Pub Date : 2005-07-10DOI: 10.1109/ICMECH.2005.1529297
Yen-Hsun Wu, Han-Pang Huang
The task of global vision module is to extract meaningful data for the strategy decision module. According to these data, the decision-making module estimates the field condition, and then plans strategies to offense or defense. The data extracted should be reliable and accurate for strategy decision module so as to plan efficient tactics. Robust color classification plays a dramatic role in analyzing the scene based on pre-defined color classes. In addition, appropriate color classification can reduce the computational time and improve the reliability of extracted data by eliminating the uninterested background information. In this paper, principal component analysis (PCA) is adopted to seek for a color subspace. In this color space, a color classification model can be constructed straightforward. By using this model, colors slightly varied can be robustly classified.
{"title":"Robust color classification for global soccer vision","authors":"Yen-Hsun Wu, Han-Pang Huang","doi":"10.1109/ICMECH.2005.1529297","DOIUrl":"https://doi.org/10.1109/ICMECH.2005.1529297","url":null,"abstract":"The task of global vision module is to extract meaningful data for the strategy decision module. According to these data, the decision-making module estimates the field condition, and then plans strategies to offense or defense. The data extracted should be reliable and accurate for strategy decision module so as to plan efficient tactics. Robust color classification plays a dramatic role in analyzing the scene based on pre-defined color classes. In addition, appropriate color classification can reduce the computational time and improve the reliability of extracted data by eliminating the uninterested background information. In this paper, principal component analysis (PCA) is adopted to seek for a color subspace. In this color space, a color classification model can be constructed straightforward. By using this model, colors slightly varied can be robustly classified.","PeriodicalId":175701,"journal":{"name":"IEEE International Conference on Mechatronics, 2005. ICM '05.","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116230974","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 : 2005-07-10DOI: 10.1109/ICMECH.2005.1529278
Hai-Chu Chen, Man-tian Li, Li-ning Sun
A high precise mobile positioning microrobot is designed in this paper. The microrobot has macro and micro driving modes. The macro driving mode uses two smoovy motors to drive the microrobot quickly moving on a desktop in a huge range and accomplishing the first precise positioning in millimeter scale with wheels. The micro driving mode, using PZT stacks as micro driving elements and with the help of electromagnets, working on the inch-worm driving principle, can drive the microrobot moving in a small range and accomplishing the second high precise positioning in micron or nanometer scale. In order to switch the macro and micro driving modes, a torque motor driving a feed screw nut mechanics is applied. In order to enhance the flexible of the microrobot, batteries, driving circuits and wireless communication and others are all integrated in the microrobot. At last, an experimental system is built up by using global CCD camera and local microscopes as measuring equipments and then a micro gear assembly experiment is done by the microrobot.
{"title":"A high precise mobile positioning microrobot with macro/micro drivers","authors":"Hai-Chu Chen, Man-tian Li, Li-ning Sun","doi":"10.1109/ICMECH.2005.1529278","DOIUrl":"https://doi.org/10.1109/ICMECH.2005.1529278","url":null,"abstract":"A high precise mobile positioning microrobot is designed in this paper. The microrobot has macro and micro driving modes. The macro driving mode uses two smoovy motors to drive the microrobot quickly moving on a desktop in a huge range and accomplishing the first precise positioning in millimeter scale with wheels. The micro driving mode, using PZT stacks as micro driving elements and with the help of electromagnets, working on the inch-worm driving principle, can drive the microrobot moving in a small range and accomplishing the second high precise positioning in micron or nanometer scale. In order to switch the macro and micro driving modes, a torque motor driving a feed screw nut mechanics is applied. In order to enhance the flexible of the microrobot, batteries, driving circuits and wireless communication and others are all integrated in the microrobot. At last, an experimental system is built up by using global CCD camera and local microscopes as measuring equipments and then a micro gear assembly experiment is done by the microrobot.","PeriodicalId":175701,"journal":{"name":"IEEE International Conference on Mechatronics, 2005. ICM '05.","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122146100","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 : 2005-07-10DOI: 10.1109/ICMECH.2005.1529344
P. Lan, Man-shing Liu, N. Lu, Qingyong Ding
