Research at the department ELEC

Overview Research Topics

The long term objective of the department is the realization of the IMMI project (Interpretation by Measuring, Modelling and Identification), since 1989. Beside this main project, which covers a broad spectrum of several related activities, also some other independent research topics (national or European funding) are at stake.

Identification of Hysteresis in Dynamic Systems

Hysteresis is a phenomenology commonly encountered in a wide variety of engineering and science disciplines, including solid mechanics, electromagnetism and aerodynamics. Most studies tackling hysteresis identification in the technical literature follow white-box approaches, i.e. they rely on...

Dealing with nonlinearities of industrial measurements

The project deals with the linearity measures of vibration testing techniques, when a physical prototype is available. The goal of the vibration testing is to obtain experimental data of the whole vibrating structure such as road and air vehicles [3]. Using these data it is possible to validate...

Nonparametric Time-Varying Operational Modal Analysis

The first subproject deals with the time variations of (vibrational) mechanical structures described by the nonparametric Operational Modal Analysis (OMA) [1]. OMA is a special identification technique for estimating the modal properties (e.g. resonance frequencies, damping) of structures based...

BLA-based Design and Analysis of VCO-based Sigma-Delta Modulator

Nonlinear system theory is involved. The available theoretical frameworks depend on the assumed system properties and the applied signals. An example is the Volterra theory framework which uses a series expansion of the system’s behaviour around an operating point. This operating point can be...

Measuring nonlinear distortions: from test case to an F-16 Fighter

What are the similarities and differences between the behavior of a small vibrating test system and an F-16 fighter? To find it out, we compare measurements of the test system to measurements from the bolted connection of the wing and the missile of a F-16 Fighter Falcon from the Belgian air...

Identification methods for low-power sensors

The Internet of Things (IoT) will soon result in a huge number of smart devices with actuators, sensors, network connectivity and signal processing. The scientific objective is to extend the current state-of-the-art frequency identification methods to enable their use within low-cost, low power...

Optimal Input Design for Nonlinear Block Structured Systems

Designing a good experiment is an important step in the system identification process, since the quality of the estimated model strongly depends on the quality of the experiment data. One aspect of the experiment that can be optimized is the input signal that is used to excite the system.  The...

Data driven fast measurements

Measurement techniques have fundamental speed and accuracy limitations. The speed and precision of a measurement device used in monitoring and control tasks determines the quality of the available data, which in turn limits the accuracy of models derived from the data. In this project, we...

Identification of multiple reflections in high frequency structures

Necessity of identifying reflections is not only an interest for engineers working at high frequencies. Engineers from other societies such as geophysics, mine-field detections and civil engineering are also concerned about the reflections. While in these fields mainly identifying the positions...

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