Bart Peeters

Bart Peeters
Siemens Industry Software · Test - Product Management

PhD Engineering Science

About

274
Publications
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Publications

Publications (274)
Article
Pre-test analysis is proposed as a methodology to design control strategies for environmental acoustic tests. In the space industry these tests are used to assess the survivability of hardware, which is exposed to harsh dynamic loads in service. In this work an array of loudspeakers and microphones is used in a laboratory to reproduce the acoustic...
Chapter
The industrial application of lightweight materials is increasing across many industries, which brings new challenges for efficient and reliable damage detection. The advancements of both machine learning (ML) algorithms and non-destructive testing (NDT) techniques offer the correct setting to successfully tackle these challenges. In this work, non...
Conference Paper
Full-text available
The industrial application of lightweight materials is increasing across many industries such as the automotive, the aerospace and the renewable energy sector. This growth brings new challenges for efficient and reliable damage detection. The advancements of both Machine Learning (ML) algorithms and Non-Destructive Testing (NDT) techniques offer th...
Article
Reliable and efficient damage detection is critical for the use of lightweight materials in the mechanical and aerospace industries. Within the context of Non-Destructive Testing (NDT), vibration-based tests have been applied for many decades to inspect components without damaging or debilitating their use. For posterior fault recognition, Artifici...
Conference Paper
In this work, wind turbine blade numerical models have been developed with two different finite element software-DTU Wind Energy HAWCStab2 with Timoshenko beam elements and MSC NASTRAN with solid elements. A correlation analysis has been performed comparing both of these models with experimentally measured data in order to validate the models. For...
Article
Full-text available
This paper introduces a user-friendly estimation framework for industrial measurements of vibro-acoustic systems with multiple inputs. Many mechanical structures are inherently nonlinear and there is no unique solution for modeling nonlinear systems. This is especially true when multiple-input, multiple-output (MIMO) systems are considered. This pa...
Conference Paper
Full-text available
Ground Vibration Testing (GVT) of aircraft is a measurement campaign performed in the development process of an aircraft, with the objective of obtaining experimental data of the aircraft to validate and update the structural dynamic models, which can in turn be used to predict important behavior, such as flutter. These measurements are usually car...
Chapter
Environmental tests are typically conducted in order to reproduce the operational response of a system. Non-realistic excitation mechanisms and mismatches between operational and test boundary conditions, represent relevant limitations of the currently adopted testing procedures. The Boundary Condition Challenge (BCC) addresses the assessment of a...
Chapter
Full-text available
Digital Image Correlation (DIC) is a non-contact full-field image analysis technique which allows to retrieve strains and displacements in three dimensions at the surface of any type of material and under arbitrary loading. In recent years, high-speed and high-resolution cameras have been developed for static as well as for dynamic applications. As...
Article
Full-text available
This paper addresses the problem of reproducing a random pressure field with an array of loudspeakers through direct field acoustic tests. Such field should be representative of the fairing interior acoustic levels generated by the dynamic loading during the launch of a spacecraft. The replication of the acoustic field with loudspeakers is highly d...
Article
Full-text available
This paper introduces a nonparametric, nonlinear system identification toolbox called SAMI (simplified analysis for multiple input systems) developed for industrial measurements of vibro-acoustic systems with multiple inputs. It addresses the questions related to the user-friendly (semi-)automatic processing of multiple-input, multiple-output measu...
Article
In multi-axis vibration control testing, the power required by the excitation system for replicating the user defined test specifications is a limiting factor which cannot be overlooked. Excessive power, on top of over-stressing the often expensive test equipment, could cause data acquisition overloads which inevitably interrupt the test even befor...
Article
Dynamic modelling is a core activity in mechanical engineering towards supporting system and control design. It is typically carried out in a computational environment, involving idealizing assumptions of diverse kinds. The most notable assumption commonly adopted in the field is the excitation-to-response linearity of the mechanical vibrations. Th...
Article
Full-text available
Multiple-Input Multiple-Output (MIMO) sine sweep is nowadays acknowledged to be one of the best excitation techniques for the modal testing of large aerospace structures, being an optimal solution in the tradeoff between high-quality FRFs testing time. Due to the test levels that can be reached during the sine sweeps and the increasing complexity a...
Conference Paper
The aim of this paper is to explore alternative ways to determine the vibration characteristics of wind turbine blades to reduce the amount and duration of needed tests without compromising the quality of the retrieved information. Applied test setup configuration, test specimen mounting and measurement equipment are known to affect the test result...
