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Showing 1 to 11 of 11 for “"gain margin"”.
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Nonlinear Control System Stability Metrics via A Singular Perturbation Approach
In this dissertation, Singular Perturbation Margin (SPM) and Generalized Gain Margin (GGM) are proposed as stability metrics for Linear Time-Invariant (LTI) systems, Linear Time-Varying (LTV) systems, Nonlinear Time-Invariant (NLTI) systems and Nonlinear Time-Varying (NLTV) systems, which are: (i) …
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AUTOMATIC TUNING OF PROCESS CONTROLLERS : PRACTICAL APPROACHES
… analytical tuning formulas based on gain margin and phase margin are derived. These analytical formulas are particularly useful in the context of adaptive control and auto-tuning where the controller parameters have to be computed on-line. Unlike other analytical formulas, the desired …
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Torque Accuracy Improvement Via Explicit Torque Feedback Control For Internal Combustion Spark Ignition Engines
… The findings include an improvement of 14% in gain margin and 60% in phase margin when the torque feedback is applied to the cruise control torque request at the simulated operating point. This study demonstrates that the direct torque feedback is a powerful technology with promising results …
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Communication Protocol Design Considerations For Highway Vehicle Platoons And Enhanced Networked Robustness By Stochastic Dithers
… is introduced to enhance feedback robustness against</p> <p>communication gain uncertainties. The method employs a fundamental property in</p> <p>stochastic differential equations to add a scaled stochastic dither under which tolerable</p> <p>gain uncertainties can be much enlarged, beyond the …
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An application of robust H₂/H[infinity] control synthesis to launch vehicle ascent by Tyler Nicklaus Hague.
… create pitch control laws that provide 6 dB of gain margin and 302 of phase margin. The sensitivity and high-order of traditional H2/H [infinity] synthesis are addressed through the implementation of uncertainty in the design model and the application of balanced, model order reduction on the …
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Contributions to the dynamics of helicopters with active rotor controls
… of the helicopter and blade flexibility. The gain matrix is assumed to be fixed and computed off-line. The discrete elements of the HHC control loop are rigorously modeled, including the presence of two different time scales in the loop. By also formulating the coupled rotor-fuselage dynamics …
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Modeling and design of digital current-mode constant on-time control
… phase can be boosted. However, in this case, the gain margin requirement from the dynamic no-limit-cycle oscillation condition will make the further improvements on bandwidth impossible. In our design, the one sixth of the switching frequency is achieved.
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Applications of almost periodic functions and equivalent nonlinearities to identification and control of nonlinear systems
… system. The system is shown to hAve an effective gain margin once oscillations have been quenched. A typical point in this region is investigated and the three dimensional domain of stability for the system is presented,together with typical trajectories. The system is also shown to exhibit …
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Design, Modeling and Control of Bidirectional Resonant Converter for Vehicle-to-Grid (V2G) Applications
… and plug-in hybrid electric vehicles (PHEVs) are gaining popularity because they are more environmentally friendly, less noisy and more efficient. These vehicles have batteries can be charged by on-board battery chargers that can be conductive or inductive. In conductive chargers, the charger is …
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Spatially Resolved Analysis of Flame Dynamics for the Prediction of Thermoacoustic Combustion Instabilities
… to predictions of instability, validated against measurements in an unstable combustor. Both of these goals meet an existing practical need, providing a design tool for prediction of potential thermoacoustic instabilities in a combustor at the design stage.Measurements of the flame transfer …