Pub Date : 2000-01-19DOI: 10.1109/ICIT.2000.854139
S.R. Rao, B. Bandyopadhyay, B. Seth
The challenge in the endpoint control of flexible manipulators is of obtaining an exact model of the nonlinear flexible system and then simulating it for further analysis. But being an infinite dimensional, they pose problems in terms of predicting the behaviour and also exact mathematical representation. This problem of obtaining an exact model can be solved if the behaviour of the flexible link system can be represented by a neural network, which would help further simulation, analysis and control thus eliminating the requirement of the exact mathematical representation of the system.
{"title":"Modeling and identification of flexible link using neural networks","authors":"S.R. Rao, B. Bandyopadhyay, B. Seth","doi":"10.1109/ICIT.2000.854139","DOIUrl":"https://doi.org/10.1109/ICIT.2000.854139","url":null,"abstract":"The challenge in the endpoint control of flexible manipulators is of obtaining an exact model of the nonlinear flexible system and then simulating it for further analysis. But being an infinite dimensional, they pose problems in terms of predicting the behaviour and also exact mathematical representation. This problem of obtaining an exact model can be solved if the behaviour of the flexible link system can be represented by a neural network, which would help further simulation, analysis and control thus eliminating the requirement of the exact mathematical representation of the system.","PeriodicalId":405648,"journal":{"name":"Proceedings of IEEE International Conference on Industrial Technology 2000 (IEEE Cat. No.00TH8482)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125413071","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 : 2000-01-19DOI: 10.1109/ICIT.2000.854180
V. Sriram, S. Sengupta, A. Patra
A single-phase H-bridge transistorised converter intended for front-end (FE) power conversion at a high power-factor and a constant desired output voltage has been analysed. Based on the desired boost-mode operation of the converter, the average state-space model has been derived from the basic circuit equations. Equilibrium points of operation of the converter have been obtained from the state-space model. As the converter is intended for use as a voltage source for an inverter, the requirement of maintaining a constant DC voltage at its output becomes a necessary criterion. Two feedback schemes for controlling the output voltage in closed-loop have been designed. Their performances have been compared by simulation studies. Some experimental studies on the converter operating in open-loop have been made and results obtained in the boost-mode of operation.
{"title":"Control of a transistorised single-phase bridge converter operated in the rectifier mode","authors":"V. Sriram, S. Sengupta, A. Patra","doi":"10.1109/ICIT.2000.854180","DOIUrl":"https://doi.org/10.1109/ICIT.2000.854180","url":null,"abstract":"A single-phase H-bridge transistorised converter intended for front-end (FE) power conversion at a high power-factor and a constant desired output voltage has been analysed. Based on the desired boost-mode operation of the converter, the average state-space model has been derived from the basic circuit equations. Equilibrium points of operation of the converter have been obtained from the state-space model. As the converter is intended for use as a voltage source for an inverter, the requirement of maintaining a constant DC voltage at its output becomes a necessary criterion. Two feedback schemes for controlling the output voltage in closed-loop have been designed. Their performances have been compared by simulation studies. Some experimental studies on the converter operating in open-loop have been made and results obtained in the boost-mode of operation.","PeriodicalId":405648,"journal":{"name":"Proceedings of IEEE International Conference on Industrial Technology 2000 (IEEE Cat. No.00TH8482)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114769319","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 : 2000-01-19DOI: 10.1109/ICIT.2000.854111
Marcos A. Rodrigues, Yonghuai Liu
We report on the design and validation of a method for correspondenceless estimation of transformation parameters. The problem we are tackling is connected with the verification of dimensional specifications of filter components in a manufacturing line. Our proposed method consists of acquiring range images of the same object's region from known, different viewpoints and use this information to calibrate camera parameters. Calibration errors can then be used to reason about actual physical dimensions and compare these with given specifications. We are investigating a correspondenceless method because the establishment of point to point correspondences between real images is a truly challenging task. Our proposed algorithm is based on geometric properties of image points which can be defined as invariants uniquely determined by the specific rigid transformation. The same invariants are also defined for a small subset of data, providing that the subset contains at least three data points. The algorithm is based on computing two sets of possible transformation parameters using different subsets of image data. The algorithm makes full use of rigid geometric constraints of image points synthesised into a single coordinate system and provides a closed form solution to all parameters of interest. We also implemented another well known correspondenceless calibration algorithm based on the scatter matrix. Experimental results have shown that the proposed algorithm is generally more accurate than the scatter matrix based algorithm and that it can be effectively used in the context of the described industrial inspection task.
