Modelling the performance of single-input–single-output (SISO) processes using transfer function and fuzzy logic

OPSEARCH ◽  
2020 ◽  
Vol 57 (3) ◽  
pp. 815-836
Author(s):  
Chidozie Chukwuemeka Nwobi-Okoye
Keyword(s):  
Fuzzy Logic ◽  
Transfer Function ◽  
Single Input Single Output ◽  
Single Output ◽  
Single Input

Searching for Robust Minimal-Order Compensators

1999 ◽  
Vol 123 (2) ◽  
pp. 233-236 ◽  
Author(s):  
Qian Wang ◽  
Robert F. Stengel
Keyword(s):  
Transfer Function ◽  
Design Procedure ◽  
Minimal Order ◽  
Single Input Single Output ◽  
Single Output ◽  
Parameter Variations ◽  
Single Input ◽  
Monte Carlo Evaluation ◽  
And Performance ◽  
Algorithm Search

A method of designing a family of robust compensators for a single-input/single-output linear system is presented. Each compensator’s transfer function is found by using a genetic-algorithm search for numerator and denominator coefficients. The search minimizes the probabilities of unsatisfactory stability and performance subject to real parameter variations of the plant. As the search progresses, probabilities are estimated by Monte Carlo evaluation. The design procedure employs a sweep from the lowest feasible transfer-function order to higher order, terminating either when design goals have been achieved or when no further improvement in robustness is evident. The method provides a means for estimating the best possible compensation of a given order based on repeated searches.

Robust non-destructive inspection of composite aerospace structures by extraction of ultrasonic guided-wave transfer function in single-input dual-output scanning systems

2020 ◽  
Vol 31 (5) ◽  
pp. 651-664 ◽  
Author(s):  
Margherita Capriotti ◽  
Francesco Lanza di Scalea
Keyword(s):  
Transfer Function ◽  
Guided Wave ◽  
Single Input Single Output ◽  
Aircraft Fuselage ◽  
Single Output ◽  
Ultrasonic Guided Wave ◽  
Single Input ◽  
Non Destructive ◽  
Scanning Systems

Ultrasonic guided-wave testing is widely utilized for damage detection in plate-like structural components, including composite aircraft fuselage and wing panels. Many guided-wave tests involve transducer scanning to cover finite areas, a task that is most effectively performed by non-contact wave transduction means. The most common guided-wave test implementation consists of a “single-input single-output” scheme. The single-input single-output scheme leads to a transfer function that is convolved with the particular frequency response of the transducers and that of the transducer-to-structure paths (in both excitation and detection). These responses can be unknown or generally variable, especially in non-contact scanning systems and impact excitations. This article proposes a “single-input dual-output” scheme for ultrasonic guided-wave testing in scanning systems that is based on a deconvolution operation. The single-input dual-output scheme better isolates the structural transfer function that is the only property affected by the presence of possible damage. The single-input dual-output scheme was applied to two guided-wave scanning systems under development to detect impact-type damage in stiffened skin-to-stringer panels representative of modern composite aircraft construction. The results demonstrate the dual-output technique and also shed some light on the role of the different frequency bands for the detection of damage at different locations of the skin-to-stringer assembly.

Design and Implementation of a Fuzzy Logic Controller for Two Wheeled Self Balancing Robot

2011 ◽  
Vol 403-408 ◽  
pp. 4918-4925
Author(s):  
Umar Farooq ◽  
Muhammad Usman Asad ◽  
Athar Hanif ◽  
K.M. Hasan ◽  
Muhammad Amar
Keyword(s):  
Fuzzy Logic ◽  
Tilt Angle ◽  
Fuzzy Logic Controller ◽  
Low Cost ◽  
Single Input Single Output ◽  
Output Controller ◽  
Design And Implementation ◽  
Single Output ◽  
Single Input ◽  
Balancing Robot

This paper describes the design of a simple fuzzy logic controller for self balancing robot. The proposed controller is single input, single output controller. The input to the controller is tilt angle and the output forms the speed commands for the motors. The controller is designed using MATLAB and implemented with a low cost readily available AT89C52 microcontroller. Results have proved the validity of the proposed controller for balancing the robot.

Comparative analysis of SISO and wavelength diversity-based FSO systems at different transmitter power levels

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Varun Srivastava ◽  
Abhilash Mandloi ◽  
Dhiraj Kumar Patel
Keyword(s):  
Optical Signal ◽  
Free Space Optical ◽  
Optical Source ◽  
Transmit Power ◽  
Single Input Single Output ◽  
Transmitter Power ◽  
Single Output ◽  
Communication Links ◽  
Single Input ◽  
Matching Performance

AbstractFree space optical (FSO) communication refers to a line of sight technology, which comprises optical source and detector to create a link without the use of physical connections. Similar to other wireless communication links, these are severely affected by losses that emerged due to atmospheric turbulence and lead to deteriorated intensity of the optical signal at the receiver. This impairment can be compensated easily by enhancing the transmitter power. However, increasing the transmitter power has some limitations as per radiation regulations. The requirement of high transmit power can be reduced by employing diversity methods. This paper presents, a wavelength-based diversity method with equal gain combining receiver, an effective technique to provide matching performance to single input single output at a comparatively low transmit power.

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