Pub Date : 1995-07-26DOI: 10.1109/SICE.1995.526703
You-Sik Hong, Hyunsoo Jin, Chongkug Park
Traffic flows on intersection approaches can be obtained by using automatic counting machines. Nowadays many methods have been proposed for obtaining estimates of turning flows from traffic counts of which the most popular uses a loop detector at the traffic intersections. Measurements of queue length and vehicle delays are important to determine the optimal traffic cycle, but the conventional traffic signal system doesn't consider passenger car unit, offset, and saturation of upper road. So, 27-35% of estimated traffic cycle isn't matched to the observed traffic cycle. In this paper, we improve the vehicle waiting time at the traffic intersection and prevent spillback using fuzzy logic.
{"title":"Prevention of spillback using fuzzy control at the traffic intersection","authors":"You-Sik Hong, Hyunsoo Jin, Chongkug Park","doi":"10.1109/SICE.1995.526703","DOIUrl":"https://doi.org/10.1109/SICE.1995.526703","url":null,"abstract":"Traffic flows on intersection approaches can be obtained by using automatic counting machines. Nowadays many methods have been proposed for obtaining estimates of turning flows from traffic counts of which the most popular uses a loop detector at the traffic intersections. Measurements of queue length and vehicle delays are important to determine the optimal traffic cycle, but the conventional traffic signal system doesn't consider passenger car unit, offset, and saturation of upper road. So, 27-35% of estimated traffic cycle isn't matched to the observed traffic cycle. In this paper, we improve the vehicle waiting time at the traffic intersection and prevent spillback using fuzzy logic.","PeriodicalId":344374,"journal":{"name":"SICE '95. Proceedings of the 34th SICE Annual Conference. International Session Papers","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133181940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1995-07-26DOI: 10.1109/SICE.1995.526735
I. Whang, Jang-Gyu Lee
In this paper, an optimal filter for maneuvering target tracking in clutter environment is derived by combining measurement association hypotheses and target model transition hypotheses. The optimal filter is not realizable since it should consider exponentially increasing hypotheses. To reduce the hypotheses, a new hypotheses pruning technique is proposed. And then a realizable suboptimal filter is suggested. Simulation results show that the proposed filter produces smaller estimation errors and takes better track maintenance than the interacting multiple model probabilistic data association filter.
{"title":"Multiple hypotheses tracking for maneuvering targets in clutter environment","authors":"I. Whang, Jang-Gyu Lee","doi":"10.1109/SICE.1995.526735","DOIUrl":"https://doi.org/10.1109/SICE.1995.526735","url":null,"abstract":"In this paper, an optimal filter for maneuvering target tracking in clutter environment is derived by combining measurement association hypotheses and target model transition hypotheses. The optimal filter is not realizable since it should consider exponentially increasing hypotheses. To reduce the hypotheses, a new hypotheses pruning technique is proposed. And then a realizable suboptimal filter is suggested. Simulation results show that the proposed filter produces smaller estimation errors and takes better track maintenance than the interacting multiple model probabilistic data association filter.","PeriodicalId":344374,"journal":{"name":"SICE '95. Proceedings of the 34th SICE Annual Conference. International Session Papers","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133805646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1995-07-26DOI: 10.1109/SICE.1995.526715
T. Watanabe, K. Yasuda, R. Yokohama
In this paper, a model reduction method for linear time invariant stable system whose poles locate in a specified disk on the complex left half plane is considered. In this reduction method the domain in which the poles of the original system locate is preserved. This method is based on the balanced truncation technique that is often used for reducing high order stable system by a low order stable one. A lot of properties of the balanced truncation technique are maintained. Furthermore, the error bound is evaluated using Hankel singular values of the original system.