{"title":"A new correspondenceless geometric algorithm for automatic inspection of filter components","authors":"Marcos A. Rodrigues, Yonghuai Liu","doi":"10.1109/ICIT.2000.854111","DOIUrl":"https://doi.org/10.1109/ICIT.2000.854111","url":null,"abstract":"We report on the design and validation of a method for correspondenceless estimation of transformation parameters. The problem we are tackling is connected with the verification of dimensional specifications of filter components in a manufacturing line. Our proposed method consists of acquiring range images of the same object's region from known, different viewpoints and use this information to calibrate camera parameters. Calibration errors can then be used to reason about actual physical dimensions and compare these with given specifications. We are investigating a correspondenceless method because the establishment of point to point correspondences between real images is a truly challenging task. Our proposed algorithm is based on geometric properties of image points which can be defined as invariants uniquely determined by the specific rigid transformation. The same invariants are also defined for a small subset of data, providing that the subset contains at least three data points. The algorithm is based on computing two sets of possible transformation parameters using different subsets of image data. The algorithm makes full use of rigid geometric constraints of image points synthesised into a single coordinate system and provides a closed form solution to all parameters of interest. We also implemented another well known correspondenceless calibration algorithm based on the scatter matrix. Experimental results have shown that the proposed algorithm is generally more accurate than the scatter matrix based algorithm and that it can be effectively used in the context of the described industrial inspection task.","PeriodicalId":405648,"journal":{"name":"Proceedings of IEEE International Conference on Industrial Technology 2000 (IEEE Cat. No.00TH8482)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114294394","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 : 2000-01-19DOI: 10.1109/ICIT.2000.854175
N. Martins, J. Dias
This article addresses the problem of recovering a tridimensional scene from only one uncalibrated static camera and images from planar mirrors. We present a linear solution for 3D Euclidean reconstruction based on multiocular geometry, epipolar geometry and projective geometric properties. From the recovered points of the scene we can obtain information related with distances, areas, curvatures, dimensions and even volumes of its objects. A system based on this technique could be applied on the industry, in tasks of great importance, such as the quality tests and metrology inspection. The system is simple, low cost and could achieve good performance.
{"title":"Visual inspection and 3D reconstruction based on image-to-mirror planes","authors":"N. Martins, J. Dias","doi":"10.1109/ICIT.2000.854175","DOIUrl":"https://doi.org/10.1109/ICIT.2000.854175","url":null,"abstract":"This article addresses the problem of recovering a tridimensional scene from only one uncalibrated static camera and images from planar mirrors. We present a linear solution for 3D Euclidean reconstruction based on multiocular geometry, epipolar geometry and projective geometric properties. From the recovered points of the scene we can obtain information related with distances, areas, curvatures, dimensions and even volumes of its objects. A system based on this technique could be applied on the industry, in tasks of great importance, such as the quality tests and metrology inspection. The system is simple, low cost and could achieve good performance.","PeriodicalId":405648,"journal":{"name":"Proceedings of IEEE International Conference on Industrial Technology 2000 (IEEE Cat. No.00TH8482)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126486279","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 : 2000-01-19DOI: 10.1109/ICIT.2000.854261
K. Sundareswaran, S. Palani
The tracking of maximum efficiency point of a lightly loaded induction motor is generally obtained using search technique which is time consuming and the machine is subjected to many step changes of voltage which is undesirable. This paper presents a novel technique for energy efficient operation of voltage controlled induction motor drive using artificial neural networks (ANN). In the proposed method, the time required to converge to the best efficiency point of the drive is minimum and the machine is subjected to only one step change of voltage, irrespective of operating point. The back-propagation neural network is trained off-line to identify the optimal efficiency point of the motor in the entire operating range with a no priori knowledge of the machine parameters.
