Pub Date : 1989-11-06DOI: 10.1109/IECON.1989.69663
R. Unnikrishnan, A. Gupta
A novel method for reducing the order of a discrete-time transfer function is introduced. The objective of the reduction process is to preserve design parameters of the transfer function so that controllers designed on the basis of the reduced model will satisfactorily compensate the original system. In the remainder matching method, the higher-order terms in the continued fraction expansion are matched to an mth-order transfer function at m chosen frequencies. The mth-order matched transfer function is then substituted in the continued fraction and inverted to obtain the reduced-order model. Such an approach allows the designer to choose significant frequencies such as gain crossover frequency and bandwidth for the matching process. As a result, the compensation for the original system and that for the reduced-order model will have a better match.<>
{"title":"Reduced order models for discrete time systems using remainder matching method","authors":"R. Unnikrishnan, A. Gupta","doi":"10.1109/IECON.1989.69663","DOIUrl":"https://doi.org/10.1109/IECON.1989.69663","url":null,"abstract":"A novel method for reducing the order of a discrete-time transfer function is introduced. The objective of the reduction process is to preserve design parameters of the transfer function so that controllers designed on the basis of the reduced model will satisfactorily compensate the original system. In the remainder matching method, the higher-order terms in the continued fraction expansion are matched to an mth-order transfer function at m chosen frequencies. The mth-order matched transfer function is then substituted in the continued fraction and inverted to obtain the reduced-order model. Such an approach allows the designer to choose significant frequencies such as gain crossover frequency and bandwidth for the matching process. As a result, the compensation for the original system and that for the reduced-order model will have a better match.<<ETX>>","PeriodicalId":384081,"journal":{"name":"15th Annual Conference of IEEE Industrial Electronics Society","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124941578","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 : 1989-11-06DOI: 10.1109/IECON.1989.69715
S. Yamada, H. Fujikawa, O. Takeuchi, Y. Wakasugi
Experimental results on the fuzzy control of a roof crane are presented in contrast to those for a suboptimal controller. Results indicate that the fuzzy control method is better than the switching velocity method.<>
{"title":"Fuzzy control of the roof crane","authors":"S. Yamada, H. Fujikawa, O. Takeuchi, Y. Wakasugi","doi":"10.1109/IECON.1989.69715","DOIUrl":"https://doi.org/10.1109/IECON.1989.69715","url":null,"abstract":"Experimental results on the fuzzy control of a roof crane are presented in contrast to those for a suboptimal controller. Results indicate that the fuzzy control method is better than the switching velocity method.<<ETX>>","PeriodicalId":384081,"journal":{"name":"15th Annual Conference of IEEE Industrial Electronics Society","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127557843","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 : 1989-11-06DOI: 10.1109/IECON.1989.69644
S. T. Hung
Analysis of a priori design information often justifies the use of self-tuning of simple, application-specific controller structures. This justification arises from indications that good performance with respect to a primary performance index can be maintained through the slight adjustment of only a few controller parameters. The optimality of this adjustment is often dictated by the level of degraded performance of the system with respect to measurable, secondary performance indices. These multiple, countermanding indices realize a controller tuning conflict with respect to the self-tuning controller parameters. The author describes how a priori knowledge of such an inherent conflict can be used in the design of a sensitivity-based self-tuning mechanism. The proposed design methodology begins with descriptions of the concept of inherent control conflicts, sensitivity-points techniques, and application of integral manifolds and averaging to self-tuning control. The preliminary design tasks entailed in the checking for feasibility of self-tuning, which includes consideration of the input and disturbance spectra are described. Averaged integral manifold computations are then utilized in the design of the pseudosensitivity estimator. An example of the design of a power system stabilizer of a single-machine-to-infinite-bus power system illustrates the application of the design technique.<>
