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 9 of 9 for “"Torque estimation"”.
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Torque estimation in permanent magnet synchronous machines
El uso de máquinas síncronas de imanes permanentes ha aumentado notablemente en aplicaciones industriales y de tracción eléctrica durante las últimas décadas, debido a su mejor comportamiento sobre otros tipos de motores eléctricos en aspectos clave como son la densidad de potencia, densidad de …
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Modeling and Analysis of a Thermospheric Density Measurement System Based on Torque Estimation
… a satellite. The Satellite Producing Aerodynamic Torque to Understand LEO Atmosphere (SPATULA) concept was introduced as an alternative method, which infers density based on measurements of the drag torque. In the rotational regime, drag produces the strongest torque at LEO altitudes by far, …
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Torque Accuracy Improvement Via Explicit Torque Feedback Control For Internal Combustion Spark Ignition Engines
<p>At the present time, both control and estimation accuracies of engine torque are causes for under-achieving optimal drivability and performance in today’s production vehicles. The major focus in this area has been to enhance torque estimation and control accuracies using existing open-loop …
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Estimating output torque via amplitude estimation and neural drive : a high-density sEMG study
… thesis presents an exploration of output joint torque estimation using high density surface electromyography (HDsEMG). The specific aims of this thesis were to implement a well-established amplitude estimation method for standard multi-electrode sEMG collection with an HDsEMG grid, and to take …
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Vehicle model-based filtering for spacecraft attitude determination
… to include rigid body effects and disturbance torques. When rate sensing gyroscope measurement error components are large, as is anticipated in the new generation of micromechanical inertial sensors, the model-based approach provides superior performance to the standard kinematic designs. The …
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Influence of pH and protein ChePep on motility of Helicobacter pylori
… by Dr. C. Su of the Bansil lab were analyzed and torque was calculated using resistive force theory (RFT). The results indicated that decreasing pH leads to decreased fraction of motile trajectories and mainly impacts the high end of distributions of swimming speeds and length of trajectories. At …
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Towards Efficient Hydraulic Manipulator Control using Learning-Based Model Predictive Control
… an outer-loop position controller and inner-loop torque controller. The torque controller was validated on the system, though hardware constraints limited the controller bandwidth. Differential evolution algorithm was leveraged to optimize a dynamics regression trajectory. A PD feedback controller …
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Synchroniser analysis and shift dynamics of powertrains equipped with dual clutch transmissions
… model. Results illustrate that accuracy of torque estimation, time delay in engine and clutches, and torque balance in the powertrain all influence the shift quality. Powertrain transient studies have been carried out to investigate the impact of multiple nonlinearities on powertrain …
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Actuator Optimization and Control of Pediatric Knee Exoskeleton for Community-based Mobility Assistance: More Lightweight, More Affordable, and More Stable
… growth. Moreover, exoskeletons typically use the torque sensor or spring mechanics as exteroceptive feedback, but these torque sensing methods not only lead to extra cost and mass but also cause a small range of stable controller gains.</p> <p>To facilitate pediatric exoskeleton in community …