{"title":"Balanced truncation preserving poles in a specified disk","authors":"T. Watanabe, K. Yasuda, R. Yokohama","doi":"10.1109/SICE.1995.526715","DOIUrl":"https://doi.org/10.1109/SICE.1995.526715","url":null,"abstract":"In this paper, a model reduction method for linear time invariant stable system whose poles locate in a specified disk on the complex left half plane is considered. In this reduction method the domain in which the poles of the original system locate is preserved. This method is based on the balanced truncation technique that is often used for reducing high order stable system by a low order stable one. A lot of properties of the balanced truncation technique are maintained. Furthermore, the error bound is evaluated using Hankel singular values of the original system.","PeriodicalId":344374,"journal":{"name":"SICE '95. Proceedings of the 34th SICE Annual Conference. International Session Papers","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124562027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1995-07-26DOI: 10.1109/SICE.1995.526713
Gao Liqun, Jin Yuanwei, Zhang Siying
In this paper, the problem of structural control is introduced. The problem is discussed concretely for linear systems with quadratic cost functions, and methods to design the optimal control structure and /spl epsi/-optimal control structure are obtained.
{"title":"The research on structural control of LQ systems","authors":"Gao Liqun, Jin Yuanwei, Zhang Siying","doi":"10.1109/SICE.1995.526713","DOIUrl":"https://doi.org/10.1109/SICE.1995.526713","url":null,"abstract":"In this paper, the problem of structural control is introduced. The problem is discussed concretely for linear systems with quadratic cost functions, and methods to design the optimal control structure and /spl epsi/-optimal control structure are obtained.","PeriodicalId":344374,"journal":{"name":"SICE '95. Proceedings of the 34th SICE Annual Conference. International Session Papers","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124645931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1995-07-26DOI: 10.1109/SICE.1995.526705
R. Shimamune, K. Tanifuji
The application of oil-hydraulic actuators for active suspension of railway vehicles has been examined experimentally by using a 3-DOF half-vehicle model. The LQG control law was adopted, in which state variables were estimated from measurable ones on the actual railway vehicle. The results show the possibility that the controllable frequency range extends with the oil-hydraulic actuator. The addition of bogie acceleration measurement to body related measurement provides a significant advantage for the performance. When actual body weight becomes lighter than that of the controller design value, the control performance and the stability deteriorate. Therefore, it is recommended to use the empty car body weight for design of the active suspension controller. The control effect can reach to the maximum vibration isolation level by shortening the sampling period to 2 ms.
{"title":"Application of oil-hydraulic actuator for active suspension of railway vehicle: experimental study","authors":"R. Shimamune, K. Tanifuji","doi":"10.1109/SICE.1995.526705","DOIUrl":"https://doi.org/10.1109/SICE.1995.526705","url":null,"abstract":"The application of oil-hydraulic actuators for active suspension of railway vehicles has been examined experimentally by using a 3-DOF half-vehicle model. The LQG control law was adopted, in which state variables were estimated from measurable ones on the actual railway vehicle. The results show the possibility that the controllable frequency range extends with the oil-hydraulic actuator. The addition of bogie acceleration measurement to body related measurement provides a significant advantage for the performance. When actual body weight becomes lighter than that of the controller design value, the control performance and the stability deteriorate. Therefore, it is recommended to use the empty car body weight for design of the active suspension controller. The control effect can reach to the maximum vibration isolation level by shortening the sampling period to 2 ms.","PeriodicalId":344374,"journal":{"name":"SICE '95. Proceedings of the 34th SICE Annual Conference. International Session Papers","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128424663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1995-07-26DOI: 10.1109/SICE.1995.526730
Y. Nam, B. Lee, N. Ko
This paper proposes a new motion planning method of a mobile robot avoiding moving obstacles. We use an artificial potential field method and the view-time concept. The view-time is defined as the period between one sampling time to the next. It is assumed that the position and the velocity of obstacles are monitored at each sampling time. From the position and velocity at sampling time, we calculate the probability density of the obstacle trajectory for a view-time, based on the assumption that the obstacle motion is being modeled as a random walk process. The probability that the position can be swept by an obstacle during a view-time is calculated from the probability density function of the obstacle trajectory. Then artificial potential is assigned at every position by considering the probability of obstacle trajectory. The force induced by the artificial potential field repels the robot away from the probable obstacle trajectory. This method is a look ahead scheme and is effective for moving obstacle avoidance.
