Seiichi Kawata - Academia.edu (original) (raw)

Papers by Seiichi Kawata

Journal of Japan Society on Water Environment, 2005

In the embedded mechatronic systems, 8-bit or 16-bit fixed-point microprocessors are used for con... more In the embedded mechatronic systems, 8-bit or 16-bit fixed-point microprocessors are used for control to meet the requirement of small size, low power consumption, and low cost. Since the rigidity of miniaturized and lightened mechanism becomes low, mechanical vibration occurs at the multiple modes. The vibrational modes are changed by the operational condition. Thus, it is necessary to estimate these vibrational modes in real-time to achieve the damping control. In this series of cooperative research, an adaptive observer based on the delta form was proposed. This paper examines the feasibility of the implementation of this observer to fixed-point microprocessors. As an illustration, first-order-systems are considered. In the case of 8 bit word length, overflow and underflow occurs in this calculation and the adaptive system becomes unstable. In the case of 16 bit word length, the proposed observer can follow the time-varying plant parameters in real-time. Simulation results show t...

We propose a new strategy for parallel reinforcement learning; using this strategy, the optimal v... more We propose a new strategy for parallel reinforcement learning; using this strategy, the optimal value function and policy can be constructed more quickly than by using traditional strategies. We define two types of agents: the main agent and the exploration-oriented agent. The main agent selects actions mainly for exploitation, and the exploration-oriented agent concentrates on exploration using the k-certainty exploration method. These agents learn in the same environment in parallel and update the shared value function alternately. By using this strategy, the construction of the optimal value function is expected, and the optimal actions can be selected by the main agents quickly. The experimental results of the n-armed bandit problems showed the availability of our method.

Transactions of the Society of Instrument and Control Engineers, 1992

Proceedings of the 37th SICE Annual Conference. International Session Papers

Transactions of the Institute of Systems, Control and Information Engineers, 1993

The Proceedings of Conference of Kanto Branch, 2006

The Proceedings of Conference of Kanto Branch, 2005

Transactions of the Japan Society of Mechanical Engineers Series C, 2009

6 − 6Asahigaoka， Hino − shi ， Tokye， 191 − 0065 Japan Recently， a new academic field ， " service ... more 6 − 6Asahigaoka， Hino − shi ， Tokye， 191 − 0065 Japan Recently， a new academic field ， " service engineering " has been very actively investigated ． However ， there are few effective software tools to sirnulate and evaluate services designed based on the concept of service engineering ． In the past， the authors proposed a service now simulation methQd using scene transition nets (STN)which is a graphi ⊂ mQdeling and simulation method f r discrete − continu us hybrid systern ． However ， this method cannot simUtate complex service fiows including customers ' decision − rnaking ． This method cannot simulate customers ' behaviors which are described as foll ws ： (ユ)How do customers behave when service providers give the 【 n a number of options in their service P (2)Do customers select designed services when there are seme competing services-It is essential to sirnulate abQve customers ' behaviors in order to evaluate designed services ． Nowadays ， it turned out that rnechanisrn of reinforcerrlent Iearning concerns behaviorar selections of custorners 、工n this paper ， the authors propose to develop decision − rnaking processes models of customers and to simu 【 ate customers ' behaviors and service flows by using reinforce 【 nent learning models and STN ． This paper shQws 亡 he usefulness of proposal simulation models by using some exampLes and describes the authQrs ' obseTvations about the experimental results ．

Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2014

Eighth IFAC Symposium on Advances in Control Education (2009), 2010

It is said that the number of engineers (expert IT, integration engineer, production engineer, an... more It is said that the number of engineers (expert IT, integration engineer, production engineer, and so on) in each field is insufficient in Japan. To aim at the high technology of Japan, the establishment of the efficient and effective promotion method of the engineer is demanded. The AIIT (Advanced Institute of Industrial Technology) provides a new education system that is able to satisfy this demand, that is the PBL (Project Based Learning) as engineer training system, and the AIIT has trained the professional engineer. The characteristics competencies defined by AIIT is a part of an important target in PBL. This paper describes the PBL and the competencies.

