Yichun Yeh

Pipe inspection robot using a wireless communication system

Pipe lines of any material need to be inspected after a certain number of years. Therefore, it is necessary to develop a flexible pipe inspection robot using a wireless communication system. In this research, a wireless communication system is tested, and it is verified that the system can transmit image information steadily at a high speed. On the basis of this wireless communication system, a new pipe inspection robot for drain pipes is developed. With this new system, the movement of the robot can be controlled, defects or other problems inside a pipe can be inspected, and an image of the inside of the pipe can also be transmitted in real time.

Development of Bridge Diagnosis Technology by Independent Component Analysis

This paper focuses on maintaining a bridges safety by developing a daily management system. And the purpose of this study is the development of the health monitoring system. It supports the maintenance by independent component analysis (ICA) when there are some troubles in a bridge. The result of this study brings out the vibration behavior of the overall structure in a bridge. This vibration is caused by the external force such as heavy weight impact, wind pressure, and running vehicle. The character frequency was extracted from the analysis result using ICA and Spectral Analysis. When the vibration behavior caused by external force is very small in the bridge, ICA can detect the vibration response from the analysis result. Therefore, it is proved that the potential of detection was high by ICA

Development of optimal control system for safe distance of platooning using model predictive control

Platooning technology is becoming a future task which suggests as a way of reducing carbon dioxide emissions and realizing safe driving at a high velocity. This paper presents a unique optimal control method of velocity and distance for platooning using model predictive control. The vehicle-platoons distance model which is based on the road condition and weather condition is used in this rigorous approach of deriving the control input. A combination of Continuation and Generalized Minimum Residual Methods is used to optimize the sequence of vehicle control commands which is required in the prediction horizon aiming at minimizing the relative velocity and keeping safe distance of the vehicle-platoon while the vehicle-platoon is on a high velocity driving.

Model Development of Disposable Diapers Disposal Process

In the society with high environmental consciousness, development of new treatment techniques in used disposable diapers, which are currently mostly disposed by incineration, is needed. In this paper, a new treatment technique for decomposing disposable diapers by microorganisms with cryptomeria chips is proposed. In addition, a small size disposal system has ability to process steady like a garbage disposal unit is expected to develop. For that reason, the disposal process of disposable diapers is modeled, and the parameters of constructed process model are defined according to the results of experiment. Then a simulation with the parameters is performed used SIMULINK and Matlab

Development of Teaching Materials for SI Engine Control Exercise

Abstract With the problem of environmental pollution and energy depletion in recent years, a control technology which improves the performance of automobile engine is demanded. Therefore, there is a real need for cultivating human resources capable of understanding both the automobile engine and the control technology. This paper presents the development of teaching materials for Spark Ignition (SI) engine control exercise. The purpose of this work is for students to understand the engine characteristics and the actual engine control system using an engine simulator and hardware in the loop simulator (HILS). These teaching materials consist of a personal computer for designing control logic, a real-time arithmetic board, an experimental ECU, and an engine test bench. This work developed a simulation system in order to understand the engine characteristic of relation between the engine revolution, the ignition timing, and the throttle angel. Moreover, an engine starting control system of design base with ignition timing controller that changes the integral action parameter of PID controller is designed, and a real-time environment for engine is developed. The engine real-time simulation environment can load the designed control logic and the engine model into the real-time arithmetic board to run the real-time simulation and to confirm the characteristics of control parameters. In the future, when the engine simulator is connected with engine test bench and ECU, engine real-time simulation can be realized.

Temperature control of nonlinear system in a waste disposal process by selective control

With the advent of throw-away products, the final disposal of such products has become a problem to which considerable attention need be given. For example, the investigation in Japan in 2004 shows the fact that the quantity of production of the diaper increases from 3000 million in 2003 to 3,700 million in 2008. Therefore, in this paper, a new treatment technique for decomposing disposable diapers by microorganisms with cryptomeria chips is proposed. In addition, because a small size disposal system with a temperature controller is expected, the disposal processes of disposable diapers are modeled. The simulations with difference temperature conditions are performed using the models. And then, the relationship between temperature and decomposition rate become clear.