A passenger car equipped with continuously variable transmission (CVT) can steplessly change speed ratio according to road resistance during car driving. In the last decade, cars with CVT have rapidly increased in the world for smooth shifting without any uncomfortable shift shock, superb dynamic performance, low waste emission and good fuel economy. The paper establishes a dynamics model of a power train composed of engine-transmission-road. The integrated control of transmission-engine is investigated for improving a vehicle's fuel economy, dynamic performance, as well as vehicle speed controllability in terms of driver requirements.
{"title":"Research on integrated control strategy of CVT for passenger cars","authors":"Hongyan Wang, Yunshan Zhou, Boying Zhang, Xiding Qiu","doi":"10.1109/IVEC.1999.830715","DOIUrl":"https://doi.org/10.1109/IVEC.1999.830715","url":null,"abstract":"A passenger car equipped with continuously variable transmission (CVT) can steplessly change speed ratio according to road resistance during car driving. In the last decade, cars with CVT have rapidly increased in the world for smooth shifting without any uncomfortable shift shock, superb dynamic performance, low waste emission and good fuel economy. The paper establishes a dynamics model of a power train composed of engine-transmission-road. The integrated control of transmission-engine is investigated for improving a vehicle's fuel economy, dynamic performance, as well as vehicle speed controllability in terms of driver requirements.","PeriodicalId":191336,"journal":{"name":"Proceedings of the IEEE International Vehicle Electronics Conference (IVEC'99) (Cat. No.99EX257)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114258596","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 : 1999-09-06DOI: 10.1109/IVEC.1999.830678
Q. Qu, Jianwu Zhang, Yanzhu Liu
The optimal control laws of 4WS during single lane-change are studied using the driver model of the preview follower method based on a certain vehicle model. The actual vehicle models are considered as uncertain systems. The cornering stiffness of the front and rear wheels and outer disturbance vary over a limited range. An adaptative model-following variable structure control method is used for controlling the steering of front and rear wheels of the actual vehicle, so that the steering characteristics of an uncertain vehicle model can follow the characteristics of a reference model. Simulation results have demonstrated that the control system can overcome the drawbacks of parameter perturbations and outer disturbances.
{"title":"Variable structure model following control of active four-wheel-steering vehicle based on the optimal reference model","authors":"Q. Qu, Jianwu Zhang, Yanzhu Liu","doi":"10.1109/IVEC.1999.830678","DOIUrl":"https://doi.org/10.1109/IVEC.1999.830678","url":null,"abstract":"The optimal control laws of 4WS during single lane-change are studied using the driver model of the preview follower method based on a certain vehicle model. The actual vehicle models are considered as uncertain systems. The cornering stiffness of the front and rear wheels and outer disturbance vary over a limited range. An adaptative model-following variable structure control method is used for controlling the steering of front and rear wheels of the actual vehicle, so that the steering characteristics of an uncertain vehicle model can follow the characteristics of a reference model. Simulation results have demonstrated that the control system can overcome the drawbacks of parameter perturbations and outer disturbances.","PeriodicalId":191336,"journal":{"name":"Proceedings of the IEEE International Vehicle Electronics Conference (IVEC'99) (Cat. No.99EX257)","volume":"677 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134506396","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 : 1999-09-06DOI: 10.1109/IVEC.1999.830740
M. Sunwoo, Hansub Sim, Kangyune Lee
Liquefied petroleum gas (LPG) is a mixture of propane and butane gas, and LPG has been used worldwide in commercial light-duty vehicle fuel. LPG is one of the most promising alternative fuels for light-duty vehicles because it has higher octane number, lower maximum combustion temperature and lower CO and HC emissions than those of gasoline. In this study, a prototype electronic control unit (ECU) for an LPG engine with a bypass injector is developed and evaluated. Hardware and software of the ECU are designed for air-fuel ratio control of an LPG engine. The ECU is built using a Motorola MCU MC68HC05. In order to handle appropriate air-fuel ratio control, a modified PI control scheme is designed and implemented in the ECU. At low engine speed operation, it is difficult to meet the stoichiometric air-fuel ratio due to poor fuel feeding which is the nature of LPG engines. Furthermore during the idle operation, it is more difficult to maintain the stoichiometric air-fuel ratio because of the increase of cycle time delay and poor combustion condition. However during high engine speed operation, the variation of air-fuel ratio from the stoichiometric is substantially decreased, thus the emissions of its engine are reduced. Experimental results show that the prototype LPG ECU and its control scheme provide superior engine performance in terms of idle stability and emission reduction.