{"title":"Self-tuning through use of inherent conflicts","authors":"S. T. Hung","doi":"10.1109/IECON.1989.69644","DOIUrl":"https://doi.org/10.1109/IECON.1989.69644","url":null,"abstract":"Analysis of a priori design information often justifies the use of self-tuning of simple, application-specific controller structures. This justification arises from indications that good performance with respect to a primary performance index can be maintained through the slight adjustment of only a few controller parameters. The optimality of this adjustment is often dictated by the level of degraded performance of the system with respect to measurable, secondary performance indices. These multiple, countermanding indices realize a controller tuning conflict with respect to the self-tuning controller parameters. The author describes how a priori knowledge of such an inherent conflict can be used in the design of a sensitivity-based self-tuning mechanism. The proposed design methodology begins with descriptions of the concept of inherent control conflicts, sensitivity-points techniques, and application of integral manifolds and averaging to self-tuning control. The preliminary design tasks entailed in the checking for feasibility of self-tuning, which includes consideration of the input and disturbance spectra are described. Averaged integral manifold computations are then utilized in the design of the pseudosensitivity estimator. An example of the design of a power system stabilizer of a single-machine-to-infinite-bus power system illustrates the application of the design technique.<<ETX>>","PeriodicalId":384081,"journal":{"name":"15th Annual Conference of IEEE Industrial Electronics Society","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132648915","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 : 1989-11-06DOI: 10.1109/IECON.1989.69725
A. Mascia, R. Ishii
Madaline rule II (MRII) and back-propagation (BP) algorithms have been implemented on a digital signal processor (DSP). Two kinds of modifications of MRII are proposed: a tree search for the best up-to-two-order combinations of neurons in a randomly chosen layer and an efficient way of setting the desired response value for the least-mean-square (LMS) adaptation of the neurons. A sigmoid table lookup function and some details of the implementation of the BP algorithm are presented. Perceptron span limitations, as the maximum number of neurons per layer, and processing times are given for both systems. This gives a good understanding of the general requirements for the implementation of perceptrons on DSP, such as memory space, data flow, and multiplier functional needs. The training behavior of the BP program on DSP is analyzed with reference to the example of handwritten character recognition. In spite of the low accuracy of DSP floating-point data, the perceptron simulation on DSP shows better results than a C-simulation program on a personal computer.<>
Madaline rule II (MRII)和反向传播(BP)算法在数字信号处理器(DSP)上实现。提出了对核磁共振成像的两种改进:在随机选择的层中树形搜索最佳的两阶神经元组合，以及为神经元的最小均方(LMS)自适应设置期望响应值的有效方法。给出了一个s型表查找函数和BP算法实现的一些细节。感知器的跨度限制，如每层神经元的最大数量，和处理时间都给出了两个系统。这使我们很好地理解了在DSP上实现感知器的一般要求，如内存空间、数据流和乘法器功能需求。以手写体字符识别为例，分析了BP程序在DSP上的训练行为。尽管DSP的浮点数据精度较低，但在DSP上的感知机仿真结果优于在个人计算机上的c -仿真程序。
{"title":"Neural net implementation on single-chip digital signal processor","authors":"A. Mascia, R. Ishii","doi":"10.1109/IECON.1989.69725","DOIUrl":"https://doi.org/10.1109/IECON.1989.69725","url":null,"abstract":"Madaline rule II (MRII) and back-propagation (BP) algorithms have been implemented on a digital signal processor (DSP). Two kinds of modifications of MRII are proposed: a tree search for the best up-to-two-order combinations of neurons in a randomly chosen layer and an efficient way of setting the desired response value for the least-mean-square (LMS) adaptation of the neurons. A sigmoid table lookup function and some details of the implementation of the BP algorithm are presented. Perceptron span limitations, as the maximum number of neurons per layer, and processing times are given for both systems. This gives a good understanding of the general requirements for the implementation of perceptrons on DSP, such as memory space, data flow, and multiplier functional needs. The training behavior of the BP program on DSP is analyzed with reference to the example of handwritten character recognition. In spite of the low accuracy of DSP floating-point data, the perceptron simulation on DSP shows better results than a C-simulation program on a personal computer.<<ETX>>","PeriodicalId":384081,"journal":{"name":"15th Annual Conference of IEEE Industrial Electronics Society","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117332170","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 : 1989-11-06DOI: 10.1109/IECON.1989.69666
P. Lewis, P. Angeli
A method is described for the systematic development of computer models for control systems with complex relationships between multiple nonlinear phenomena and energy-storage elements. The specific example of an electromechanical position control system, with consideration of interrelated actions that include static friction, Coulomb friction, backlash, and a significant inertial load, is considered. The use of piecewise-linear models provides an extensive set of operational modes, but methodology is presented for consideration of the conditions for all possible changes of mode and the actions that accompany each change. Simulation results are presented.<>
