A Fault Diagnosis System for Industry Pipe Manufacturing Process

It can be very costly for a process where an expert system and experience human being needed in certain circumstances. Without an expert system, his/her experience is loss where human is unavailable. This ‘human replacement’ process is certainly a convenient way to be applied. With the expert system, processes or tool that implemented will be standardized and accuracy will be increased comparing to the conventional way. Constrain values for the fault diagnoses are based on design data and experience of the engineer. A case study was conducted to verify the system. The development system helps user to find the best solution for the problems that occurred during the piping manufacturing process. The paper describes the used of expert system shell to develop piping fault diagnosis system in pipe manufacturing industries. The main aim of the research is to diagnose the problem of piping process in pipe manufacturing process

The Self-Reported Seat Discomfort Survey on Economy Class Aircraft Passenger in the Netherlands

The economy class aircraft passengers who experience long hour sitting during air travel has experienced significant body discomfort at neck, shoulder, lower back, upper leg and lower leg. The questionnaire was set out to study the relationship between different body back part discomfort and travel time of economy class aircraft passenger in order to rank the discomfort level for each body back part. There were one hundred and four anonymous self administered surveys were completed at Schiphol International Airport, the Netherlands. In line with the survey hypothesis, findings confirmed that the body discomfort of aircraft passenger after five hours travel is higher than after one hour travel. The body discomfort of economy class aircraft passenger is associated with flight duration. Further studies concerning how to best provide comfort to long haul economy class aircraft passengers are needed. The survey presented in this paper will beneficial the aircraft passenger seat designers to facilitate future design and evaluate seats that able to reduce body discomfort during long haul air travel

Total Design of Active Neck Support System for Economy Class Aircraft Seat

Travel by air with long hours will create discomfort feeling for aircraft passenger especially economy class aircraft passenger. Long hour air travel will create physiological stress on aircraft passenger. It may due to seat space limitation, noise, vibration, cabin humidity as well as seat comfort. Seat comfort is a subjective feeling that related to psychological aspect of aircraft passenger. The current aircraft passenger seat is equipped with a passive function where the passenger themselves needs to adjust the seat for comfort seating position. The aircraft passenger will not able to adjust the seat when the aircraft passenger is in the low activity condition. The active seat support system was developed to support the aircraft passenger actively. The first prototype of active seat support system is focus on neck section. The head position of the aircraft seat was embedded with the system to detect the head position of the passenger. During the development of the active seat support system, total design technique was used. Five conceptual designs were generated for selection. To determine the final design of active neck support system, the matrix evaluation method was used. The weight of the concept was obtained through weight analysis

The Self-Reported Seat Discomfort Survey on Economy Class Aircraft Passenger in the Netherlands

The economy class aircraft passengers who experience long hour sitting during air travel has experienced significant body discomfort at neck, shoulder, lower back, upper leg and lower leg. The questionnaire was set out to study the relationship between different body back part discomfort and travel time of economy class aircraft passenger in order to rank the discomfort level for each body back part. There were one hundred and four anonymous self administered surveys were completed at Schiphol International Airport, the Netherlands. In line with the survey hypothesis, findings confirmed that the body discomfort of aircraft passenger after five hours travel is higher than after one hour travel. The body discomfort of economy class aircraft passenger is associated with flight duration. Further studies concerning how to best provide comfort to long haul economy class aircraft passengers are needed. The survey presented in this paper will beneficial the aircraft passenger seat designers to facilitate future design and evaluate seats that able to reduce body discomfort during long haul air travel

Design of a Feature Recognition System for CAD/CAM Integration

This paper presents a methodology for implementing the feature recognition system for achieving the Computer Aided Design/ Computer Aided Manufacturing (CAD/CAM) integration goals. The Featurebased modeling is being used to model the solid models. The features being considered in this paper is hole form feature. The input of the feature recognition system is the Standard for the Exchange of Product Model Data (STEP) files. The set of feature recognition rules is generated by using ruled based technique

An Expert Carbide Cutting Tools Selection System for CNC Lathe Machine

The paper describes the application of an expert system to develop the carbide cutting tools selection system for computer numerical control (CNC) lathe machine. The aim of the development is to select the optimum tool holder, carbide cutting tools, insert, feed rate, and turning speed for CNC lathe machine. The system is able to select the suitable tips tool based on the dimension, machining parameters, feed rate, turning speed and materials of the work piece. The expert system shell was used to develop the system. Constrain values for the selection procedure is based on design database and international standard. A case study was conducted to verify the capability of the developed system. The developed system helps the manufacturing engineers and technicians to choose the right carbide tool and suitable turning speed for CNC lathe machine

Mechanical Structure Optimization of Sewerage Inspection Robot

The sewerage inspection robot is a distance controllable robot by a human operator during the sewerage pipe inspection operation. It travel on wheels and is composed of mechanism like a mobile robot. The concept of this inspection robot is used to inspect the sewerage pipe that is not accessible and hazardous for human. The sewerage inspection robot will detect and inform the defect location for any maintenance and repair works. The common problems in the sewerage pipe are breakage, crack and obstacles between the connections. The developed sewerage inspection robot needs to be designed to withstand the collapse of the sewerage pipe so that the robot is fit to be used for next jobs. The project presents the mechanical structure optimization of sewerage inspection robot. The robot is solid rectangular shape and a designed for sewerage pipe. The paper also focused on the structural analysis of the developed robot

Contaminants on Electrical Contacts Used in Semiconductor Device Testing

Electrical contacts used in semiconductor device testing are often deposited with a small pip of dark colour contaminants after being subjected to repeating cycles of impact loading. Samples of used electrical contacts are checked under SEM and EDX. It is discovered that the contaminants contain high percentage of tin elements. The reason as to why the contamination formed is investigated and it is found to be the result of material transfer from device lead. It is caused by the molten metal bridge formed when the contact begins to move apart

Water Pressure Loss Analysis of Mobile Machine for Fire Fighting Purpose

Fire fighting is risky profession. They are not only extinguishing fires in tall buildings but also must drag heavy hoses, climb high ladders and carry people from buildings and other situations. There are many fire fighters lost their lives in the line of duty each year throughout the world. The statistics of the fire fighter fatalities are still maintain at high level every year and it may continue to increase if there is no improvement in fire fighting techniques and technology. The paper describes the water pressure loss analysis of mobile fire fighting machine prototype

Mechanical Design and Analysis of All‐terrain Mobile Robot

This paper presents the conceptual mechanical analysis of the all-terrain mobile robot (AMoBo). The locomotion concept for all-terrain mobile robot is based on six independent motorized wheels. The mobile robot has a steering wheel in the front and the rear, and two wheels arranged on a bogie on each side. The front wheel has a spring suspension to guarantee optimal ground contact of all wheels at any time. The steering of the vehicle is realized by synchronizing the steering of the front and rear wheels and the speed difference of the bogie wheels. A prototype AMoBo was designed and fabricated. The developed prototype is about 66 cm in length and 23 cm in height. Testing size results show that the prototype able to overcome obstacles of same height as its wheel diameter and can climb stairs with step height of over 10 cm. Finite element analysis was used to analyse and verify the strength of each critical part of AMoBo. The base plate appeared to be the critical part with the highest shear stress and the lowest safety factor