A class of dual loop networked control systems with different sampling rate is discussed in this paper. Generally, Smith predictor can be used to overcome the influence of network delay. However, influence of prediction model inaccuracy, different sampling rate and interference always appear in the actual systems, and the systems based on conventional Smith predictor cannot achieve the desired control effect. The gain adaptive Smith predictor is proposed for this class of networked control systems, which can be used to overcome the problems caused by inaccurate prediction model, interference and various sampling rate. The simulation results based on MATLAB show that the proposed method is efficient and feasible.
{"title":"Design of Dual Loop Networked Control Systems with Different Sampling Rate Based on Gain Adaptive Smith Predictor","authors":"Hong Zhao, Ke Che","doi":"10.1145/3305275.3305333","DOIUrl":"https://doi.org/10.1145/3305275.3305333","url":null,"abstract":"A class of dual loop networked control systems with different sampling rate is discussed in this paper. Generally, Smith predictor can be used to overcome the influence of network delay. However, influence of prediction model inaccuracy, different sampling rate and interference always appear in the actual systems, and the systems based on conventional Smith predictor cannot achieve the desired control effect. The gain adaptive Smith predictor is proposed for this class of networked control systems, which can be used to overcome the problems caused by inaccurate prediction model, interference and various sampling rate. The simulation results based on MATLAB show that the proposed method is efficient and feasible.","PeriodicalId":370976,"journal":{"name":"Proceedings of the International Symposium on Big Data and Artificial Intelligence","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134138523","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}
Remote smart devices and cloud platforms have been widely used in the field of smart homes in recent years. This paper proposes a remote Wi-Fi intelligent switch based on cloud platform for the energy waste and safety hazard caused by long-term standby of household traditional switch. The hardware platform is built based on STC89C52RC and ESP8266, and the terminal device is established by using socket server. The communication process with the cloud platform, the APP and the Windows client are written and built, and finally the function of the terminal device to upload data to the cloud platform and the cloud platform to send control commands to the terminal device is realized.
{"title":"Remote Wi-Fi Smart Switch Based on Cloud Platform","authors":"Yong Liang, Wei Lu, Peilin Guo, Zheng Zhou, Tianci Zhang","doi":"10.1145/3305275.3305325","DOIUrl":"https://doi.org/10.1145/3305275.3305325","url":null,"abstract":"Remote smart devices and cloud platforms have been widely used in the field of smart homes in recent years. This paper proposes a remote Wi-Fi intelligent switch based on cloud platform for the energy waste and safety hazard caused by long-term standby of household traditional switch. The hardware platform is built based on STC89C52RC and ESP8266, and the terminal device is established by using socket server. The communication process with the cloud platform, the APP and the Windows client are written and built, and finally the function of the terminal device to upload data to the cloud platform and the cloud platform to send control commands to the terminal device is realized.","PeriodicalId":370976,"journal":{"name":"Proceedings of the International Symposium on Big Data and Artificial Intelligence","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133102460","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}
With the wide application of mobile Internet, location-based service demands are more and more extensive. In the indoor positioning technology, the location fingerprinting method based on WIFI is widely used because of its strong anti-interference ability, high positioning accuracy, long transmission distance and convenient use. The paper adopts the location fingerprint matching and localization algorithm. Firstly, the Gaussian filtering algorithm is applied to process the original data collected by WIFI, and a complete fingerprint database is built off line. Then, the WKNN algorithm is used for position matching to realize indoor position online positioning. The experimental results show that the positioning algorithm used has a significant improvement in positioning accuracy compared with the traditional position fingerprint algorithm.
{"title":"Research on Indoor Location Algorithm Based on WIFI","authors":"Gui-hua Yang, Shiming Fu","doi":"10.1145/3305275.3305306","DOIUrl":"https://doi.org/10.1145/3305275.3305306","url":null,"abstract":"With the wide application of mobile Internet, location-based service demands are more and more extensive. In the indoor positioning technology, the location fingerprinting method based on WIFI is widely used because of its strong anti-interference ability, high positioning accuracy, long transmission distance and convenient use. The paper adopts the location fingerprint matching and localization algorithm. Firstly, the Gaussian filtering algorithm is applied to process the original data collected by WIFI, and a complete fingerprint database is built off line. Then, the WKNN algorithm is used for position matching to realize indoor position online positioning. The experimental results show that the positioning algorithm used has a significant improvement in positioning accuracy compared with the traditional position fingerprint algorithm.","PeriodicalId":370976,"journal":{"name":"Proceedings of the International Symposium on Big Data and Artificial Intelligence","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122362656","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}
Through analyzing the technological features of the SONY the camera shell, an injection mold was designed with the help of software Creo. Secondly, the structural analysis was carried out for the main molds, and the best parting surface was found out, and the design of the sprue bushing, positioning ring, shunting channel and cold material hole were explained. Finally, Moldflow software was used to complete network division and network repair, and the best gate location, filling time, filling pressure, filling temperature were determined. The flow front temperature and cavitation position were analyzed. The results show that the product design is optimized, the production efficiency and the product quality were improved.
