Adaptive matrix integration for real-time simulation

Rahrooh, Alireza; Hartley, Tom T.

doi:10.1109/41.20340

Cited by 13 publications

(6 citation statements)

References 2 publications

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“…An option to solve the non-linear equations is to linearise the model and then use a technique which solves linear differential equations (Rahrooh, 1989). However using a linearised model does not give the accurate results for transient conditions, thus a technique which can solve non-linear DE's is sought.…”

Section: State Dependent Changesmentioning

confidence: 99%

CASED: A simulation package designed for variable speed drives

et al. 1991

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In recent years there has been an increase in the types and usage of AC variable speed drives. However, as the complexity of these systems has increased, so has the occurrence of problems which are often caused by the interaction of the various drive components. The authors have developed CASED which allows users to simulate complete drive systems. An overview is given of the types of models used for the converter and the motor, from which it is seen that three special features are required. Firstly the models are modular in nature, hence the simulator must be able to link the various models.Secondly a combination of discrete and continuous time simulation is required to model the converters, and lastly there may occasionally be a need for specialised stiff differential equation (DE) solvers. It is shown that by choosing the correct DE solver the simulation time can be decreased by more than one hundred fold. CASED has shown itself to be a specialised and powerful tool in variable speed drive analysis.

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Section: State Dependent Changesmentioning

confidence: 99%

CASED: A simulation package designed for variable speed drives

et al. 1991

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“…When the largest magnitude of the spurious roots is less than the magnitude of the principal root, the method is said to be relatively stable. Thus, the magnitude of the spurious roots must be less than the magnitude of the principal root for stable and accurate simulation (Rahrooh, 1990).…”

Section: Stability and Convergencementioning

confidence: 99%

“…Thus, it is possible to plot a root locus for varying values of A T. It is useful to observe that the root that is closest to ezT is the principal root as it is the exact mapping of the continuous time pole into discrete time. All the remaining roots are spurious roots as they are adding noise to the integration process (Rahrooh and Hartley, 1989).…”

Section: Stability and Convergencementioning

confidence: 99%

Analysis and Design of Digital Simulation via Control Theory

Rahrooh

1999

Journal of Vibration and Control

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It is critical that computer usage be integrated into assignments that involve the application of basic concepts in electrical engineering. Digital simulation of systems of first-order differential equations can be viewed as an appropriate use of the computer in simulation of physical systems. Some recent results demonstrating the usefulness of the control theory approach will be discussed to provide more insights into the problem of digital simulation. Then new techniques, based on estimation and adaptive filtering, will be presented and shown to be superior to other popular methods, especially for real-time simulation of physical systems.

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“…For the accurate and stable simulation, the value of h must be chosen so the product of λ m h lies within the relatively stable region of numerical integration, where λ m h is the magnitude of the largest pole of the transfer function 3,4 . The stable region of Euler's numerical integration routine is a unit circle that is centered at (-1 + j0) on the s-plane.…”

Section: Assemexe Accesses Thementioning

confidence: 99%

A Low-Cost Programmable Arbitrary Function Generator for Educational Environment

Fadaei

2013 ASEE Annual Conference &Amp; Exposition Proceedings

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This paper presents the design, implementation, and operation of a low-cost programmable arbitrary function generator intended for use as a plug-in board in a personal computer. Since a digital computer is used, capabilities such as programmability and signal recording are available with this system. Therefore, this instrument can generate any function of time that can be represented mathematically. The ability to generate arbitrary waveforms makes this instrument more versatile that an ordinary function generator that can produce only a few different waveforms. This design offers a significant advantage to educators in underdeveloped countries with limited resources to obtain a low-cost instrument that can be used in undergraduate laboratories where more expensive commercially arbitrary function generators are not available. One interesting application of this instrument is the synthesis of sound. If the equation for a particular sound is known, the sound can be produced when this function generator is connected to an audio amplifier and a speaker.

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Adaptive matrix integration for real-time simulation

Cited by 13 publications

References 2 publications

CASED: A simulation package designed for variable speed drives

CASED: A simulation package designed for variable speed drives

Analysis and Design of Digital Simulation via Control Theory

A Low-Cost Programmable Arbitrary Function Generator for Educational Environment

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