{"title":"Design and development of an ECU anti its air-fuel ratio control scheme for an LPG engine with a bypass injector","authors":"M. Sunwoo, Hansub Sim, Kangyune Lee","doi":"10.1109/IVEC.1999.830740","DOIUrl":"https://doi.org/10.1109/IVEC.1999.830740","url":null,"abstract":"Liquefied petroleum gas (LPG) is a mixture of propane and butane gas, and LPG has been used worldwide in commercial light-duty vehicle fuel. LPG is one of the most promising alternative fuels for light-duty vehicles because it has higher octane number, lower maximum combustion temperature and lower CO and HC emissions than those of gasoline. In this study, a prototype electronic control unit (ECU) for an LPG engine with a bypass injector is developed and evaluated. Hardware and software of the ECU are designed for air-fuel ratio control of an LPG engine. The ECU is built using a Motorola MCU MC68HC05. In order to handle appropriate air-fuel ratio control, a modified PI control scheme is designed and implemented in the ECU. At low engine speed operation, it is difficult to meet the stoichiometric air-fuel ratio due to poor fuel feeding which is the nature of LPG engines. Furthermore during the idle operation, it is more difficult to maintain the stoichiometric air-fuel ratio because of the increase of cycle time delay and poor combustion condition. However during high engine speed operation, the variation of air-fuel ratio from the stoichiometric is substantially decreased, thus the emissions of its engine are reduced. Experimental results show that the prototype LPG ECU and its control scheme provide superior engine performance in terms of idle stability and emission reduction.","PeriodicalId":191336,"journal":{"name":"Proceedings of the IEEE International Vehicle Electronics Conference (IVEC'99) (Cat. No.99EX257)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131283295","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 : 1999-09-06DOI: 10.1109/IVEC.1999.830618
F. Yu, Wei Sha, S. El-Demerdash
In designing a state observer for the suspension applications, the suitable selection of measurement signals is one of the important issues to achieve good estimation accuracy and meanwhile to ensure the system stability and also with the minimum sensor requirements. This paper investigates the estimation accuracy along with the robustness performance of a Kalman filter active vehicle suspension system and five different combinations of the measured states were compared. Simulations show the results of practical significance which will be useful for Kalman filter design in active vehicle suspension system.
{"title":"Estimation accuracy and robustness analysis of a state observer for an active vehicle suspension","authors":"F. Yu, Wei Sha, S. El-Demerdash","doi":"10.1109/IVEC.1999.830618","DOIUrl":"https://doi.org/10.1109/IVEC.1999.830618","url":null,"abstract":"In designing a state observer for the suspension applications, the suitable selection of measurement signals is one of the important issues to achieve good estimation accuracy and meanwhile to ensure the system stability and also with the minimum sensor requirements. This paper investigates the estimation accuracy along with the robustness performance of a Kalman filter active vehicle suspension system and five different combinations of the measured states were compared. Simulations show the results of practical significance which will be useful for Kalman filter design in active vehicle suspension system.","PeriodicalId":191336,"journal":{"name":"Proceedings of the IEEE International Vehicle Electronics Conference (IVEC'99) (Cat. No.99EX257)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134238012","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 : 1999-09-06DOI: 10.1109/IVEC.1999.830737
J. Takiguchi, H. Sugie, T. Ikeda, R. Yoshida, T. Kiyonaga, T. Hashizume
For pt.III see ibid., p.485-90 (1999). This paper presents a new method for outdoor navigation and autonomous loading. The system consists of an autonomous vehicle and signs. Signs indicating waypoints and next instructions are tracked and recognized one after another by using a vision system. Once the vehicle recognizes a "loading sign", the environmental map is generated from range data obtained by an area laser radar and is processed to make a local path to the pallet which satisfies kinematics constraints of a car-like 4 wheeled vehicle. The system is adaptable to the changeable environment because transportation paths can be easily changed by altering the contents or placement of the signs. Experimental results obtained in the outdoor environment show the validity and flexibility of the system.