SICE Annual Conference 2007, 2007

2008 SICE Annual Conference, 2008

ABSTRACT

2014 IEEE International Conference on Industrial Technology (ICIT), 2014

In this paper, we propose an objective skill level evaluation method for Taijiquan. The proposed ... more In this paper, we propose an objective skill level evaluation method for Taijiquan. The proposed skill level evaluation method utilizes a logarithmic distribution diagram of curvature for spiral arm motion and a cross-correlation for whole body motion. In order to demonstrate a possibility of the proposed method, we present experimental results with a Kinect sensor.

IEEE Transactions on Automatic Control, 2006

In the present study, a sliding mode control design method based on the finite spectrum assignmen... more In the present study, a sliding mode control design method based on the finite spectrum assignment procedure is proposed. The finite spectrum assignment for retarded nonlinear systems can transform retarded nonlinear systems into delay-free linear systems via a variable transformation and a feedback, which contain the past values of the state. This method can be considered to be an extension of both the finite spectrum assignment for retarded linear systems with controllability over polynomial rings of the delay operator and the exact linearization for finite dimensional nonlinear systems. The proposed method is to design a sliding surface via the variable transformation used in the finite spectrum assignment and to derive a switching feedback law. The obtained surface contains not only the current values of the state variables but also the past values of the state variables in the original coordinates. The effectiveness of the proposed method is tested by an illustrative example.

Control Science and Technology for Development, 1986

It is clarified why one heat exchanger s hows various types of dynamics a nd what factors affect ... more It is clarified why one heat exchanger s hows various types of dynamics a nd what factors affect the dynamics of heat exchan ge r by int r od ucing the s patial weighting function. Es pecial l y, in one particular heat exchanger, it is found that the ratio of N.T.U. which is known to show the static behavior governs the dynamic behavior.

The Proceedings of Conference of Kanto Branch, 2006

Journal of Japan Society on Water Environment, 2005

In the embedded mechatronic systems, 8-bit or 16-bit fixed-point microprocessors are used for con... more In the embedded mechatronic systems, 8-bit or 16-bit fixed-point microprocessors are used for control to meet the requirement of small size, low power consumption, and low cost. Since the rigidity of miniaturized and lightened mechanism becomes low, mechanical vibration occurs at the multiple modes. The vibrational modes are changed by the operational condition. Thus, it is necessary to estimate these vibrational modes in real-time to achieve the damping control. In this series of cooperative research, an adaptive observer based on the delta form was proposed. This paper examines the feasibility of the implementation of this observer to fixed-point microprocessors. As an illustration, first-order-systems are considered. In the case of 8 bit word length, overflow and underflow occurs in this calculation and the adaptive system becomes unstable. In the case of 16 bit word length, the proposed observer can follow the time-varying plant parameters in real-time. Simulation results show t...

We propose a new strategy for parallel reinforcement learning; using this strategy, the optimal v... more We propose a new strategy for parallel reinforcement learning; using this strategy, the optimal value function and policy can be constructed more quickly than by using traditional strategies. We define two types of agents: the main agent and the exploration-oriented agent. The main agent selects actions mainly for exploitation, and the exploration-oriented agent concentrates on exploration using the k-certainty exploration method. These agents learn in the same environment in parallel and update the shared value function alternately. By using this strategy, the construction of the optimal value function is expected, and the optimal actions can be selected by the main agents quickly. The experimental results of the n-armed bandit problems showed the availability of our method.