A novel 3-DOF high speed and high precision manipulator, which combines direct driven planar parallel mechanism and linear actuator, is introduced. Through adding some constraints, workspace with well kinematics performance can be generated, and the optimization of geometric parameter is carried out in terms of a new performance index composed of speed and dexterity. Design study then is carried out in the software ADAMS environment to analyze the approximate design sensitivity of the variable; that is, the effects of parameter of each beam cross sectional area and relative position of linear actuator on model performance. Several conclusions are then drawn on the appropriate way of dynamics optimization to get a lightweight and small deformation manipulator. Dynamics simulation of an improved planar parallel mechanism with different cross section and another unrefined one are compared. The stiffness of them is almost equal, but the mass of the improved one decreases 30 percent compared with the initial one. That means this way of optimization is efficient
{"title":"Optimal design of a novel high speed and high precision 3-DOF manipulator","authors":"P. Lan, Man-shing Liu, N. Lu, Qingyong Ding","doi":"10.1109/ICMECH.2005.1529344","DOIUrl":"https://doi.org/10.1109/ICMECH.2005.1529344","url":null,"abstract":"A novel 3-DOF high speed and high precision manipulator, which combines direct driven planar parallel mechanism and linear actuator, is introduced. Through adding some constraints, workspace with well kinematics performance can be generated, and the optimization of geometric parameter is carried out in terms of a new performance index composed of speed and dexterity. Design study then is carried out in the software ADAMS environment to analyze the approximate design sensitivity of the variable; that is, the effects of parameter of each beam cross sectional area and relative position of linear actuator on model performance. Several conclusions are then drawn on the appropriate way of dynamics optimization to get a lightweight and small deformation manipulator. Dynamics simulation of an improved planar parallel mechanism with different cross section and another unrefined one are compared. The stiffness of them is almost equal, but the mass of the improved one decreases 30 percent compared with the initial one. That means this way of optimization is efficient","PeriodicalId":175701,"journal":{"name":"IEEE International Conference on Mechatronics, 2005. ICM '05.","volume":"68 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125378720","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 : 2005-07-10DOI: 10.1109/ICMECH.2005.1529378
S. Fu, C. Cheng
In this paper, we developed a direct adaptive control framework for MIMO nonlinear uncertain systems with matched exogenous disturbances, which are confined to admissible classes and characterized unmodeled dynamics and uncertain nonlinearities. We emphasize that the frameworks are Lyapunov-based and the proposed controllers address adaptive stabilization. Furthermore, factored adaptive gain matrices are obtained when extended to linear systems. Finally, the proposed framework is applied to a numerical example for demonstration.
{"title":"Direct adaptive control designs for nonlinear discrete-time systems with matched uncertainties","authors":"S. Fu, C. Cheng","doi":"10.1109/ICMECH.2005.1529378","DOIUrl":"https://doi.org/10.1109/ICMECH.2005.1529378","url":null,"abstract":"In this paper, we developed a direct adaptive control framework for MIMO nonlinear uncertain systems with matched exogenous disturbances, which are confined to admissible classes and characterized unmodeled dynamics and uncertain nonlinearities. We emphasize that the frameworks are Lyapunov-based and the proposed controllers address adaptive stabilization. Furthermore, factored adaptive gain matrices are obtained when extended to linear systems. Finally, the proposed framework is applied to a numerical example for demonstration.","PeriodicalId":175701,"journal":{"name":"IEEE International Conference on Mechatronics, 2005. ICM '05.","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126350955","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 : 2005-07-10DOI: 10.1109/ICMECH.2005.1529393
R. Luo, T. Hsu, K. Su
We have developed an intelligent multi sensor-based security robot system that can detect abnormal and hazardous situation and notify us. The security robot is constructed using an aluminum frame. The contour of the robot is cylindrical. The diameter is about 50 cm, and height is 150 cm. The function of the security robot contains six parts, including software development system; obstacle avoidance and motion planning system, image system, sensor system, remote supervisory system and other systems. In the sensor system, we use multisensor integration algorithm. Then we also present the remote mobile security system (RMS) for the security robot. We use touch panel to display system state, and design a general user interface (GUI) on the security robot. We demonstrate the remote supervisory system to control the security robot using direct control mode and behavior control mode. We design a new recharging station for the security robot. It moves by X axis and rotates by Z axis, and guards the security robot easily to connect using sensor based method. Finally, we implement security function using the security robot to detect fire event and intruder. The security robot can transmit the message of the detection result to the cellular phone using GSM modem, and transmits the detection result to the client computer through Internet.