{"title":"A simulation technique for control systems with multiple interrelated nonlinear phenomena and energy storage elements","authors":"P. Lewis, P. Angeli","doi":"10.1109/IECON.1989.69666","DOIUrl":"https://doi.org/10.1109/IECON.1989.69666","url":null,"abstract":"A method is described for the systematic development of computer models for control systems with complex relationships between multiple nonlinear phenomena and energy-storage elements. The specific example of an electromechanical position control system, with consideration of interrelated actions that include static friction, Coulomb friction, backlash, and a significant inertial load, is considered. The use of piecewise-linear models provides an extensive set of operational modes, but methodology is presented for consideration of the conditions for all possible changes of mode and the actions that accompany each change. Simulation results are presented.<<ETX>>","PeriodicalId":384081,"journal":{"name":"15th Annual Conference of IEEE Industrial Electronics Society","volume":"158 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123455526","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 : 1989-11-06DOI: 10.1109/IECON.1989.69668
Satoshi Tadokoro, Ichiro Kimura, T. Takamori
A novel measure for end-effector dexterity called stochastic manipulability is proposed. This index is based on a kinematic value that is invariable according to the degrees of freedom (DOFs) of manipulator mechanisms and those of task spaces. The harmonic mean manipulability index is improved by normalizing the measure through stochastic consideration of manipulator motion and by adopting the average of joint speeds in place of the sum. This measure can compare the dexterities of manipulators having various DOFs. Therefore, the measure is effective not only for trajectory planning but also for kinematic design by simulation comparisons. The application to 2-DOF and 3-DOF planar manipulators demonstrates the usefulness of the index.<>
{"title":"A dexterity measure for trajectory planning and kinematic design of redundant manipulators","authors":"Satoshi Tadokoro, Ichiro Kimura, T. Takamori","doi":"10.1109/IECON.1989.69668","DOIUrl":"https://doi.org/10.1109/IECON.1989.69668","url":null,"abstract":"A novel measure for end-effector dexterity called stochastic manipulability is proposed. This index is based on a kinematic value that is invariable according to the degrees of freedom (DOFs) of manipulator mechanisms and those of task spaces. The harmonic mean manipulability index is improved by normalizing the measure through stochastic consideration of manipulator motion and by adopting the average of joint speeds in place of the sum. This measure can compare the dexterities of manipulators having various DOFs. Therefore, the measure is effective not only for trajectory planning but also for kinematic design by simulation comparisons. The application to 2-DOF and 3-DOF planar manipulators demonstrates the usefulness of the index.<<ETX>>","PeriodicalId":384081,"journal":{"name":"15th Annual Conference of IEEE Industrial Electronics Society","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126468456","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 : 1989-11-06DOI: 10.1109/IECON.1989.69653
Guo Xiang, L. Xiang
The authors consider the self-adaptive property of a Clegg integrator using an asymmetrical harmonic linearized function. Consideration is given to the design of a twice-optimum system with a nonlinear proportion integrator. The production and elimination of a limit cycle in the nonlinearized system are studied with the harmonic linearized technique and digital simulation. Results show that the harmonic linearized method can be used effectively to design the nonlinearized system.<>
{"title":"Design for a kind of nonlinearized system","authors":"Guo Xiang, L. Xiang","doi":"10.1109/IECON.1989.69653","DOIUrl":"https://doi.org/10.1109/IECON.1989.69653","url":null,"abstract":"The authors consider the self-adaptive property of a Clegg integrator using an asymmetrical harmonic linearized function. Consideration is given to the design of a twice-optimum system with a nonlinear proportion integrator. The production and elimination of a limit cycle in the nonlinearized system are studied with the harmonic linearized technique and digital simulation. Results show that the harmonic linearized method can be used effectively to design the nonlinearized system.<<ETX>>","PeriodicalId":384081,"journal":{"name":"15th Annual Conference of IEEE Industrial Electronics Society","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127121241","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 : 1989-11-06DOI: 10.1109/IECON.1989.69621
M. Hoshino, T. Kudo, G. Kimura, M. Shioya
A novel type of PWM (pulse-width modulated) inverter is proposed, which has five-stepped levels of the output voltage. In this inverter, the waveform of the output voltage has smaller harmonic contents than those of a conventional PWM inverter. A novel PWM technique is analyzed. The PWM pulses included in the waveform of the output voltage are formed by the criterion on the calculation that each area of voltage pulses equals the integrated value of each time-shared area of a reference sinusoidal waveform. This PWM technique for five-stepped PWM inverters is superior to the conventional PWM technique, and the experimental results are verified by calculation using the fast Fourier transform. In addition, relations between the number of PWM pulses and the harmonic contents of the output voltage are described.<>
