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 12 of 12 for “"virtual sensor"”.
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Virtual Sensor Middleware: A Middleware for Managing IoT Data for the Fog-Cloud Platform
… challenging, especially when applications access sensor data since IoT devices use different communication protocols. The existing IoT architectures address some of these challenges. This thesis proposes an IoT Middleware that provides applications with the abstraction required of IoT devices …
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Virtual sensor for air mass flow measurement in an SI engine: Application of distributed lumped modelling in prediction of air mass flow into the cylinder of SI combustion engines
… amount of mathematical assumptions and also sensor errors and as a result the mapping and calibration process of a new engine family takes approximately 2 years due to extensive modelling and testing required overcoming the above drawbacks. To improve this, the distributed lumped modelling …
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Modelling and prediction of tire-rim slip with finite element analysis
… design and training of a neural network-based virtual sensor for the prediction of tire-rim slip based on the parameters with significant effects. Two important findings were that tire-rim slip was higher on the soft soil than on the hard surface, and that the longitudinal wheel speed had …
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ANC of UAS Rotor Noise using Virtual Error Sensors
… noise control (ANC) systems rely on a physical sensor to measure the error signal at the desired location of attenuation. The error signal is then used to update an adaptive controller, which ultimately attenuates the measured response. However, it is not always practical to use traditional ANC …
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Operational Modal Analysis of Rolling Tire: A Tire Cavity Accelerometer Mediated Approach
… Tire Cavity Accelerometer (TCA) and two optical sensors in a tire on drum setup with cleat excitation to characterize dynamics of tread vibration in an appreciably easier, time and cost-effective approach. In this approach, First, the TCA vibration signal in a single test run is clustered into …
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Current based condition monitoring of electromechanical systems. Model-free drive system current monitoring: faults detection and diagnosis through statistical features extraction and support vector machines classification.
… off times. The author proposes a model free sensor-less monitoring system, where the only monitored signal is the input to the induction motor. The thesis considers different methods available in literature for condition monitoring of induction motors and adopts a simple solution that is …
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Moisture effects on the mechanical behavior of flexible pavement subgrades
… in order to predict permanent deformation. The virtual sensor experimental method is presented and used to build profile and contour cross sections of strain and stress. Comparing the stress and-strain figures in the vertical direction to those in the longitudinal and transverse directions it is …
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Design and Implementation of QCM Virtual Sensing Schemes for Analyses of Volatile Organic Compounds
Sensor arrays have evolved as powerful approaches for providing detection and discrimination of volatile organic compounds (VOCs) as required across numerous analytical applications. Such systems typically comprise a number of cross reactive sensor elements, which generate analyte specific response …
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An Assessment of 3D Tracking Systems and Lidar Data for RPO Simulation
… operation simulation to be tested with physical sensors and hardware, in order to assess the fidelity and performance of low-cost off-the-shelf systems for a hardware-in-the-loop testbed. With the push towards complex autonomous rendezvous missions, a low barrier to entry spacecraft simulator …
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Active fault-tolerant control of nonlinear systems with wind turbine application
… integral observer (PPIO); T-S fuzzy virtual sensor (VS) based AFTC; T-S fuzzy Dynamic Output Feedback Control TSDOFC; T-S observer-based feedback control; Sliding Mode Control (SMC). The theoretical concepts have been applied to an offshore wind turbine (OWT) application study. The …
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Fault Detection And Diagnosis For Air Conditioners And Heat Pumps Based On Virtual Sensors
… monitoring and diagnostic system with low cost sensors for air conditioning and heat pump equipment. Automated fault detection and diagnostics (FDD) has the potential for improving energy efficiency along with reducing service costs and comfort complaints. To achieve this goal, virtual sensors …
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A Fast-Response Odor Chromatographic Sniffer (FOX)
This thesis in microscale gas chromatography (μGC) creates a paradigm shift in rapidly analyzing chemicals in the environment or analytes. We are looking for unexpected chemical changes that have been added purposefully or unintentionally. The work examines various aspects of μGC technology, …