{"title":"The development of a multisensor based intelligent security robot: Chung Cheng #1","authors":"R. Luo, T. Hsu, K. Su","doi":"10.1109/ICMECH.2005.1529393","DOIUrl":"https://doi.org/10.1109/ICMECH.2005.1529393","url":null,"abstract":"We have developed an intelligent multi sensor-based security robot system that can detect abnormal and hazardous situation and notify us. The security robot is constructed using an aluminum frame. The contour of the robot is cylindrical. The diameter is about 50 cm, and height is 150 cm. The function of the security robot contains six parts, including software development system; obstacle avoidance and motion planning system, image system, sensor system, remote supervisory system and other systems. In the sensor system, we use multisensor integration algorithm. Then we also present the remote mobile security system (RMS) for the security robot. We use touch panel to display system state, and design a general user interface (GUI) on the security robot. We demonstrate the remote supervisory system to control the security robot using direct control mode and behavior control mode. We design a new recharging station for the security robot. It moves by X axis and rotates by Z axis, and guards the security robot easily to connect using sensor based method. Finally, we implement security function using the security robot to detect fire event and intruder. The security robot can transmit the message of the detection result to the cellular phone using GSM modem, and transmits the detection result to the client computer through Internet.","PeriodicalId":175701,"journal":{"name":"IEEE International Conference on Mechatronics, 2005. ICM '05.","volume":"47 12","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114026029","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 : 2005-07-10DOI: 10.1109/ICMECH.2005.1529364
Ching-Yuan Hung, H. Huang, Kai-Chun Su, Yu-Tsung Wang, Yu-Cheng Lin
This study was focused on the design and experimental verification of an electroporation (EP) biochip for transgenic zebrafishes (Danio rerio). For generating suitable pulses, a lab-built circuit was designed to provide suitable voltages (0~200 V) and produce almost 1,000-V/cm electric field in the transgenic zebra fish experiments. In addition, a novel biochip composed of biocompatible electrodes, holder device, and in-vitro electroporation chip was fabricated by micro electromechanical system (MEMS) technology. Modular design would aid replacing each component conveniently and rapidly. (CdSe)ZnS quantum dots, QDs, genes coding for green fluorescence protein, GFP, and trypan-blue dye were used to verify the successful transfection to the zebra fish embryos. The experimental results showed that the delivery rate was up to 62% utilizing an EP biochip to deliver trypan-blue dye, QDs or GFP genes into zebra fish embryos. This study demonstrated that the gene transfer could be easily accomplished by simply-designed circuit and quickly observed by quantum dots, and it will be helpful for applications to the elaboration of aquaculture fishery in the future.