{"title":"Performance enhancement of AC voltage controller-fed induction motor drive using neural networks","authors":"K. Sundareswaran, S. Palani","doi":"10.1109/ICIT.2000.854261","DOIUrl":"https://doi.org/10.1109/ICIT.2000.854261","url":null,"abstract":"The tracking of maximum efficiency point of a lightly loaded induction motor is generally obtained using search technique which is time consuming and the machine is subjected to many step changes of voltage which is undesirable. This paper presents a novel technique for energy efficient operation of voltage controlled induction motor drive using artificial neural networks (ANN). In the proposed method, the time required to converge to the best efficiency point of the drive is minimum and the machine is subjected to only one step change of voltage, irrespective of operating point. The back-propagation neural network is trained off-line to identify the optimal efficiency point of the motor in the entire operating range with a no priori knowledge of the machine parameters.","PeriodicalId":405648,"journal":{"name":"Proceedings of IEEE International Conference on Industrial Technology 2000 (IEEE Cat. No.00TH8482)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131567754","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 : 2000-01-19DOI: 10.1109/ICIT.2000.854085
M. Vidyasagar
In this talk, a brief overview is given of the evolution of robotics to date. It is argued that unless robots are equipped with some 'intelligence,' further progress in robotics will not be possible. Some of the challenges in building intelligent robotic systems, especially in an Indian context, are discussed.
{"title":"Challenges in building intelligent robotic systems","authors":"M. Vidyasagar","doi":"10.1109/ICIT.2000.854085","DOIUrl":"https://doi.org/10.1109/ICIT.2000.854085","url":null,"abstract":"In this talk, a brief overview is given of the evolution of robotics to date. It is argued that unless robots are equipped with some 'intelligence,' further progress in robotics will not be possible. Some of the challenges in building intelligent robotic systems, especially in an Indian context, are discussed.","PeriodicalId":405648,"journal":{"name":"Proceedings of IEEE International Conference on Industrial Technology 2000 (IEEE Cat. No.00TH8482)","volume":"30 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133971071","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 : 2000-01-19DOI: 10.1109/ICIT.2000.854110
R. Mathur, P. Chandra, S. Gupta
It has been the endeavour of the processing community to develop content-based segmentation of video. That is, to separate out all the objects in the video into distinct video object planes (VOPs) and generate a layered bit-stream wherein each bit-stream corresponds to an individual object plane in the video. This work aspires towards the above goals. It is in synchrony with the targets of MPEG-4. We propose a general and robust algorithm for segmentation. Our algorithm does not assume any prior modelling of the objects being segmented, further, the bit rate generated is low as compression is achieved at two levels. Firstly, only the regions of the image that change across frames are coded and transmitted. Secondly, the extracted portion of the image is compressed using a flexible variation of DCT coding called shape-adaptive DCT. Typically, in video-conferencing applications wherein the goal is to minimise the transmission bandwidth, this algorithm produces very desirable results.
{"title":"A low bit rate video coder using content-based automatic segmentation and shape-adaptive DCT","authors":"R. Mathur, P. Chandra, S. Gupta","doi":"10.1109/ICIT.2000.854110","DOIUrl":"https://doi.org/10.1109/ICIT.2000.854110","url":null,"abstract":"It has been the endeavour of the processing community to develop content-based segmentation of video. That is, to separate out all the objects in the video into distinct video object planes (VOPs) and generate a layered bit-stream wherein each bit-stream corresponds to an individual object plane in the video. This work aspires towards the above goals. It is in synchrony with the targets of MPEG-4. We propose a general and robust algorithm for segmentation. Our algorithm does not assume any prior modelling of the objects being segmented, further, the bit rate generated is low as compression is achieved at two levels. Firstly, only the regions of the image that change across frames are coded and transmitted. Secondly, the extracted portion of the image is compressed using a flexible variation of DCT coding called shape-adaptive DCT. Typically, in video-conferencing applications wherein the goal is to minimise the transmission bandwidth, this algorithm produces very desirable results.","PeriodicalId":405648,"journal":{"name":"Proceedings of IEEE International Conference on Industrial Technology 2000 (IEEE Cat. No.00TH8482)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134007509","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 : 2000-01-19DOI: 10.1109/ICIT.2000.854166
P. Doraraju, R. K. Nondy
In this paper, a new approach to decentralized adaptive stabilization using a minimal control synthesis algorithm for a multimachine power system is proposed. This controller uses proportional plus integral type adaptation to satisfy the hyperstability conditions for taking care of parameter changes of the system. The stabilization signals are synthesized at the excitation input of each machine such that desired system performance as specified in terms of reference model are satisfied. The reference model parameters are chosen to elicit a well defined closed loop performance. A guarantee of stability to the overall system is also presented. The proposed adaptive control scheme avoids the difficulty of satisfying the Erzberger's model matching conditions and the burden of implementing an online parameter estimator. Above all, the hyperstability guarantees asymptotical stability of the machines under a disturbance. Simulation results of a multi-machine power system are presented which show that the controller works well under system parameter changes and with different disturbances.