Conference Paper
Full-text available
Many mechanical structures are nonlinear and there is no unique solution for modeling nonlinear systems. When a single-input, single-output system is excited by special signals, it is easily possible to decide whether the linear framework is still accurate enough to be used, or a nonlinear framework must be used. However, for multiple-input, multip...
Chapter
Comfort plays a very important role in the development of cars. The pistons firing order of an internal combustion engine, by nature, do not generate a constant torque on the crankshaft. At specific crankshaft speed, where the engine’s excitation frequency and the driven-system’s natural frequency coincide, torsional vibrations can excite crankshaf...
Article
Full-text available
Digital Image Correlation (DIC) is a non-contact full-field image analysis technique which allows to retrieve strains and displacements in three dimensions at the surface of any type of material and under arbitrary loading. In recent years, high-speed and high-resolution cameras have been developed for static as well as for dynamic applications. As...
Article
In this paper, a new feature added to the MLMM modal parameter estimation method (Maximum Likelihood estimation of a Modal Model) will be introduced. The MLMM method tackles some of the remaining challenges in modal analysis, e.g. modal analysis of highly-damped cases where a large amount of excitation locations is needed such as the modal analysis...
Article
Full-text available
Modern wind turbine blades are being tested for certification purposes in accordance to the IEC-64100 standard. Part 23 of the norm details the requirements for the full scale structural testing of rotor blades. As a minimum, it requires measurement of the first and second flap wise and first edge wise natural frequencies. It lists damping and mode...
Conference Paper
Full-text available
This paper presents an efficient nonparametric time-varying (TV) system identification method for the Operational Modal Analysis (OMA) framework. OMA tackles industrial measurements of vibrating structures in real-life operating conditions without the exact knowledge of the excitation signal. The main issue is that the dynamics of underlying system...
Article
Full-text available
In this paper, a full Acoustic Modal Analysis (AMA) procedure to improve the CAE predictions of the car interior noise level is proposed. Some of the challenges that can be experienced during such an analysis are described and new solutions to face them are proposed. Particular AMA challenges range from the arrangement of the experimental setup to...
Article
During launch a spacecraft is subjected to a variety of dynamical loads transmitted through the launcher to spacecraft interface or air-born transmission excitations in the acoustic pressure field inside the fairing. As a result, spacecraft are tested on ground to ensure and demonstrate the global integrity of the structure against these loads, to...
Article
Multiple-Input Multiple-Output (MIMO) vibration control tests are able to closely replicate, via shakers excitation, the vibration environment that a structure needs to withstand during its operational life. This feature is fundamental to accurately verify the experienced stress state, and ultimately the fatigue life, of the tested structure. In c...
Article
Full-text available
This paper presents an efficient nonparametric time-varying time domain system identification method for the Operational Modal Analysis (OMA) framework. OMA tackles industrial measurements of vibrating structures in real-life operating conditions without the exact knowledge of the excitation signal. In case of time-varying Operational Modal Analysi...
Article
Full-text available
Rotating machines have always been used in a wide variety of industrial applications. Nowadays it is very difficult to find machines or mechanical systems which do not have any rotating component such as gears, bearings, shafts, wheels and so on. Wind turbines, gearboxes, combustion and electrical engines, generators and gas turbines are just few e...
Chapter
This chapter will introduce the concepts of Strain modal analysis, Strain frequency response function (SFRF), and strain mode shapes. The basic theory for strain-based modal analysis will be presented, using a test-based perspective. The similarities and differences between displacement-based modal analysis and strain-based modal analysis and their...
Conference Paper
Full-text available
Traditionally, modal parameters are experimentally extracted from FRFs measured in laboratory conditions. However, most of the real structures (e.g. bridges, in-flight testing of aircrafts) have to be tested in their real operational conditions rather than the laboratory conditions; this is called operational modal analysis (OMA). In OMA, the real...
Article
Full-text available
Interior sound measurements play an important role in vehicle development and refinement. Sometimes hundreds of microphones are installed in an automotive cabin. During test preparation and execution, a lot of time is spent in determining the microphone positions and in tracking cables to the data acquisition channel. A smart acoustic localization...
Conference Paper
Full-text available
Whereas the experimental identification of modal models of car bodies in white is a well-established process both on the level of measurement procedures and modal analysis, this is much less the case when dealing with trimmed car bodies. The high amount of damping necessitates the use of many excitation locations, which on its turn makes the identi...
