In this paper, the authors propose and investigate a FEM assisted position and speed observer for brushless d.c. PM motor drive sensorless control, based on the line-to-line PM flux linkage estimation. The line-to-lin...
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In this paper, the authors propose and investigate a FEM assisted position and speed observer for brushless d.c. PM motor drive sensorless control, based on the line-to-line PM flux linkage estimation. The line-to-line PM flux may be estimated using measured currents and line-to-line voltages. The zero-crossing of the line-to-line PM flux linkage occurs right in the middle of two commutation points. The time period from one commutation point to zero-crossing is equal with the time period from zero-crossing to the next commutation point, at constant or slowly varying speed. This is used as a basis for the position and speed observer. For performance applications, in the present paper, the position between commutation points is obtained by comparing the estimated line-to-line PM flux with a look-up table, which contains the position versus FEM calculated line-to-line PM flux. A simulation model and experimental results are shown, demonstrating the reliability of FEM assisted position and speed observer for BLDC PM motor.
This paper suggests a new stability analysis approach dedicated to a class of fuzzy control systems controlling multi input-multi output (MIMO) nonlinear processes by means of Takagi-Sugeno fuzzy logic controllers. Th...
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This paper suggests a new stability analysis approach dedicated to a class of fuzzy control systems controlling multi input-multi output (MIMO) nonlinear processes by means of Takagi-Sugeno fuzzy logic controllers. The approach is based on LaSalle's global invariant set theorem, and an original stability theorem offers sufficient stability conditions. The applicability and efficiency of the theoretical results are illustrated by a MIMO case study dealing with the fuzzy control of a spherical three tank system.
This paper deals with utilization possibility of a kinematical couple of screw-matrix in minimachine mechatronic concept which is assigned to move within the pipes having less than 25 mm of the inner diameter. The pri...
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This paper deals with utilization possibility of a kinematical couple of screw-matrix in minimachine mechatronic concept which is assigned to move within the pipes having less than 25 mm of the inner diameter. The principle of the movement for a straightforward motion consists in transformation of the actuator rotary movement through a screw and a nut to the linear motion. It causes a change of distance between the front and rear parts of the minimachine modules. Due to minimization of the dimensions, the electrical control and power supply components are placed outside of the minimachine operating area. The control module is based on a programmable integrated circuit （PIC）.
In the paper, an uncertainty analysis and simulation of a robust control of temperature fields of the casting mould in the benchmark casting plant are presented. Temperature fields are supposed as distributed paramete...
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Robots and other intelligent systems in human environment need high-level cognitive capabilities to enable the achievement of complex goals in complex environments using limited computational resources. Robotic cognit...
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ISBN:
(纸本)9781617825583
Robots and other intelligent systems in human environment need high-level cognitive capabilities to enable the achievement of complex goals in complex environments using limited computational resources. Robotic cognitive capabilities include attention allocation, planning, perception processing, reasoning about the other agents and the environment. This paper presents an approach for safe robot controlling using the Intelligent Space. In the iSpace networked distributed sensors observe and gather information from the space. In this environment mobile robots can be tracked with ultrasonic positioning system, the topological map can be build using laser range finders and other properties of the space can be recognized. The recognized properties of the space and the mobile code technology make it possible to extend the control framework of mobile robots with components in a safe way. The mobile code is a program-component obtained from a remote system, transferred across a network and dynamically downloaded and executed on the robots. This code is created, verified, stored and transmitted to the robot using the Certified Proved-Property-Carrying Code architecture, where properties and their proofs also attached to the code. The receiver can verify the proofs and it can decide whether to use or to refuse the received mobile component.
In the paper, a robust control of temperature fields of the casting mould in the benchmark casting plant is presented. Temperature fields are represented as distributed parameter systems with dynamic models in the for...
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The paper presents new research directions both for 3D internet and cognitive info-communication. It reviews basic concepts and definitions and gives some "historical" view that helps to understand current i...
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The paper presents new research directions both for 3D internet and cognitive info-communication. It reviews basic concepts and definitions and gives some "historical" view that helps to understand current international trends and projects. Some examples of our experimental results are also presented.
In this mini-tutorial some advanced engineering methods are presented for modeling and design of discrete-time control of distributed parameter systems described for control purposes by numerical structures over compl...
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The computerized modeling of cognitive visual information has been a research field of great interest in the past several decades. The research field is interesting not only from a biological perspective, but also fro...
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ISBN:
(纸本)9781617825583
The computerized modeling of cognitive visual information has been a research field of great interest in the past several decades. The research field is interesting not only from a biological perspective, but also from an engineering point of view when systems are developed that aim to achieve similar goals as biological cognitive systems. This paper briefly describes a general framework for the extraction and systematic storage of low-level visual features, and demonstrates its applicability in image categorization using a linear categorization algorithm originally developed for the characterization of text documents. The performance of the algorithm together with the newly developed feature array was evaluated using the Caltech 101 database. Extremely high (95% and higher) success rates were achieved when distinguishing between pairs of categories using independent test images. Efforts were made to scale up the number of categories using a hierarchical, branch-and-bound decision tree, with limited success.
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