{"title":"Design and Optimization of Injection Mold for Camera Shell Based on Mold Flow Analysis","authors":"Langping Zhang, Junle Lei, X. Dai","doi":"10.1145/3305275.3305316","DOIUrl":"https://doi.org/10.1145/3305275.3305316","url":null,"abstract":"Through analyzing the technological features of the SONY the camera shell, an injection mold was designed with the help of software Creo. Secondly, the structural analysis was carried out for the main molds, and the best parting surface was found out, and the design of the sprue bushing, positioning ring, shunting channel and cold material hole were explained. Finally, Moldflow software was used to complete network division and network repair, and the best gate location, filling time, filling pressure, filling temperature were determined. The flow front temperature and cavitation position were analyzed. The results show that the product design is optimized, the production efficiency and the product quality were improved.","PeriodicalId":370976,"journal":{"name":"Proceedings of the International Symposium on Big Data and Artificial Intelligence","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125518394","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}
With the continuous integration of information technology and financial services, the status of Internet payment in the financial system has been increasing year by year, and the research on its acceptance behavior has gradually attracted attention from all walks of life. In the context of the "Internet", the development of network technology has made mobile payments also considered by consumers to be included in offline payments. On the basis of previous studies, the paper analyzes and summarizes 10 factors influencing consumers' choice of offline mobile payment. Taking students and office workers as examples, the technology acceptance model is used to verify and analyze hypotheses. The results of the study show that perceived risk does not have consumer perceived usefulness, perceived risk, subjective normative questions, perceived ease of use, questions about consumer innovation, willingness to use, and experience of heart flow. Questions such as questions about the use behavior, questions about self-image, and questions about self-efficacy have a positive effect on the willingness to use. The results of the study were analyzed and corresponding recommendations were made.
{"title":"Research on Factors Affecting Consumers' Offline Mobile Payment","authors":"Jingming Zhang","doi":"10.1145/3305275.3305294","DOIUrl":"https://doi.org/10.1145/3305275.3305294","url":null,"abstract":"With the continuous integration of information technology and financial services, the status of Internet payment in the financial system has been increasing year by year, and the research on its acceptance behavior has gradually attracted attention from all walks of life. In the context of the \"Internet\", the development of network technology has made mobile payments also considered by consumers to be included in offline payments. On the basis of previous studies, the paper analyzes and summarizes 10 factors influencing consumers' choice of offline mobile payment. Taking students and office workers as examples, the technology acceptance model is used to verify and analyze hypotheses. The results of the study show that perceived risk does not have consumer perceived usefulness, perceived risk, subjective normative questions, perceived ease of use, questions about consumer innovation, willingness to use, and experience of heart flow. Questions such as questions about the use behavior, questions about self-image, and questions about self-efficacy have a positive effect on the willingness to use. The results of the study were analyzed and corresponding recommendations were made.","PeriodicalId":370976,"journal":{"name":"Proceedings of the International Symposium on Big Data and Artificial Intelligence","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129410816","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}
At present, many PH value measuring instruments on the market have many problems, for example, the measurement accuracy is not high enough, the circuit wiring is too complicated, and the stability is not strong. Therefore, in order to improve the measurement accuracy of the detector, reduce the effect of temperature on the pH measurement of the solution, simplify the circuit layout, and enhance the stability of the measurement circuit, Developed a STC89C52 microcontroller as the core processor, using Raycore E-201-CPH composite electrode to collect analog voltage signal and transfer it to A/D converter to convert into digital signal after amplified by op amp, and input it into the single-chip microcomputer together with the digital signal collected by the temperature sensor. Finally, after processing by the SCM, it is transmitted to the LCD1602 liquid crystal display module, showing the measured pH value and temperature value. The whole design is made down, and after many debugging, it can be concluded that the PH detector can accurately detect the PH value of the solution. It also has the characteristics of cheaper, affordable, high precision, good stability, simple circuit, simple operation and so on, which is suitable for the needs of most of the current users.