Chapter
This paper considers a so-called “Mission Synthesis” procedure where a qualification test specification is derived for an electronic component (i.e., a VHF radio) mounted on a console inside a helicopter cockpit. The environmental vibrations, which are measured during various flight maneuvers, consist of deterministic sine tones superimposed on Gau...
Chapter
The paper addresses the methodologies required to derive a reliable and representative simulation environment for virtual shaker testing to predict the outcome of Spacecraft vibration tests numerically prior to its physical execution. The simulation environment needs to comprise the coupled dynamical models of the testing facility, structure under...
Chapter
In Random Vibration environmental testing, it is a common practice to specify the requirements as acceleration power spectral densities (PSDs) that need to be reproduced at user-defined control channels. Such a test is typically performed in a single-axis setting, where the test article is subjected to vibrations in one direction only. If more than...
Chapter
In this paper, the recently-developed MLMM method (Maximum Likelihood estimation of a Modal Model) will be introduced and applied to challenging industrial cases. Specific about the method is that the well-established statistical concept of maximum likelihood estimation is applied to estimate directly a modal model based on measured Frequency Respo...
Chapter
The Order-Based Modal Analysis (OBMA) technique shows to be very powerful for identifying the modal parameters in operational conditions in case of rotating machineries during transient operations. The main idea behind the method is that instead of estimating the spectra and apply Operational Modal Analysis (OMA) by using them, the so-called orders...
Conference Paper
Full-text available
This paper considers a so-called " Mission Synthesis " procedure where a qualification test specification is derived for an electronic component (i.e., a VHF radio) mounted on a console inside a helicopter cockpit. The environmental vibrations, which are measured during various flight maneuvers, consist of deterministic sine tones superimposed on G...
Article
Full-text available
This paper discusses the use of optical fiber Bragg grating (FBG) and piezo strain sensors for structural dynamic measurements. For certain industrial applications, there is an interest to use strain sensors rather than in combination with accelerometers for experimental modal analysis. Classical electrical strain gauges can be used hereto, but oth...
Conference Paper
Full-text available
In this paper, a full Acoustic Modal Analysis (AMA) procedure to improve the CAE predictions of the car interior noise level is proposed. Some of the challenges that can be experienced during such an analysis are described and new solutions to face them are proposed. Particular AMA challenges range from the arrangement of the experimental setup to...
Conference Paper
Full-text available
In engineering practice, there is a great interest to determine vibro-acoustic characteristics of structures by means of experimentally driven modal models. To make these modal models usable for the intended application, they have to verify some constraints defined by the modal theory (e.g. FRFs reciprocity, real mode shapes...). Rarely, modal para...
Conference Paper
Full-text available
This paper investigates a methodology which enables a time-and cost-efficient geometry definition, i.e. an automatic 3D localization of sensors in a dense mesh. The considered methodology consists of a distance measurement system using ultrasound tags, in combination with a 3D " Dense Mesh Localization algorithm ". To reach an high accuracy, the al...
Conference Paper
Full-text available
Experimental simulations of random vibrations are important for automotive and aerospace component testing. Shaker excitation signals are typically generated by applying the Inverse Fast Fourier Transform (IFFT) to the desired Power Spectral Density (PSD) profile in combination with randomized phase spectra. However, signals generated in this way w...
Article
Full-text available
Performing Multiple-Input Multiple-Output (MIMO) tests to reproduce the vibration environment in a user-defined number of control points of a unit under test is necessary in applications where a realistic environment replication has to be achieved. MIMO tests require vibration control strategies to calculate the required drive signal vector that gi...
Chapter
The FP7 European maintenance-on-demand (MoD) project aimed at increasing transport competitiveness by increasing the net operating time of a vehicle. The maintenance-on-demand scenario deals with the service planning optimization according to information on the remaining lifetime, the current operating environment or also the customer constraints....
Article
In this paper a vibration-based approach to identify a crack in a wind turbine blade is described and demonstrated numerically and experimentally. Operational modal analysis has been performed before and after a buckling test, and vibration data, gathered from some accelerometers placed along the blade, was used to monitor the integrity of the stru...
Article
Full-text available
During high level vibration test on a high mass specimen, the test engineer is often facing difficulty to pass properly the specified vibration level due to coupling between the specimen and the shaker. The present paper present a methodology to define a virtual shaker testing simulator. The first step involves the dynamic identification of a 80 kN...