{"title":"A decentralized adaptive stabilizer based on minimal control synthesis algorithm for a multi-machine power system","authors":"P. Doraraju, R. K. Nondy","doi":"10.1109/ICIT.2000.854166","DOIUrl":"https://doi.org/10.1109/ICIT.2000.854166","url":null,"abstract":"In this paper, a new approach to decentralized adaptive stabilization using a minimal control synthesis algorithm for a multimachine power system is proposed. This controller uses proportional plus integral type adaptation to satisfy the hyperstability conditions for taking care of parameter changes of the system. The stabilization signals are synthesized at the excitation input of each machine such that desired system performance as specified in terms of reference model are satisfied. The reference model parameters are chosen to elicit a well defined closed loop performance. A guarantee of stability to the overall system is also presented. The proposed adaptive control scheme avoids the difficulty of satisfying the Erzberger's model matching conditions and the burden of implementing an online parameter estimator. Above all, the hyperstability guarantees asymptotical stability of the machines under a disturbance. Simulation results of a multi-machine power system are presented which show that the controller works well under system parameter changes and with different disturbances.","PeriodicalId":405648,"journal":{"name":"Proceedings of IEEE International Conference on Industrial Technology 2000 (IEEE Cat. No.00TH8482)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130143927","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 : 2000-01-19DOI: 10.1109/ICIT.2000.854112
C. Vijayakumar, R. Rajagopal
Tracking of multiple targets by using only the bearing information is an important problem in passive sensing scenarios such as passive sonar or infrared seeker applications. In this paper, a new algorithm is presented to adaptively estimate the DOAs of multiple moving targets when linear equispace array (LES) is used for making the measurements. These algorithms are based on the differential MUSIC method. The results obtained by these algorithms are then applied as input to a nonlinear state linear measurement unscented filter. The unscented filter based tracker is compared with the EKF based tracker. Simulation results show that the former is superior to the latter.
{"title":"Passive target tracking by unscented filters","authors":"C. Vijayakumar, R. Rajagopal","doi":"10.1109/ICIT.2000.854112","DOIUrl":"https://doi.org/10.1109/ICIT.2000.854112","url":null,"abstract":"Tracking of multiple targets by using only the bearing information is an important problem in passive sensing scenarios such as passive sonar or infrared seeker applications. In this paper, a new algorithm is presented to adaptively estimate the DOAs of multiple moving targets when linear equispace array (LES) is used for making the measurements. These algorithms are based on the differential MUSIC method. The results obtained by these algorithms are then applied as input to a nonlinear state linear measurement unscented filter. The unscented filter based tracker is compared with the EKF based tracker. Simulation results show that the former is superior to the latter.","PeriodicalId":405648,"journal":{"name":"Proceedings of IEEE International Conference on Industrial Technology 2000 (IEEE Cat. No.00TH8482)","volume":"431 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133279889","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 : 2000-01-19DOI: 10.1109/ICIT.2000.854098
F. Jiménez, M. Courvoisier, A. Garcia, G. Muñoz, N. Harchani, M. Al-Mohamed, D. Esteve
The improvement of micro-technologies in the microelectronics world has allowed the creation of ultra miniaturised devices, which are called MEMS-micro electro mechanical systems or microsystems. A major problem concerns the design of these heterogeneous circuits because it associates disciplines such as electronics, mechanics, chemistry, etc. This paper presents models and tools developed for system design and synthesis of MEMS based on SDL (specification description language), structured analysis for real time (SA-RT) and Petri nets (PN).
{"title":"Tools and models for systems design and synthesis of MEMS based on asynchronous circuits","authors":"F. Jiménez, M. Courvoisier, A. Garcia, G. Muñoz, N. Harchani, M. Al-Mohamed, D. Esteve","doi":"10.1109/ICIT.2000.854098","DOIUrl":"https://doi.org/10.1109/ICIT.2000.854098","url":null,"abstract":"The improvement of micro-technologies in the microelectronics world has allowed the creation of ultra miniaturised devices, which are called MEMS-micro electro mechanical systems or microsystems. A major problem concerns the design of these heterogeneous circuits because it associates disciplines such as electronics, mechanics, chemistry, etc. This paper presents models and tools developed for system design and synthesis of MEMS based on SDL (specification description language), structured analysis for real time (SA-RT) and Petri nets (PN).","PeriodicalId":405648,"journal":{"name":"Proceedings of IEEE International Conference on Industrial Technology 2000 (IEEE Cat. No.00TH8482)","volume":"316 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132104033","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：