{"title":"Utilizing genes and quantum dots to verify the design and experimental performance of the electroporation biochip for transgenic zebrafishes","authors":"Ching-Yuan Hung, H. Huang, Kai-Chun Su, Yu-Tsung Wang, Yu-Cheng Lin","doi":"10.1109/ICMECH.2005.1529364","DOIUrl":"https://doi.org/10.1109/ICMECH.2005.1529364","url":null,"abstract":"This study was focused on the design and experimental verification of an electroporation (EP) biochip for transgenic zebrafishes (Danio rerio). For generating suitable pulses, a lab-built circuit was designed to provide suitable voltages (0~200 V) and produce almost 1,000-V/cm electric field in the transgenic zebra fish experiments. In addition, a novel biochip composed of biocompatible electrodes, holder device, and in-vitro electroporation chip was fabricated by micro electromechanical system (MEMS) technology. Modular design would aid replacing each component conveniently and rapidly. (CdSe)ZnS quantum dots, QDs, genes coding for green fluorescence protein, GFP, and trypan-blue dye were used to verify the successful transfection to the zebra fish embryos. The experimental results showed that the delivery rate was up to 62% utilizing an EP biochip to deliver trypan-blue dye, QDs or GFP genes into zebra fish embryos. This study demonstrated that the gene transfer could be easily accomplished by simply-designed circuit and quickly observed by quantum dots, and it will be helpful for applications to the elaboration of aquaculture fishery in the future.","PeriodicalId":175701,"journal":{"name":"IEEE International Conference on Mechatronics, 2005. ICM '05.","volume":"59 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114053901","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 : 2005-07-10DOI: 10.1109/ICMECH.2005.1529217
Ching-Chih Tsai, Hung-Hsing Lin, Kim-Hon Wong
This paper develops techniques for position recovery of a free-ranging automatic guided vehicle using a dead-reckoning device and a laser scanner. Extended information filtering (ElF) scheme is presented using a simple rectangular model and a 2-D laser scanner. By continuously updating the robot's pose and matching the laser data with the environmental model, we find that the outliers can be filtered out effectively by validation gate. Moreover, a range-weighted Hough transform (RWHT) is used to extract the modeled lines from the clutter data. Computer simulations and experimental results are performed to illustrate the feasibility and efficacy of the proposed position recovery methods.
{"title":"Laser-based position recovery of a free-ranging automatic guided vehicle","authors":"Ching-Chih Tsai, Hung-Hsing Lin, Kim-Hon Wong","doi":"10.1109/ICMECH.2005.1529217","DOIUrl":"https://doi.org/10.1109/ICMECH.2005.1529217","url":null,"abstract":"This paper develops techniques for position recovery of a free-ranging automatic guided vehicle using a dead-reckoning device and a laser scanner. Extended information filtering (ElF) scheme is presented using a simple rectangular model and a 2-D laser scanner. By continuously updating the robot's pose and matching the laser data with the environmental model, we find that the outliers can be filtered out effectively by validation gate. Moreover, a range-weighted Hough transform (RWHT) is used to extract the modeled lines from the clutter data. Computer simulations and experimental results are performed to illustrate the feasibility and efficacy of the proposed position recovery methods.","PeriodicalId":175701,"journal":{"name":"IEEE International Conference on Mechatronics, 2005. ICM '05.","volume":"439 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115937124","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 : 2005-07-10DOI: 10.1109/ICMECH.2005.1529330
Y. Yeh, J. Yen, Yung-Hao Peng, Jyh-Fa Lee
High resolution and precision servo mechanism has played an important role in micro and nano optics. Its application includes projection systems, head-mount displays, scanners, cameras, heat tracking systems and so on... The servo mechanisms are often used to enhance the optical resolution by driving the scanning mirrors to reach position resolution far beyond the conventional optical systems. It is often necessary for these servo mechanisms to achieve high operation speeds while maintaining extreme positioning accuracy. To achieve this goal, this paper introduces a novel, high speed, high precision servo mechanism for an optical scanning platform. The proposed design uses piezoelectric transducers (PZT) with flexure joints. The use of the flexure joints not only eliminates backlash to achieve smooth and continuous displacement but also reduces friction to eradicate the need for lubrication. In order to understand the basic dynamics of the platform, this paper uses ANSYS for the finite element analysis (FEA) of all the desirable physical properties of the mechanism. The FEA analysis is also used for simulating the dynamic behavior of the control system. Based on the simulation results an improved controller is constructed for better scanning resolutions.