{"title":"A view-time based potential field method for moving obstacle avoidance","authors":"Y. Nam, B. Lee, N. Ko","doi":"10.1109/SICE.1995.526730","DOIUrl":"https://doi.org/10.1109/SICE.1995.526730","url":null,"abstract":"This paper proposes a new motion planning method of a mobile robot avoiding moving obstacles. We use an artificial potential field method and the view-time concept. The view-time is defined as the period between one sampling time to the next. It is assumed that the position and the velocity of obstacles are monitored at each sampling time. From the position and velocity at sampling time, we calculate the probability density of the obstacle trajectory for a view-time, based on the assumption that the obstacle motion is being modeled as a random walk process. The probability that the position can be swept by an obstacle during a view-time is calculated from the probability density function of the obstacle trajectory. Then artificial potential is assigned at every position by considering the probability of obstacle trajectory. The force induced by the artificial potential field repels the robot away from the probable obstacle trajectory. This method is a look ahead scheme and is effective for moving obstacle avoidance.","PeriodicalId":344374,"journal":{"name":"SICE '95. Proceedings of the 34th SICE Annual Conference. International Session Papers","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129367522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1995-07-26DOI: 10.1109/SICE.1995.526700
T. Mitamura, A. Ohuchi
The field of computer-supported cooperative work (CSCW) focuses on the role of computer technology in group work. CSCW examines how people work together in groups and how computer technology can support them. FISM (flexible interpretive structural modeling), developed by the author, is a method to develop structural models of complex systems. In this paper, we propose the method of idea generation based on FISM/fuzzy: fuzzy flexible interpretive structural modeling. FISM/fuzzy is a fuzzy version of FISM. Some theoretical results which enable logical and efficient modeling are derived. The process of idea generation by FISM/fuzzy is called the FISM/fuzzy session.
{"title":"Idea generation supporting system based on FISM/fuzzy","authors":"T. Mitamura, A. Ohuchi","doi":"10.1109/SICE.1995.526700","DOIUrl":"https://doi.org/10.1109/SICE.1995.526700","url":null,"abstract":"The field of computer-supported cooperative work (CSCW) focuses on the role of computer technology in group work. CSCW examines how people work together in groups and how computer technology can support them. FISM (flexible interpretive structural modeling), developed by the author, is a method to develop structural models of complex systems. In this paper, we propose the method of idea generation based on FISM/fuzzy: fuzzy flexible interpretive structural modeling. FISM/fuzzy is a fuzzy version of FISM. Some theoretical results which enable logical and efficient modeling are derived. The process of idea generation by FISM/fuzzy is called the FISM/fuzzy session.","PeriodicalId":344374,"journal":{"name":"SICE '95. Proceedings of the 34th SICE Annual Conference. International Session Papers","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114202123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1995-07-26DOI: 10.1109/SICE.1995.526726
Y. Kosuge, H. Kameda
A new method for maneuvering target tracking in a dense environment is presented. This is an extension and improvement of the conventional joint probabilistic data association. The maneuver acceleration is assumed to be limited to a time invariant set of discrete values and switched values according to the Markov process. In this method, the maneuver of a target increases the prediction covariance as compared with that obtained by standard Kalman filter equations, and so, the validation gate size varies automatically with the maneuver of the target. The performance of this method is evaluated in terms of tracking success rates by computer simulation.
