Publicaties
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Real-time energy-efficient actuation of induction motor drives using approximate dynamic programming Universiteit Gent
This article proposes a real-time control strategy for induction motor drives, harmonizing accurate torque, and flux tracking with energy efficiency. Common problems related to lengthy control horizons and the associated computational burden are dealt with by introducing a value function approximation in the model-predictive structure to quantify the impact of instantaneous decisions on future states. An augmented model of the drive is ...
A system identification procedure for multibody system dynamics Universiteit Gent
The governing equations of multibody system dynamics are discovered directly from time-series datasets of a given mechanism using an evolutionary symbolic sparse regression approach without any prior knowledge of the respective mechanism. For the discovery of physical models, a dictionary of basis functions is used, a risk of which is that the dictionary is not large enough to discover the physical laws. This risk is mitigated by following an ...
Improving torque in a magnetic resonance based motoring system by detuning from resonance Universiteit Gent
Resonant wireless power transfer (RWPT) allows for efficient transfer of electrical energy over an air gap, by optimally tuning a receiver resonator. Next to transferring electrical energy to supply or charge a device, previous work demonstrated that the induced current in receiver resonators can be directly applied to exert mechanical torque on a rotor axle. The peak torque however only occurs when both receiver coils are uncoupled because the ...
Rotor temperature virtual sensing for induction machines using a lumped-parameter thermal network and dual Kalman filtering Universiteit Gent
Exploiting bidirectional power flow control to capture wind gust power in small and medium wind turbines Universiteit Gent
Among renewable energy sources, wind energy is one of the most promising ones. However, small and medium wind turbines need to cope with the natural intermittent nature of wind speed at lower altitudes. This imposes challenges on optimally tracking the Maximum Power Point (MPP) of the turbine. Up to now, various MPPT techniques have been proposed. However, most of these algorithms have poor performances in gusty weather conditions exhibiting ...
Impact of fast wind fluctuations on the profit of a wind power producer jointly trading in energy and reserve markets Universiteit Gent
In light of the latest technological achievements in wind farm control, wind power producers (WPPs) are motivated to participate in the joint day-ahead energy and reserve market (JERM) so as to obtain additional revenue by offering ancillary services. However, their expected profit is potentially affected by fast fluctuations of the available wind power in real-time, which may prevent them to deliver the capacity offered at the day-ahead stage. ...
Comparison of collision detection techniques for high-speed industrial robot actuators with overload clutch Universiteit Gent Vrije Universiteit Brussel
High-speed industrial robots can cause severe damage in the event of a collision. In order to deploy them in unstructured environments, they require overload protection and sensitive collision detection. A qualitative and quantitative comparison of different detection techniques is presented based on high-speed collision experiments. A high-speed industrial robot actuator with overload clutch was instrumented with various sensors for this ...
Data-driven prognostics of alternating current solenoid valves Universiteit Gent
Solenoid valves are critical components in many process control systems, as their failure is often a root cause for plant shutdowns. Therefore, the ability to predict the remaining useful life (RUL) of solenoid valves is highly desirable. In this paper, a novel data-driven RUL prediction methodology for solenoid valves is proposed, by training deep neural networks on images constructed from raw current signatures. The performance is compared to ...
Toward a comprehensive impossibility result for string stability Universiteit Gent
We provide a comprehensive impossibility result toward achieving string stability, i.e., keeping local relative errors in check with local controllers independently of the size of a chain of subsystems. We significantly extend the existing results, from the linear time-invariant (LTI) setting to any homogeneous controllers that can be nonlinear, time varying, and locally communicating. We prove this impossibility for a set of definitions with ...