{"title":"Design for control of a flexure jointed optical servo scanning platform","authors":"Y. Yeh, J. Yen, Yung-Hao Peng, Jyh-Fa Lee","doi":"10.1109/ICMECH.2005.1529330","DOIUrl":"https://doi.org/10.1109/ICMECH.2005.1529330","url":null,"abstract":"High resolution and precision servo mechanism has played an important role in micro and nano optics. Its application includes projection systems, head-mount displays, scanners, cameras, heat tracking systems and so on... The servo mechanisms are often used to enhance the optical resolution by driving the scanning mirrors to reach position resolution far beyond the conventional optical systems. It is often necessary for these servo mechanisms to achieve high operation speeds while maintaining extreme positioning accuracy. To achieve this goal, this paper introduces a novel, high speed, high precision servo mechanism for an optical scanning platform. The proposed design uses piezoelectric transducers (PZT) with flexure joints. The use of the flexure joints not only eliminates backlash to achieve smooth and continuous displacement but also reduces friction to eradicate the need for lubrication. In order to understand the basic dynamics of the platform, this paper uses ANSYS for the finite element analysis (FEA) of all the desirable physical properties of the mechanism. The FEA analysis is also used for simulating the dynamic behavior of the control system. Based on the simulation results an improved controller is constructed for better scanning resolutions.","PeriodicalId":175701,"journal":{"name":"IEEE International Conference on Mechatronics, 2005. ICM '05.","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124253656","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 : 2005-07-10DOI: 10.1109/ICMECH.2005.1529235
J. Juang, Wen-Kai Liu, Cheng-Yu Tsai
This paper presents a control problem involving an experimental propeller setup that is called the twin rotor multi-input multi-output system (TRMS). The control objective is to make the beam of the TRMS move quickly and accurately to the desired attitudes, both the pitch angle and the azimuth angle in the condition of decoupling between two axes. It is difficult to design a suitable controller because of the influence between the two axes and nonlinear movement. For easy demonstration in the vertical and horizontal separately, the TRMS is decoupled by the main rotor and tail rotor. An intelligent control scheme which utilizes a hybrid PID controller is implemented to this problem. Simulation results show that the new approach to the TRMS control problem can improve the tracking performance and reduce control energy.
{"title":"Intelligent control scheme for twin rotor MIMO system","authors":"J. Juang, Wen-Kai Liu, Cheng-Yu Tsai","doi":"10.1109/ICMECH.2005.1529235","DOIUrl":"https://doi.org/10.1109/ICMECH.2005.1529235","url":null,"abstract":"This paper presents a control problem involving an experimental propeller setup that is called the twin rotor multi-input multi-output system (TRMS). The control objective is to make the beam of the TRMS move quickly and accurately to the desired attitudes, both the pitch angle and the azimuth angle in the condition of decoupling between two axes. It is difficult to design a suitable controller because of the influence between the two axes and nonlinear movement. For easy demonstration in the vertical and horizontal separately, the TRMS is decoupled by the main rotor and tail rotor. An intelligent control scheme which utilizes a hybrid PID controller is implemented to this problem. Simulation results show that the new approach to the TRMS control problem can improve the tracking performance and reduce control energy.","PeriodicalId":175701,"journal":{"name":"IEEE International Conference on Mechatronics, 2005. ICM '05.","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117026717","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 : 2005-07-10DOI: 10.1109/ICMECH.2005.1529270
Y. Wang, J. He, Y.P. Liu, J. Wu, Y. Haung, C.K. Lee
