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- Algebraic splines (1)
- Brushless rotating machines (1)
- Clustered network (1)
- Data smoothing (1)
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- Interpolation (1)
- Kalman filtering (1)
- Mobile ad hoc networks (MANETs) (1)
- Motor drives (1)
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- Node distribution (1)
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- Permanent-magnet motors (1)
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- Splines (1)
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Articles 1 - 6 of 6
Full-Text Articles in Engineering
Power-Stepped Protocol: Enhancing Spatial Utilization In A Clustered Mobile Ad Hoc Network, Chansu Yu, Kang G. Shin, Ben Lee
Power-Stepped Protocol: Enhancing Spatial Utilization In A Clustered Mobile Ad Hoc Network, Chansu Yu, Kang G. Shin, Ben Lee
Electrical and Computer Engineering Faculty Publications
While most previous studies on mobile ad hoc networks (MANETs) rely on the assumption that nodes are randomly distributed in the network coverage area, this assumption is unlikely to hold, as nodes tend to be cluttered around hot spots like the site of an accident or disaster. We refer to this as a clustered layout. Intuitively, a MANET with the clustered layout may suffer from serious performance degradation due to the excessive collisions in congested hot spots and space underutilization of sparse areas. In this paper, we propose a power-controlled network protocol, called the power-stepped protocol (PSP), that maximizes the …
Satellite Attitude Control System Design Using Reaction Wheels, Bhanu Gouda, Brian Fast, Daniel J. Simon
Satellite Attitude Control System Design Using Reaction Wheels, Bhanu Gouda, Brian Fast, Daniel J. Simon
Electrical and Computer Engineering Faculty Publications
No abstract provided.
Controller Tuning For Dc Motor Speed Control Using Genetic Algorithms, Saurabh Jain, Daniel J. Simon
Controller Tuning For Dc Motor Speed Control Using Genetic Algorithms, Saurabh Jain, Daniel J. Simon
Electrical and Computer Engineering Faculty Publications
No abstract provided.
Kalman Filtering With Uncertain Noise Covariances, Srikiran Kosanam, Daniel J. Simon
Kalman Filtering With Uncertain Noise Covariances, Srikiran Kosanam, Daniel J. Simon
Electrical and Computer Engineering Faculty Publications
In this paper the robustness of Kalman filtering against uncertainties in process and measurement noise covariances is discussed. It is shown that a standard Kalman filter may not be robust enough if the process and measurement noise covariances are changed. A new filter is proposed which addresses the uncertainties in process and measurement noise covariances and gives better results than the standard Kalman filter. This new filter is used in simulation to estimate the health parameters of an aircraft gas turbine engine.
Synchronous Motor Phase Control By Vector Addition Of Induced Winding Voltages, Daniel J. Simon, Dennis L. Feucht
Synchronous Motor Phase Control By Vector Addition Of Induced Winding Voltages, Daniel J. Simon, Dennis L. Feucht
Electrical and Computer Engineering Faculty Publications
We propose a simple low-cost approach to the winding-sensed control of three-phase synchronous permanent-magnet motors. Our approach results from a straightforward but elegant application of vector-based motor theory. The method therefore does not depend on the differential equations that describe the motor dynamics, and it does not depend on the particular motor parameters. The single method we derive applies to both wye- and delta-configured motors. We vectorially sum the voltage waveforms at the motor terminals in a certain way and use their zero crossings to produce a correctly phased six-step switch sequence. We discuss the implementation for both wye- and …
Data Smoothing And Interpolation Using Eighth-Order Algebraic Splines, Daniel J. Simon
Data Smoothing And Interpolation Using Eighth-Order Algebraic Splines, Daniel J. Simon
Electrical and Computer Engineering Faculty Publications
A new type of algebraic spline is used to derive a filter for smoothing or interpolating discrete data points. The spline is dependent on control parameters that specify the relative importance of data fitting and the derivatives of the spline. A general spline of arbitrary order is first formulated using matrix equations. We then focus on eighth-order splines because of the continuity of their first three derivatives (desirable for motor and robotics applications). The spline's matrix equations are rewritten to give a recursive filter that can be implemented in real time for lengthy data sequences. The filter is lowpass with …