{"title":"Design and Realization of Portable Water Quality PH Detector","authors":"Shengqiang Liu, Tianci Zhang, Xuan Sun","doi":"10.1145/3305275.3305304","DOIUrl":"https://doi.org/10.1145/3305275.3305304","url":null,"abstract":"At present, many PH value measuring instruments on the market have many problems, for example, the measurement accuracy is not high enough, the circuit wiring is too complicated, and the stability is not strong. Therefore, in order to improve the measurement accuracy of the detector, reduce the effect of temperature on the pH measurement of the solution, simplify the circuit layout, and enhance the stability of the measurement circuit, Developed a STC89C52 microcontroller as the core processor, using Raycore E-201-CPH composite electrode to collect analog voltage signal and transfer it to A/D converter to convert into digital signal after amplified by op amp, and input it into the single-chip microcomputer together with the digital signal collected by the temperature sensor. Finally, after processing by the SCM, it is transmitted to the LCD1602 liquid crystal display module, showing the measured pH value and temperature value. The whole design is made down, and after many debugging, it can be concluded that the PH detector can accurately detect the PH value of the solution. It also has the characteristics of cheaper, affordable, high precision, good stability, simple circuit, simple operation and so on, which is suitable for the needs of most of the current users.","PeriodicalId":370976,"journal":{"name":"Proceedings of the International Symposium on Big Data and Artificial Intelligence","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124535991","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}
In order to save material and reduce energy consumption, the three-dimensional modeling of the limit device of the pneumatic equipment behind the engineering tire is carried out by using Solidworks, and the finite element static analysis is carried out in ANSYS Workbench to determine that the structural strength and stiffness have a greater margin. Based on the results of static finite element analysis, a lightweight design of the limit device is carried out by topology optimization and parameter optimization. Finally, it is verified that the optimized structure of the limit device meets the requirements of its strength and stiffness. Through the lightweight design of the limit device, the overall structure quality of the device is reduced by 10.835 kg, and the reduction is 45.3%. The goal of lightweight design is realized.
{"title":"Lightweight design of limit device for engineering tire shaping inflator based on ANSYS Workbench","authors":"Jingbo Cong, Yiwei Liu, Z. Shen","doi":"10.1145/3305275.3305289","DOIUrl":"https://doi.org/10.1145/3305275.3305289","url":null,"abstract":"In order to save material and reduce energy consumption, the three-dimensional modeling of the limit device of the pneumatic equipment behind the engineering tire is carried out by using Solidworks, and the finite element static analysis is carried out in ANSYS Workbench to determine that the structural strength and stiffness have a greater margin. Based on the results of static finite element analysis, a lightweight design of the limit device is carried out by topology optimization and parameter optimization. Finally, it is verified that the optimized structure of the limit device meets the requirements of its strength and stiffness. Through the lightweight design of the limit device, the overall structure quality of the device is reduced by 10.835 kg, and the reduction is 45.3%. The goal of lightweight design is realized.","PeriodicalId":370976,"journal":{"name":"Proceedings of the International Symposium on Big Data and Artificial Intelligence","volume":"131 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133027028","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}
Aiming at the lightweight design of traction machine shell of a butterfly motor, the finite element simplified model of traction machine shell is established. The static analysis of traction machine shell is made with ANSYS Workbench. Based on the static stress cloud chart, topology optimization is carried out with taking the unit density as design variable and the lightest model weight as the optimization objective under the stiffness constraint. The model of traction machine shell is reconstructed with the back nested honeycomb structure. The lightweight design of traction machine shell of a butterfly motor shows that the proposed method can meet the mechanical properties and effectively reduce the weight of traction machine shell, providing a feasible solution for the lightweight design of complex structure for additive manufacturing.