{"title":"A study of autonomous mobile system in outdoor environment. IV. Sign instructed navigation and autonomous loading for outdoor transportation","authors":"J. Takiguchi, H. Sugie, T. Ikeda, R. Yoshida, T. Kiyonaga, T. Hashizume","doi":"10.1109/IVEC.1999.830737","DOIUrl":"https://doi.org/10.1109/IVEC.1999.830737","url":null,"abstract":"For pt.III see ibid., p.485-90 (1999). This paper presents a new method for outdoor navigation and autonomous loading. The system consists of an autonomous vehicle and signs. Signs indicating waypoints and next instructions are tracked and recognized one after another by using a vision system. Once the vehicle recognizes a \"loading sign\", the environmental map is generated from range data obtained by an area laser radar and is processed to make a local path to the pallet which satisfies kinematics constraints of a car-like 4 wheeled vehicle. The system is adaptable to the changeable environment because transportation paths can be easily changed by altering the contents or placement of the signs. Experimental results obtained in the outdoor environment show the validity and flexibility of the system.","PeriodicalId":191336,"journal":{"name":"Proceedings of the IEEE International Vehicle Electronics Conference (IVEC'99) (Cat. No.99EX257)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121337342","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 : 1999-09-06DOI: 10.1109/IVEC.1999.830677
Lu Qiang, Wang Huiyi, Guo Kong-hui
Vehicle dynamics are influenced by various nonlinear factors, such as tire characteristics, road conditions, etc. Hence, it is difficult to represent the vehicle dynamics by means of a two-degrees-of-freedom linear model perfectly. This paper presents a new four-wheel-steering (4WS) control system with a neural network that has the abilities of nonlinear modeling and control. A vehicle model of the RBF network is identified from the vehicle dynamics firstly. Next, the authors design a radial basis function (RBF) network controller with this vehicle model of the RBF network. The effectiveness of the proposed method is demonstrated with computer simulations.
{"title":"Identification and control of four-wheel-steering vehicles based on neural network","authors":"Lu Qiang, Wang Huiyi, Guo Kong-hui","doi":"10.1109/IVEC.1999.830677","DOIUrl":"https://doi.org/10.1109/IVEC.1999.830677","url":null,"abstract":"Vehicle dynamics are influenced by various nonlinear factors, such as tire characteristics, road conditions, etc. Hence, it is difficult to represent the vehicle dynamics by means of a two-degrees-of-freedom linear model perfectly. This paper presents a new four-wheel-steering (4WS) control system with a neural network that has the abilities of nonlinear modeling and control. A vehicle model of the RBF network is identified from the vehicle dynamics firstly. Next, the authors design a radial basis function (RBF) network controller with this vehicle model of the RBF network. The effectiveness of the proposed method is demonstrated with computer simulations.","PeriodicalId":191336,"journal":{"name":"Proceedings of the IEEE International Vehicle Electronics Conference (IVEC'99) (Cat. No.99EX257)","volume":"181 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121225626","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 : 1999-09-06DOI: 10.1109/IVEC.1999.830647
F. Gu, Jiyin Zhao, Yuliang Cong, Ying Zhang
In this paper, the authors introduce a new method for measuring the pressure vessel depth of the oil pump jet by indirectly measuring the dimension of the punch needle. The system is a type of photo-electronic-mechanic device, which includes an area matrix CCD image sensor, optical system, microprocessor unit and numerical control machine tools. This system can complete the high-speed data acquisition by two-port RAM technique, meanwhile the dynamic resolution of the measurement system is up to 1 /spl mu/m by data processing and modeling software.
