Low-pass and high-pass non-integer shelving filter designs, which are suitable for acoustic applications, presented in this work. A first design is based on a standard fractional-order bilinear transfer function, while second one the transposition of integer-order function into its power-law counterpart. Both functions approximated using Oustaloup approximation tool, implementation case filters performed through employment concept driving-point impedance synthesis. An attractive benefit...

The Cole–Davidson function is an efficient tool for describing the tissue behavior, but conventional methods of approximation are not applicable due form this function. In order to overcome problem, a novel scheme approximating function, based on utilization curve fitting procedure offered by MATLAB software, introduced in work. derived rational transfer implemented using Cauer and Foster RC networks. As application example, impedance model membrane mesophyll cells realized, with simulation...

A simple and direct procedure for implementing fractional-order filters with transfer functions that contain Laplace operators of different fractional orders is presented in this work. Based on a general function describes low-pass, high-pass, band-pass, band-stop all-pass filters, the introduced concept deals consideration as whole, its approximation being performed using curve-fitting-based technique. Compared to conventional procedure, where each operator individually approximated, main...

A generalized structure that is capable of implementing power-law filters derived from 1st and 2nd-order mother filter functions presented in this work. This achieved thanks to the employment Operational Transconductance Amplifiers (OTAs) as active elements, because electronic tuning capability their transconductance parameter. Appropriate design examples are provided performance introduced evaluated through simulation results using Cadence Integrated Circuits (IC) suite Metal Oxide...

A structure suitable for implementing power-law low-pass and high-pass filter transfer functions is presented in this work. Through the utilization of a field-programmable analog array device, full programmability characteristics intermediate stages, as required realizing rational integer-order function that approximates corresponding function, was achieved, making versatile. In addition, comparison between fractional-order filters regarding effect non-integer order performed. The design...

An alternative procedure for the implementation of fractional-order compensators is presented in this work. The employment a curve-fitting-based approximation technique compensator transfer function offers improved accuracy compared to Oustaloup and Padé methods. As design example, lead intended usage car suspension systems realized. open-loop closed-loop behavior system evaluated by post-layout simulation results obtained using Cadence IC suite Metal Oxide Semiconductor (MOS) transistor...

A fractional-order proportional-derivative (PD) controller implementation for a position servo system is presented in this paper. The main offered attractive benefit the employment of only one second-generation current conveyor (CCII) as active element, minimizing component count comparison to conventional way where three CCIIs are required purpose. behavior evaluated using Cadence software and MOS transistor models provided by 0.35μm Austria Mikro Systeme CMOS process.

This paper deals with a fractional-order DC motor controller implementation, which is constructed from operational transconductance amplifiers and capacitors. In addition, for the electronic tuning capability potential of implementation in monolithic form, proposed structure offers significant reduction active components count. achieved through manipulation transfer function integrator such way that only differentiation stage required. An illustrative simulation example above mentioned...

This paper deals with fractional-order controller implementations, which can be constructed by electronically controlled building blocks fully integrated on a single chip. The proposed DC motor structure offers 50% reduction of the active components count, compared to corresponding already published counterpart. liquid level two-interacting-tank scheme is first one in literature offering aforementioned features. Simulation results, based 0.35 μ m Austria Mikro Systeme technology process,...

The fractional-order lung impedance model of the human respiratory tree is implemented in this paper, using Operational Transconductance Amplifiers. employment such active element offers electronic adjustment characteristics terms both elements values and orders. As MOS transistors OTAs are biased weak inversion region, power dissipation dc bias voltage operation also minimized. In addition, partial fraction expansion tool has been utilized, order to achieve reduction spread required...

Summary Double‐exponent fractional‐order impedance functions are important for modeling a wide range of biochemical materials and biological tissues. Through appropriate selection the two exponents (fractional orders), well‐known Havriliak–Negami, Cole–Cole, Cole–Davidson, Debye relaxation models can be obtained as special cases. Here we show that an integer‐order Padé‐based approximation Havriliak–Negami function is possible to obtain realized using appropriately configured Cauer/Foster...

A power-law compensator scheme for achieving robust frequency compensation in control systems including plants with an uncertain pole, is introduced this work. This achieved through appropriate selection of the parameters, which guarantee that Nyquist diagram open-loop system compensator-plant crosses a fixed point independent plant pole variations. The implementation fractional-order performed utilization curve-fitting-based technique and derived rational integer-order transfer function...

We show that the four parameters of a single-dispersion Cole-Cole bio-impedance model can be extracted from an one time-domain measurement with fixed frequency. In particular, periodic triangle waveform current excitation signal is injected into biological sample under study while measuring voltage developed across this in galvanostatic setup. The response due to triangle-wave firstly analytically derived closed form. After Flower Pollination optimization Algorithm (FPA) applied extract...