{"title":"Lightweight 3D printing traction machine shell nesting cellular topology optimization technology","authors":"Qingpeng Chen, Jiwen Chen, Yanhua Zhao, Chen Wang, Xian Chen","doi":"10.1145/3305275.3305343","DOIUrl":"https://doi.org/10.1145/3305275.3305343","url":null,"abstract":"Aiming at the lightweight design of traction machine shell of a butterfly motor, the finite element simplified model of traction machine shell is established. The static analysis of traction machine shell is made with ANSYS Workbench. Based on the static stress cloud chart, topology optimization is carried out with taking the unit density as design variable and the lightest model weight as the optimization objective under the stiffness constraint. The model of traction machine shell is reconstructed with the back nested honeycomb structure. The lightweight design of traction machine shell of a butterfly motor shows that the proposed method can meet the mechanical properties and effectively reduce the weight of traction machine shell, providing a feasible solution for the lightweight design of complex structure for additive manufacturing.","PeriodicalId":370976,"journal":{"name":"Proceedings of the International Symposium on Big Data and Artificial Intelligence","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131189808","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}
In chemical industry, metallurgy, petroleum and other industrial production processes, due to the existence of time delay, it is easy to cause the control quality of the control system to deteriorate or even become unstable. In this paper, the common equipment in the industrial process control system - heat exchanger as the controlled object, to study the control algorithm of systems with long time delay. We discuss the conventional PID control algorithm and the control algorithm based on Smith predictive control. The Matlab software is used to simulate the controlled object. The results show that compared with the conventional PID control, Smith predictive control effectively reduces the overshoot and adjustment time of the system and improves the response speed of the system, but it is only suitable for occasions with high control precision. Gain-adaptive smith predictive control still has a good control effect in the case of changed gain. The system of modified Smith predictive with regulator responds quickly and maintains good control performance in the case of changed time delay.
{"title":"Research on control algorithms of systems with long time delay","authors":"Mingxia Chen, Jin-di Zhao, Hong Zhao","doi":"10.1145/3305275.3305305","DOIUrl":"https://doi.org/10.1145/3305275.3305305","url":null,"abstract":"In chemical industry, metallurgy, petroleum and other industrial production processes, due to the existence of time delay, it is easy to cause the control quality of the control system to deteriorate or even become unstable. In this paper, the common equipment in the industrial process control system - heat exchanger as the controlled object, to study the control algorithm of systems with long time delay. We discuss the conventional PID control algorithm and the control algorithm based on Smith predictive control. The Matlab software is used to simulate the controlled object. The results show that compared with the conventional PID control, Smith predictive control effectively reduces the overshoot and adjustment time of the system and improves the response speed of the system, but it is only suitable for occasions with high control precision. Gain-adaptive smith predictive control still has a good control effect in the case of changed gain. The system of modified Smith predictive with regulator responds quickly and maintains good control performance in the case of changed time delay.","PeriodicalId":370976,"journal":{"name":"Proceedings of the International Symposium on Big Data and Artificial Intelligence","volume":"57 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131424453","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}
Permanent magnet synchronous motor (PMSM) is widely used in electric vehicle power systems due to their high torque inertia ratio and high power density. However, the strong coupling of winding phase current and torque affects their control accuracy. In this paper, the drive and control of PMSM were studied according to the characteristics of electric vehicle operating conditions. Based on the traditional motor vector control, the control strategy of PMSM was analyzed in detail, and a permanent magnet synchronous motor drive and control system for electric vehicle was designed. The system uses the STM32F407VET6 chip as the controller and six power field effect transistors as the inverter driver, the precise control of the PMSM was realized. This research can provide reference for the design and analysis of the PMSM drive and control system for electric vehicles.
{"title":"Design of Electric Vehicle Motor Drive and Control System Based on PMSM","authors":"Lieping Zhang, Zhenyu Yang, Yanlin Yu, Wei Wang","doi":"10.1145/3305275.3305313","DOIUrl":"https://doi.org/10.1145/3305275.3305313","url":null,"abstract":"Permanent magnet synchronous motor (PMSM) is widely used in electric vehicle power systems due to their high torque inertia ratio and high power density. However, the strong coupling of winding phase current and torque affects their control accuracy. In this paper, the drive and control of PMSM were studied according to the characteristics of electric vehicle operating conditions. Based on the traditional motor vector control, the control strategy of PMSM was analyzed in detail, and a permanent magnet synchronous motor drive and control system for electric vehicle was designed. The system uses the STM32F407VET6 chip as the controller and six power field effect transistors as the inverter driver, the precise control of the PMSM was realized. This research can provide reference for the design and analysis of the PMSM drive and control system for electric vehicles.","PeriodicalId":370976,"journal":{"name":"Proceedings of the International Symposium on Big Data and Artificial Intelligence","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123314792","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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