{"title":"New PWM technique for five-stepped PWM inverter used in photovoltaic system","authors":"M. Hoshino, T. Kudo, G. Kimura, M. Shioya","doi":"10.1109/IECON.1989.69621","DOIUrl":"https://doi.org/10.1109/IECON.1989.69621","url":null,"abstract":"A novel type of PWM (pulse-width modulated) inverter is proposed, which has five-stepped levels of the output voltage. In this inverter, the waveform of the output voltage has smaller harmonic contents than those of a conventional PWM inverter. A novel PWM technique is analyzed. The PWM pulses included in the waveform of the output voltage are formed by the criterion on the calculation that each area of voltage pulses equals the integrated value of each time-shared area of a reference sinusoidal waveform. This PWM technique for five-stepped PWM inverters is superior to the conventional PWM technique, and the experimental results are verified by calculation using the fast Fourier transform. In addition, relations between the number of PWM pulses and the harmonic contents of the output voltage are described.<<ETX>>","PeriodicalId":384081,"journal":{"name":"15th Annual Conference of IEEE Industrial Electronics Society","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125280664","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 : 1989-11-06DOI: 10.1109/IECON.1989.69615
T. Kawahara, T. Shimizu, M. Shioya, G. Kimura
In a high-frequency induction heating system with a operating frequency ranged over megahertz, the wiring between the voltage-fed-type inverter and a parallel LC resonant load circuit causes the deterioration of the electric power transmission characteristics. To solve this problem, the authors have developed a power transmission method using the distributed constant line (DCL) with 1/4 length of the wavelength determined by LC resonant frequency. The line is connected between the voltage-fed-type inverter and a parallel LC resonant load circuit. However, when the load is placed near the inverter set, this method is not as cost-effective because of the high expense and long length of the DCL. The authors studied a novel method with the LC lumped constant circuit replacing the DCL for transmission of high-frequency electric power ranged over megahertz. Experimental results indicate that the waveform of the inverter output current is approximately sinusoidal with a small amount of high harmonics, which is smaller than the result obtained with the DCL.<>
{"title":"High frequency power transmission by lumped constant circuit replaced distributed constant line","authors":"T. Kawahara, T. Shimizu, M. Shioya, G. Kimura","doi":"10.1109/IECON.1989.69615","DOIUrl":"https://doi.org/10.1109/IECON.1989.69615","url":null,"abstract":"In a high-frequency induction heating system with a operating frequency ranged over megahertz, the wiring between the voltage-fed-type inverter and a parallel LC resonant load circuit causes the deterioration of the electric power transmission characteristics. To solve this problem, the authors have developed a power transmission method using the distributed constant line (DCL) with 1/4 length of the wavelength determined by LC resonant frequency. The line is connected between the voltage-fed-type inverter and a parallel LC resonant load circuit. However, when the load is placed near the inverter set, this method is not as cost-effective because of the high expense and long length of the DCL. The authors studied a novel method with the LC lumped constant circuit replacing the DCL for transmission of high-frequency electric power ranged over megahertz. Experimental results indicate that the waveform of the inverter output current is approximately sinusoidal with a small amount of high harmonics, which is smaller than the result obtained with the DCL.<<ETX>>","PeriodicalId":384081,"journal":{"name":"15th Annual Conference of IEEE Industrial Electronics Society","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126395658","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 : 1989-11-06DOI: 10.1109/IECON.1989.69687
J. Thomesse, T. Laine
The application layer services of a field bus are presented, starting from the end-user needs for distributed field database management. The authors summarize the main basic principles used in MAC and logical link layers and explain the services for the application layer and network management. They compare these services with the MMS ones, pointing out the main differences. The question of compatibility between field bus and MAP networks is considered.<>
{"title":"The field bus application services","authors":"J. Thomesse, T. Laine","doi":"10.1109/IECON.1989.69687","DOIUrl":"https://doi.org/10.1109/IECON.1989.69687","url":null,"abstract":"The application layer services of a field bus are presented, starting from the end-user needs for distributed field database management. The authors summarize the main basic principles used in MAC and logical link layers and explain the services for the application layer and network management. They compare these services with the MMS ones, pointing out the main differences. The question of compatibility between field bus and MAP networks is considered.<<ETX>>","PeriodicalId":384081,"journal":{"name":"15th Annual Conference of IEEE Industrial Electronics Society","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130424481","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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