Piezoelectric transformers were known to power the cold cathode fluorescent lamp (CCFL) of the LCD-TV backlight module with high efficiency. Previously, electrode distribution of the input and output electrode of an unipoled disk-type piezoelectric transformer was known to be directly proportion to the voltage step-up ratio. It is detailed that the electrode area ratio also influences the efficiency of piezoelectric transformers as the loading impedance must match the output impedance of the piezoelectric transformer to achieve high efficiency. More specifically, the area ratio was found to be a good design parameter to achieve high operational efficiency. Orthogonally condition among different modes was used to design the surface electrode shape of traditional Rosen type piezoelectric transformers before. Earlier experimental results indicated that this modified type of piezoelectric modal actuator, which was named quasi-modal Rosen type piezoelectric transformer, possessed output waveform with far less high-order harmonics when compared to traditional Rosen type piezoelectric transformers. Furthermore, it had better energy transfer efficiency than the traditional uniformly distributed type piezoelectric transformers. Follow the innovative design thinking mentioned above, this paper used the distribution sensor and actuator concept to design the input and output electrode shape of the unipoled disk-type piezoelectric transformers. With an intention to optimize the input electrode shape, it was designed to match the modal strain field of the piezoelectric structure. In addition, the output static capacitance of the piezoelectric transformer was designed to match the loading impedance as mismatch leads to low energy transfer efficiency. It is to be noted that low efficiency results in rising surface temperature or even thermal breakdown. The design methodology of a disk type piezoelectric transformer, which can achieve high energy transfer efficiency and high step up ratio, was designed to illustrate the above-mentioned purpose. Finite element software ANSYS was used to simulate the vibration of the piezoelectric transformer first. Experimental results were also presented to verify the theoretical predictions as well as to examine the effectiveness of the innovative design rule proposed.
{"title":"Theory and experiment of high voltage step-up ratio disk type piezoelectric transformer for LCD-TV","authors":"Y. Wang, J. He, Y.P. Liu, J. Wu, Y. Haung, C.K. Lee","doi":"10.1109/ICMECH.2005.1529270","DOIUrl":"https://doi.org/10.1109/ICMECH.2005.1529270","url":null,"abstract":"Piezoelectric transformers were known to power the cold cathode fluorescent lamp (CCFL) of the LCD-TV backlight module with high efficiency. Previously, electrode distribution of the input and output electrode of an unipoled disk-type piezoelectric transformer was known to be directly proportion to the voltage step-up ratio. It is detailed that the electrode area ratio also influences the efficiency of piezoelectric transformers as the loading impedance must match the output impedance of the piezoelectric transformer to achieve high efficiency. More specifically, the area ratio was found to be a good design parameter to achieve high operational efficiency. Orthogonally condition among different modes was used to design the surface electrode shape of traditional Rosen type piezoelectric transformers before. Earlier experimental results indicated that this modified type of piezoelectric modal actuator, which was named quasi-modal Rosen type piezoelectric transformer, possessed output waveform with far less high-order harmonics when compared to traditional Rosen type piezoelectric transformers. Furthermore, it had better energy transfer efficiency than the traditional uniformly distributed type piezoelectric transformers. Follow the innovative design thinking mentioned above, this paper used the distribution sensor and actuator concept to design the input and output electrode shape of the unipoled disk-type piezoelectric transformers. With an intention to optimize the input electrode shape, it was designed to match the modal strain field of the piezoelectric structure. In addition, the output static capacitance of the piezoelectric transformer was designed to match the loading impedance as mismatch leads to low energy transfer efficiency. It is to be noted that low efficiency results in rising surface temperature or even thermal breakdown. The design methodology of a disk type piezoelectric transformer, which can achieve high energy transfer efficiency and high step up ratio, was designed to illustrate the above-mentioned purpose. Finite element software ANSYS was used to simulate the vibration of the piezoelectric transformer first. Experimental results were also presented to verify the theoretical predictions as well as to examine the effectiveness of the innovative design rule proposed.","PeriodicalId":175701,"journal":{"name":"IEEE International Conference on Mechatronics, 2005. ICM '05.","volume":"405 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122795016","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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