Fara Ashikin Ali

Study of the effect in the output membership function when tuning a Fuzzy Logic Controller

This paper describes a study of tuning process for fuzzy logic controller (FLC) design. In fuzzy logic controller design, there is no systematic procedure to tune fuzzy logic controller to follow a desired set point. The tuning process of Fuzzy Logic Controllers (FLCs) using trial-and-error approach is commonly done until satisfactory results are obtained. This is usually a tedious and time-consuming task but it has been widely employed and has been used in many successful industrial applications. The performance of the system can be analyzed. If the results are not as desired, changes are made either to the number of the fuzzy partitions or the mapping of the membership function and then the system can be tested again. This paper demonstrates a faster tuning process by adjusting the mapping of the membership function to get desired output. Through identifying and analyzing what will be done on adjusting mapping of membership functions by utilizing knowledge from the experts, it will be demonstrated in this paper that the tuning process of FLCs can be easily simplified.

Power quality analysis using frequency domain smooth-windowed Wigner-Ville distribution

Power quality has become a great concern to all electricity consumers. Poor power quality can cause equipment failure, data and economical losses. An automated monitoring system is needed to ensure signal quality, reduce diagnostic time and rectify failures. This paper presents the analysis of power quality signals using frequency domain smooth-windowed Wigner-Ville distribution (FDSWWVD). The power quality signals focused are swell, sag, interruption, harmonic, interharmonic and transient based on IEEE Std. 1159–2009. The TFD represents signal jointly in time-frequency representation (TFR) with good frequency and time resolution. Thus, it is very appropriate to analyze the signals that consist of multi-frequency components and magnitude variations. However, there is no fixed kernel of the TFD can be used to remove cross-terms for all types of signals. A set of performance measures is defined and used to compare the TFRs to identify and verify the TFD that operated at optimal kernel parameters. The result shows that FDSWWVD offers good performance of TFR and appropriate for power quality analysis.

Electrical interconnect test method of 3D ICs without boundary scan flip flops

An electrical interconnect test method and a testable design method are proposed of a 3D stacked ICs made of dies in which boundary scan flip flops are not embedded in this paper. Open defects occurring at interconnects between dies designed by the testable design method are detected by the test method. In order to examine feasibility of the electrical tests, a PCB circuit is tested by the test method made of a prototype IC designed by the testable design method. The experimental results show that a hard open defect and a resistive open one are able to be detected by the test method at a test speed of 500 kHz.

Performances evaluation and comparison of two algorithms for Fuzzy Logic rice cooking system (MATLAB Fuzzy Logic Toolbox and FuzzyTECH)

This paper presents an evaluation of performances rice cooking system with using Intelligent Controller that is Fuzzy Logic Controller (FLC) to meet the special requirements and some limitations of the rice cooking system. A new inference scheme is given to estimate the amount of rice and water to be used, and the temperature will be controlled according to the amount of rice and the time while cooking. The FLC system is designed by using two types of simulation software which are MATLAB Fuzzy Logic Toolbox and FuzzyTECH. The results obtained from the both simulation software are given in this paper. The differences the between both simulation also will be discussed. MATLAB Toolbox gives more specific results compared FuzzyTECH software. The both software meet the special requirements because is not much differ between each other.

Testability for resistive open defects by electrical interconnect test of 3D ICs without boundary scan flip flops

A three-dimensional integrated circuit is fabricated by stacking multiple dies. A resistive open defect may occur at interconnects between the dies by a void and a crack during fabrication process. We have proposed an electrical test method for an IC made of dies in which boundary scan flip flops are not embedded. In this paper, testability of the test method for resistive open defects is examined by Spice simulation. The results show that a resistive open defect whose resistance is greater than 150Ω is able to be detected at a test speed of 500kHz.

A testable design for electrical interconnect tests of 3D ICs

A testable design method for electrical testing is proposed in this paper to detect open defects occurring at interconnects between dies in a 3D IC and locate the defective interconnects. An IEEE 1149.1 test circuit is utilized to provide a test input vector to a targeted interconnect in the electrical tests. Feasibility of the electrical tests is evaluated by Spice simulation. It is shown by the experiments that a hard open defect and a resistive open defect can be detected at a test speed of 1GHz.

Oil and Gas Offshore Pipeline Leak Detection System: A Feasibility Study

Pipelines leaks normally begin at poor joints, corrosions and cracks, and slowly progress to a major leakage. Accidents, terror, sabotage, or theft are some of human factor of pipeline leak. The primary purpose of Pipeline leak detection systems (PLDS) is to assist pipeline operators in detecting and locating leaks earlier. PLDS systems provide an alarm and display other related data to the pipeline operators for their decision-making. It is also beneficial because PLDS can enhance their productivity by reduced downtime and inspection time. PLDS can be divided into internally based or computational modeling PLDS Systems and external hardware based PLDS. The purpose of this paper is to study the various types of leak detection systems based on internally systemtodefine a set of key criteria for evaluating the characteristics of this system and provide an evaluation method of leak detection technology as a guideline of choosing the appropriate system.

Object with symmetrical pattern recognition with dynamic size filter

This paper presents the implementation of object with symmetrical pattern recognition algorithm for 2D vision system of 3D vision-based multi sensor feedback system. This paper also discusses the dynamic size filter developed for this system. The inputs for this system are received from a couple of webcams which is not calibrated. The project objective is to assist a robot arm system using vision system for making decision during conducting an operation or task. The solutions need no camera calibration because the system has self-calibration effect since the area of interest had modelled using a set of algorithms by an array of visible features on it and not by it environment. This system is design for on-event processes and suitable for indoor environment applications with low time frame rate camera. One of the advantages of this project is that it only used a camera and image processing generated by the algorithms itself without additional sensor such as sonar or IR sensor.