Transactions of the Society of Instrument and Control Engineers, 1992

Proceedings of the 37th SICE Annual Conference. International Session Papers

Transactions of the Institute of Systems, Control and Information Engineers, 1993

The Proceedings of Conference of Kanto Branch, 2006

The Proceedings of Conference of Kanto Branch, 2005

Transactions of the Japan Society of Mechanical Engineers Series C, 2009

6 − 6Asahigaoka， Hino − shi ， Tokye， 191 − 0065 Japan Recently， a new academic field ， " service ... more 6 − 6Asahigaoka， Hino − shi ， Tokye， 191 − 0065 Japan Recently， a new academic field ， " service engineering " has been very actively investigated ． However ， there are few effective software tools to sirnulate and evaluate services designed based on the concept of service engineering ． In the past， the authors proposed a service now simulation methQd using scene transition nets (STN)which is a graphi ⊂ mQdeling and simulation method f r discrete − continu us hybrid systern ． However ， this method cannot simUtate complex service fiows including customers ' decision − rnaking ． This method cannot simulate customers ' behaviors which are described as foll ws ： (ユ)How do customers behave when service providers give the 【 n a number of options in their service P (2)Do customers select designed services when there are seme competing services-It is essential to sirnulate abQve customers ' behaviors in order to evaluate designed services ． Nowadays ， it turned out that rnechanisrn of reinforcerrlent Iearning concerns behaviorar selections of custorners 、工n this paper ， the authors propose to develop decision − rnaking processes models of customers and to simu 【 ate customers ' behaviors and service flows by using reinforce 【 nent learning models and STN ． This paper shQws 亡 he usefulness of proposal simulation models by using some exampLes and describes the authQrs ' obseTvations about the experimental results ．

Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2014

Eighth IFAC Symposium on Advances in Control Education (2009), 2010

It is said that the number of engineers (expert IT, integration engineer, production engineer, an... more It is said that the number of engineers (expert IT, integration engineer, production engineer, and so on) in each field is insufficient in Japan. To aim at the high technology of Japan, the establishment of the efficient and effective promotion method of the engineer is demanded. The AIIT (Advanced Institute of Industrial Technology) provides a new education system that is able to satisfy this demand, that is the PBL (Project Based Learning) as engineer training system, and the AIIT has trained the professional engineer. The characteristics competencies defined by AIIT is a part of an important target in PBL. This paper describes the PBL and the competencies.

SICE Annual Conference 2007, 2007

2008 SICE Annual Conference, 2008

ABSTRACT

2014 IEEE International Conference on Industrial Technology (ICIT), 2014

In this paper, we propose an objective skill level evaluation method for Taijiquan. The proposed ... more In this paper, we propose an objective skill level evaluation method for Taijiquan. The proposed skill level evaluation method utilizes a logarithmic distribution diagram of curvature for spiral arm motion and a cross-correlation for whole body motion. In order to demonstrate a possibility of the proposed method, we present experimental results with a Kinect sensor.

IEEE Transactions on Automatic Control, 2006

In the present study, a sliding mode control design method based on the finite spectrum assignmen... more In the present study, a sliding mode control design method based on the finite spectrum assignment procedure is proposed. The finite spectrum assignment for retarded nonlinear systems can transform retarded nonlinear systems into delay-free linear systems via a variable transformation and a feedback, which contain the past values of the state. This method can be considered to be an extension of both the finite spectrum assignment for retarded linear systems with controllability over polynomial rings of the delay operator and the exact linearization for finite dimensional nonlinear systems. The proposed method is to design a sliding surface via the variable transformation used in the finite spectrum assignment and to derive a switching feedback law. The obtained surface contains not only the current values of the state variables but also the past values of the state variables in the original coordinates. The effectiveness of the proposed method is tested by an illustrative example.

Control Science and Technology for Development, 1986

It is clarified why one heat exchanger s hows various types of dynamics a nd what factors affect ... more It is clarified why one heat exchanger s hows various types of dynamics a nd what factors affect the dynamics of heat exchan ge r by int r od ucing the s patial weighting function. Es pecial l y, in one particular heat exchanger, it is found that the ratio of N.T.U. which is known to show the static behavior governs the dynamic behavior.

The Proceedings of Conference of Kanto Branch, 2006