This paper presents the design of an active surveillance system consisting of an intelligent-controller and two video cameras (one with a fixed wide field of view and the other with a narrow moveable field of view). T...
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This paper presents the design of an active surveillance system consisting of an intelligent-controller and two video cameras (one with a fixed wide field of view and the other with a narrow moveable field of view). The controller, which is implemented within a single Altera FLEX 10K device, combines the functions of image capture and display, motion detection, background image update and control of the moveable camera. Correct functionality of the controller chip has been verified by simulation.
In this paper, an efficient power electronic circuit simulation approach is discussed for a digitally controlled three phase active PFC converter system. The control circuit simulation software used in this simulation...
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ISBN:
(纸本)0852967047
In this paper, an efficient power electronic circuit simulation approach is discussed for a digitally controlled three phase active PFC converter system. The control circuit simulation software used in this simulation technique is also applied to the digital signal processor (DSP) based control implementation of a practical power factor correction (PFC) power conversion circuit with a digital control scheme. This circuit simulation technique is based on a circuit equation modeled by substituting control input dependent time-varying resistors in place of all the power switches incorporated in the bridge arms of the three phase active PFC converter circuit and system treated here, one,state-vector equation described by state-variables for inductors and capacitors, together with an algebraic computation method to transform the matrix of the circuit equation into matrix of the state vector equation. In addition, this paper proves the effectiveness of a voltage-fed three phase PFC converter with a digital control PWM strategy and its performance evaluations on the basis of computer-aided simulation results together with experimental results.
In recent years there has been considerable interest in applying sensor array signal processing techniques to a variety of radar applications. The use of adaptive spatial and temporal filtering techniques has been wid...
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In recent years there has been considerable interest in applying sensor array signal processing techniques to a variety of radar applications. The use of adaptive spatial and temporal filtering techniques has been widely discussed. The relative expense of building hardware and conducting experiments has led to a strong emphasis on simulation as a way of developing new equipment, but there are currently no software tools available that are particularly suited to the problems of simulating sensor array systems. This paper describes the current state of development of an adaptive array processing toolset (AdAPT) (1), which is capable of modelling systems comprising large numbers of sensors. AdAPT encompasses modelling a target environment, design of array hardware, application and design of signal processing algorithms and the display and interaction of data as it flows through the design scenario. We also discuss the graphical user interface to AdAPT.
A PC platform based training simulator for personnel on anti-tank guided missile (ATGM) systems has been designed and implemented as a complex system which is controlled by instructor-trainee interaction. It makes use...
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A PC platform based training simulator for personnel on anti-tank guided missile (ATGM) systems has been designed and implemented as a complex system which is controlled by instructor-trainee interaction. It makes use of objectorientedsimulation modelling, 6DOF missile model and mask modelling of terrain and weather conditions. To cope with the system complexity, both a modular designs of the system and its subsystems is adopted, and an object-oriented programming is applied. A fully elaborated set of compatible models and respective software implementations for missile and moving ground target involving their interrelated kinematics has been developed. An appropriate user-system interface has been designed to enhance instructor-trainee co-operation. It is aimed both for simulation studies of anti-tank combat (ATC) using command-to-line-of-sight (CLOS) guided missiles and for training operators of such systems. An implemented hardware-in-the-loop (HIL) element in the system is the real guidance system. Sample results for an experimental session with real-world data and situation are given.
The design of a rotor time constant optimiser for a rotor flux oriented vector controlled drive has been shown. The SIMULINK simulation tool has been used to verify and test the initial design before producing code fo...
The design of a rotor time constant optimiser for a rotor flux oriented vector controlled drive has been shown. The SIMULINK simulation tool has been used to verify and test the initial design before producing code for the drive. This reduces the development time because the algorithm can be tested in an environment where unwanted secondary effects can be ignored and changes can be made quickly and easily.
High performance drive applications require fast torque response. Modern advances in brushless AC drives have produced controllers combining good steady state performance with excellent transient behaviour. This is po...
High performance drive applications require fast torque response. Modern advances in brushless AC drives have produced controllers combining good steady state performance with excellent transient behaviour. This is possible with vector control (also termed field oriented, flux vector, etc.). This paper avoids a heavily mathematical treatment and instead gives an appreciation of the basic concepts, comparing the behaviour of an induction machine drive with vector control to that given with other methods of control, here termed scalar control. A versatile simulation package is used to contrast the behaviour, since the differences in behaviour under idealised conditions is extremely helpful in aiding understanding. Some fundamental ideas are first reviewed, such as DC drives and conventional scalar control, with a specific example of the induction motor dynamic performance being given, before vector control is introduced.
There has been considerable interest in applying sensor array signal processing techniques to a variety of radar applications. The use of adaptive spatial and temporal filtering techniques has been widely discussed. T...
There has been considerable interest in applying sensor array signal processing techniques to a variety of radar applications. The use of adaptive spatial and temporal filtering techniques has been widely discussed. The relative expense of building hardware and conducting experiments has led to a strong emphasis on simulation as a way of developing new equipment, but there are currently no software tools available that are particularly suited to the problems of simulating sensor array systems. This paper describes the current state of development of an adaptive array processing toolset (AdAPT), which is capable of modelling systems comprising large numbers of sensors. AdAPT encompasses modelling a target environment, design of array hardware, application and design of signal processing algorithms and the display and interaction of data as it flows through the design scenario. We also discuss the graphical user interface to AdAPT.
This paper presents the design of an active surveillance system consisting of an intelligent controller and two video cameras (one with a fixed wide field of view and the other with a narrow moveable field of view). T...
This paper presents the design of an active surveillance system consisting of an intelligent controller and two video cameras (one with a fixed wide field of view and the other with a narrow moveable field of view). The controller, which is implemented within a single Altera FLEX 10 K device, combines the functions of image capture and display, motion detection, background image update and control of the moveable camera. Correct functionality of the controller chip has been verified by simulation.
Because a large scale hydropower station simulator in our laboratory has its special functional requirement that simulation be all generating sets oriented, all generating processes oriented, and whole zone of station...
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ISBN:
(纸本)0852969120
Because a large scale hydropower station simulator in our laboratory has its special functional requirement that simulation be all generating sets oriented, all generating processes oriented, and whole zone of station oriented, modeling for a large scale hydropower station simulator has its characteristics in addition to general simulator modeling characteristics. We have used objectoriented methodology in modeling for this large scale hydropower station simulator and have obtained satisfactory results in some degree. The architecture of modeling for this simulator will be presented in this paper.
A new approach is proposed to use objectoriented techniques and improved genetic algorithms in developing software to design, simulate and model an excitation control system. An example will be used to illustrate the...
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ISBN:
(纸本)0852969120
A new approach is proposed to use objectoriented techniques and improved genetic algorithms in developing software to design, simulate and model an excitation control system. An example will be used to illustrate the feasibility of this approach. The excitation control system is modelled by using both a three-phase representation and transfer function approach. The thyristor exciter offers possibilities for improving dynamic/transient performance.
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