{"title":"On-line measurement for the depth of the oil pump jet pressure vessel","authors":"F. Gu, Jiyin Zhao, Yuliang Cong, Ying Zhang","doi":"10.1109/IVEC.1999.830647","DOIUrl":"https://doi.org/10.1109/IVEC.1999.830647","url":null,"abstract":"In this paper, the authors introduce a new method for measuring the pressure vessel depth of the oil pump jet by indirectly measuring the dimension of the punch needle. The system is a type of photo-electronic-mechanic device, which includes an area matrix CCD image sensor, optical system, microprocessor unit and numerical control machine tools. This system can complete the high-speed data acquisition by two-port RAM technique, meanwhile the dynamic resolution of the measurement system is up to 1 /spl mu/m by data processing and modeling software.","PeriodicalId":191336,"journal":{"name":"Proceedings of the IEEE International Vehicle Electronics Conference (IVEC'99) (Cat. No.99EX257)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128370690","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 : 1999-09-06DOI: 10.1109/IVEC.1999.830725
Zheng Rongliang, Chen Xiaodong
The application of electronic technology on automotive wiring harness is a new field on automobile electronic technology. This paper introduces the multiplex system that consists of 89C2051 microprocessors. Through the serial communication between master and slave microprocessors, the master can send the switching signals to the slave. All the electrical devices are controlled by the slave. The multiplex system simplifies the traditional wiring harness and is beneficial to the development of automotive intelligence.
{"title":"Electronic automotive wiring harness","authors":"Zheng Rongliang, Chen Xiaodong","doi":"10.1109/IVEC.1999.830725","DOIUrl":"https://doi.org/10.1109/IVEC.1999.830725","url":null,"abstract":"The application of electronic technology on automotive wiring harness is a new field on automobile electronic technology. This paper introduces the multiplex system that consists of 89C2051 microprocessors. Through the serial communication between master and slave microprocessors, the master can send the switching signals to the slave. All the electrical devices are controlled by the slave. The multiplex system simplifies the traditional wiring harness and is beneficial to the development of automotive intelligence.","PeriodicalId":191336,"journal":{"name":"Proceedings of the IEEE International Vehicle Electronics Conference (IVEC'99) (Cat. No.99EX257)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128001101","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 : 1999-09-06DOI: 10.1109/IVEC.1999.830682
Yong Xu, Yan Zhao, Yiwen Liu, Hexin Chen
Having the advantage of high compression rate and simple decoding structure, vector quantization (VQ) plays an important role in various image compression methods. However, its high coding complexity makes the coding speed of the system very slow, and thus confines its application in image communication system. A fast image-coding method of VQ using TMS320C30 is presented in this paper. This method can efficiently improve the coding speed of the system.
{"title":"Fast image-coding method of VQ and its realization based on TMS320C30","authors":"Yong Xu, Yan Zhao, Yiwen Liu, Hexin Chen","doi":"10.1109/IVEC.1999.830682","DOIUrl":"https://doi.org/10.1109/IVEC.1999.830682","url":null,"abstract":"Having the advantage of high compression rate and simple decoding structure, vector quantization (VQ) plays an important role in various image compression methods. However, its high coding complexity makes the coding speed of the system very slow, and thus confines its application in image communication system. A fast image-coding method of VQ using TMS320C30 is presented in this paper. This method can efficiently improve the coding speed of the system.","PeriodicalId":191336,"journal":{"name":"Proceedings of the IEEE International Vehicle Electronics Conference (IVEC'99) (Cat. No.99EX257)","volume":"119 46","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120826242","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 : 1999-09-06DOI: 10.1109/IVEC.1999.830651
Zhou Zhen, W. Lijie, Guo Zhongwen, Guo Jianying
In the paper, life test data of humidity sensitive components were dealt with using a computer from the meaning of life distribution. The life distribution curve and the initial estimate of the corresponding parameters were also inferred. The influence of early failures on the life distribution for a sensor was emphasized and the reliability parameters were further estimated precisely according to the corresponding situation.
{"title":"The influence of the early failure on the life distribution of sensors","authors":"Zhou Zhen, W. Lijie, Guo Zhongwen, Guo Jianying","doi":"10.1109/IVEC.1999.830651","DOIUrl":"https://doi.org/10.1109/IVEC.1999.830651","url":null,"abstract":"In the paper, life test data of humidity sensitive components were dealt with using a computer from the meaning of life distribution. The life distribution curve and the initial estimate of the corresponding parameters were also inferred. The influence of early failures on the life distribution for a sensor was emphasized and the reliability parameters were further estimated precisely according to the corresponding situation.","PeriodicalId":191336,"journal":{"name":"Proceedings of the IEEE International Vehicle Electronics Conference (IVEC'99) (Cat. No.99EX257)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121438854","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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