Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 14 of 14 for “"delay compensation"”.
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Hybrid PWM Update Method for Time Delay Compensation in Current Control Loop
… the effect of the one-step control time delay Td one without losing the full duty cycle range. Without the Td one to cause linear phase shifts that limit the control bandwidth and affect closed-loop stability, a very high quality digital current control can be achieved, such as a high …
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Novel methods for enhancing accuracy and stability of power hardware-in-the-loop simulations
… its stability and accuracy performance.;Time delay is proven to be a critical limiting factor for PHIL simulations. Appropriately, a characterisation methodology for the time delay present within PHIL has been established, by which individual identification of time delay sources as well as …
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Synchronized Measurement of Machine Rotor Angle and Its Application
… makes bad data detection and communication delay compensation possible.
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Optimal digital filter design for dispersed signal equalization
… ionosphere results in a frequency dependent time-delay of the signal frequency components. This effect of the medium on the signal is termed dispersion, and it increases the difficulty of pulse detection. A system capable of compensating for the dispersion would be desirable, as pulsed signals …
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Study on Zero Crossing Detection in CRM Totem-pole PFC Converter
… with zero-crossing detection are detection delay and noise immunity. A delay in turning off the synchronous switch due to ZCD delay results in a large negative current and an overall increase in ripple current, reducing efficiency. ZCD delay is also variable, as it depends on the operating …
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A subsampling delta-sigma modulator for global navigation satellite systems
… jitter and alias suppression and excess loop delay compensation to improve the dynamic range, thus enabling the modulator to be utilized in subsampling receivers when a relatively low sampling rate is desired. Based on the novel CT-ΔΣ modulator, this thesis also proposes a subsampling receiver …
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Array Signal Processing for Communications from High Altitude Platforms and Other Applications
… angle-separation of signals for accurate time-delay compensation. The OFDM signals from different directions are linearly combined after Doppler compensation and channel equalization. An adaptive Doppler filter is applied in frequency domain for removing residual intersymbol interference. The …
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Control and Time Integration Algorithms for Real-Time Hybrid Simulation
… to accurately compensate for a time-varying delay in RHS, online delay estimation methods were proposed and discussed based on a simplified actuator model. The model, consisting of a static gain and dead time, results in nonlinear relationships among different displacements. The estimation …
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Continuous-Time Delta-Sigma Modulators for Wireless Communication
… improved robustness against variations in loop delay. An RZ pulse, centered in the clock period, is used in the innermost feedback path which has the highest sensitivity to loop delay, while NRZ pulses are adopted in the outer feedback paths to reduce the sensitivity to clock jitter and lower …
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Improveing F-beta Score in Classifying Shark Data into Shark Behaviors
… Average (EA) based low-pass filtering, filter delay compensation, overlap windowing, and <em>k</em>-fold cross validation. For example, the average F-beta scores showed that applying EA-based low-pass filters (LPF) on the data, prior to machine learning and classification, improves Signal Power …
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Flexible Scheduling Methods and Tools for Real-Time Control Systems
… MPC, takes the effects of computational delay into account in the optimization. A scheduling scheme is also described, where the MPC cost functions being minimized are used as dynamic task priorities for a set of MPC tasks. The MATLAB/Simulink-based simulator TrueTime is presented. …
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Process control of a laboratory combustor using neural networks
… cluster is a neural network-based Smith time-delay compensator (NSTC) and is used to reduce the impact of the long sampling/analysis lags in the process. Unlike other neural network controllers reported in the control field, NMPC and NSTC are efficiently simple in terms of the network …
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Dynamic Shared State Maintenance In Distributed Virtual Environments
Advances in computer networks and rendering systems facilitate the creation of distributed collaborative environments in which the distribution of information at remote locations allows efficient communication. Particularly challenging are distributed interactive Virtual Environments (VE) that …