Estrada

A two-step self-tuning phase-shifting method is presented. The phase-step between the two interferograms is not known when the experiment is performed. Our demodulating method finds, in a robust way, this unknown phase-step. Once the phase-step is estimated we proceed to phase demodulate the interferograms. Moreover our method only requires the fringe patterns to have a constant unknown phase-s...

2013
Matthew Rhudy Yu Gu

Kalman filters provide an important technique for estimating the states of engineering systems. With several variations of nonlinear Kalman filters, there is a lack of guidelines for filter selection with respect to a specific research or engineering application. This creates a need for an in-depth discussion of the intricacies of different nonlinear Kalman filters. Particularly of interest for...

2012
Santanu Kumar Pradhan

This paper describes the design of a new self-tuning controller to control tip trajectory and tip deflection of a two-link flexible manipulator handling variable payloads based on nonlinear autoregressive with moving average and exogenous input (NARMAX) model. This proposed adaptive controller consists of a multivariate proportional integral and derivative (PID) feedback loop. The gains of the ...

Journal: :IEEE Trans. on Circuits and Systems 2007
Tien-Yu Lo Chung-Chih Hung

A Wide Tuning Range Gm-C Continuous-Time Analog Filter is a CMOS operation nal transconductance amplifier for low-power and wide tuning range filter application is proposed. The transconductor can work from the weak inversion region to the strong inversion region to maximize the transconductance tuning range. The trasconductance can be tuned by changing its bias current. A fifth-order Elliptic ...

2015
Saeed Ghamari Gabriele Tasselli Cyril Botteron Pierre-André Farine

A 4 th order Gm-C elliptic low-pass filter with a wide continuous tuning range is presented. The continuous tuning is achieved by means of a new tuning circuit which adjusts the bias current of the Gm cell’s input stage to control the cut-off frequency. With this tuning circuit, power efficiency is achieved by scaling down the power consumption proportionally to the cut-off frequency while keep...

Journal: :iranian journal of science and technology transactions of mechanical engineering 2015
h. beirami m. m. zerafat

a novel technique is investigated for pid controller adaptation in order to control thetemperature of a liquid-phase reactor tank by using a heat exchanger system. as for nonlinearity,time delay problems and model uncertainties introduced by the heat exchanger, an interval type-2fuzzy system (it2fs) is implemented to enhance and improve the total control performance.moreover, the fuzzy inferenc...

2001
Hengsheng Liu

A new automatic tuning scheme for continuous-time high-Q-bandpass filters is presented. It is conducted by amplitude comparison at three frequencies generated by an on-chip frequency synthesizer. Theoretical analysis and experimental results are provided. Analysis shows the tuning method is suitable for bandpass filters with 10. A m second-order filter is designed to demonstrate the proposed tu...

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