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Main Research Topics:

  Repetitive control and its application

 

This topic involves designing a repetitive control system that can reject non-periodic disturbances. Repetitive control is a very useful strategy for tracking periodic reference inputs and rejecting periodic disturbances. However, a repetitive control system cannot readily reject non-periodic disturbances. We investigate the influence of non-periodic disturbances,  new approaches to disturbance estimation, and new design methods for repetitive control systems. Furthermore, we apply these methods to the construction of rotational control systems to boost their performance and precision.

  Application of advanced control theories

 

This topic involves developing advanced control techniques for practical use. We examine how to apply new control theories, for example, robust control, nonlinear control, intelligent control, etc., to mechatronic systems, such as an inverted pendulum, a magnetic levitation system and an arm robot.

  Expert control systems

 

This concerns the design of expert control systems for chemical processes. Chemical processes involve complex chemical reactions, and are difficult to describe precisely with mathematical models. So, conventional control methods, which are mainly based on manual operation and mathematical models, do not yield the desired control performance. We construct expert control systems that combine rule models and steady-state mathematical models in order to produce both a high-quality product and significant economic benefits.

  Motion control of acrobots

 

This topic involves designing optimal control laws for acrobots. Due to the complexity of the nonlinear dynamics and the nonholonomic behavior of an acrobot, it is very difficult to control its motion. We are trying to develop design methods for controlling an acrobot that do not need to divide the motion space into subspaces.

  Construction of an on-line control education system

 

This topic involves investigating how to use Internet experimental systems in an on-line course. Our goal is to develop an on-line control course, which employs Internet experimental systems, in conjunction with universities in China and Japan.

  j-Pinyin

 

This topic involves constructing an intelligent input support system  and a Japanese-Chinese/Chinese-Japanese dictionary for Chinese proper nouns. In Japan, there are no general rules for writing the pronunciation of Chinese proper nouns (the names of people/places, etc.). We have proposed a new Japanese kana notation, called j-pinyin, based on an international view point and taking into account the needs of the media. Future plans call for improvement of the j-pinyin system based on  experimental results and the construction of an input support system and dictionary.

List of Publications:

  Journal Articles
  International Conference Proceedings
  Proceedings
  Survey, Review and Books