{"title":"Evaluation of tracking filter performance for maneuvering targets in dense environment","authors":"Y. Kosuge, H. Kameda","doi":"10.1109/SICE.1995.526726","DOIUrl":"https://doi.org/10.1109/SICE.1995.526726","url":null,"abstract":"A new method for maneuvering target tracking in a dense environment is presented. This is an extension and improvement of the conventional joint probabilistic data association. The maneuver acceleration is assumed to be limited to a time invariant set of discrete values and switched values according to the Markov process. In this method, the maneuver of a target increases the prediction covariance as compared with that obtained by standard Kalman filter equations, and so, the validation gate size varies automatically with the maneuver of the target. The performance of this method is evaluated in terms of tracking success rates by computer simulation.","PeriodicalId":344374,"journal":{"name":"SICE '95. Proceedings of the 34th SICE Annual Conference. International Session Papers","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121792275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1995-07-26DOI: 10.1109/SICE.1995.526979
S. Endo, A. Ohuchi
"Version space" proposed by Mitchell (1977) is a typical method of the concept learning from training examples, but this method has some points which can be improved. The purpose of this paper is to construct a flexible learning mechanism which can be applied to the critical points. To do this, the method of concept learning based on genetic algorithm is proposed. The important features of the algorithm are as follows: 1) the system is able to learn the target concept formed by a disjunctive normal form; and 2) if there are some incorrect examples in training examples set, the algorithm will reduce them and generate a correct target concept. This function is called "noise reduction". Finally, the algorithm is able to learn the target concept from a positive example set. Especially, we note the third feature that is the ability of learning from positive examples.
{"title":"Genetic based concept learning from positive examples","authors":"S. Endo, A. Ohuchi","doi":"10.1109/SICE.1995.526979","DOIUrl":"https://doi.org/10.1109/SICE.1995.526979","url":null,"abstract":"\"Version space\" proposed by Mitchell (1977) is a typical method of the concept learning from training examples, but this method has some points which can be improved. The purpose of this paper is to construct a flexible learning mechanism which can be applied to the critical points. To do this, the method of concept learning based on genetic algorithm is proposed. The important features of the algorithm are as follows: 1) the system is able to learn the target concept formed by a disjunctive normal form; and 2) if there are some incorrect examples in training examples set, the algorithm will reduce them and generate a correct target concept. This function is called \"noise reduction\". Finally, the algorithm is able to learn the target concept from a positive example set. Especially, we note the third feature that is the ability of learning from positive examples.","PeriodicalId":344374,"journal":{"name":"SICE '95. Proceedings of the 34th SICE Annual Conference. International Session Papers","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116726998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1995-07-26DOI: 10.1109/SICE.1995.526724
H. Hirayama, N. Kawai, S. Gotoh, H. Ojima, K. Yoshii, Y. Fukuyama
System analysis was applied to the fibrinolysis system by plasmin. The behaviors of plasminogen activating factor, activating enzyme, plasmin, plasminogen, plasmin substrate, reacted products and intermediate products are expressed by rate equations. The temporal changes in the concentrations of components in the system are consistent to physiological observation. Because plasminogen and plasmin substrate exist in sufficient amount, the system is reduced to a linear one. Fibrinolysis system is unstable and insensitive to changes in rate constants while it is controllable. The most critical process is producing the activating enzyme and the free plasmin. The optimized feedback control converged the impulse responses of free plasmin and reacted product. Present study is available to evaluate functional and quantitative aspects of the system.
{"title":"System engineering analysis of fibrinolysis by plasmin: transient behaviors and linear properties","authors":"H. Hirayama, N. Kawai, S. Gotoh, H. Ojima, K. Yoshii, Y. Fukuyama","doi":"10.1109/SICE.1995.526724","DOIUrl":"https://doi.org/10.1109/SICE.1995.526724","url":null,"abstract":"System analysis was applied to the fibrinolysis system by plasmin. The behaviors of plasminogen activating factor, activating enzyme, plasmin, plasminogen, plasmin substrate, reacted products and intermediate products are expressed by rate equations. The temporal changes in the concentrations of components in the system are consistent to physiological observation. Because plasminogen and plasmin substrate exist in sufficient amount, the system is reduced to a linear one. Fibrinolysis system is unstable and insensitive to changes in rate constants while it is controllable. The most critical process is producing the activating enzyme and the free plasmin. The optimized feedback control converged the impulse responses of free plasmin and reacted product. Present study is available to evaluate functional and quantitative aspects of the system.","PeriodicalId":344374,"journal":{"name":"SICE '95. Proceedings of the 34th SICE Annual Conference. International Session Papers","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125290192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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