Research Pages

Welcome to my research pages.

1. Papers

1.1. Conference Papers

Dehaeze, T., Mattenet, M. M., & Collette, C., Sample Stabilization For Tomography Experiments In Presence Of Large Plant Uncertainty, In MEDSI’18 (pp. 153–157) (2018). Geneva, Switzerland: JACoW Publishing
Dehaeze, T., Vermat, M., & Christophe, C., Complementary filters shaping using \(H_\infty\) synthesis, In 7th International Conference on Control, Mechatronics and Automation (ICCMA) (pp. 459–464) (2019)
Dehaeze, T., & Collette, C., Active damping of rotating platforms using Integral Force Feedback, In Proceedings of the International Conference on Modal Analysis Noise and Vibration Engineering (ISMA) (2020)
Dehaeze, T., Bonnefoy, J., & Collette, C., Mechatronics approach for the development of a Nano-Active-Stabilization-System, In MEDSI’20 (2021). JACoW Publishing
Brumund, P., & Dehaeze, T., Multibody simulations with reduced order flexible bodies obtained by FEA, In MEDSI’20 (2021). JACoW Publishing

1.2. Journal Papers

Verma, M., Dehaeze, T., Zhao, G., Watchi, J., & Collette, C., Virtual sensor fusion for high precision control, Mechanical Systems and Signal Processing, 150, 107241 (2020)
Verma, M., Lafarga, V., Dehaeze, T., & Collette, C., Multi-degree of freedom isolation system with high frequency roll-off for drone camera stabilization, IEEE Access, (2020)
Dehaeze, T., & Collette, C., Active damping of rotating platforms using integral force feedback, Engineering Research Express, (2021)

2. Useful Pages / Tutorials

2.1. General Mechatronics

Spectral Analysis

Basics of spectral analysis are presented alongside the Matlab codes. This includes:

power spectral density

cumulative power spectrum

noise budgeting

…

Bank of Filters using matlab

Several types of linear filters (low pass, high pass, notch, lead, etc.) are presented with the corresponding Matlab code.

2.2. System Modeling using Simscape

Finite Element Models with Simscape

Finite Element Models (FEM) can be included into Simscape Multi-Body models. This document presents how to do so.

Stewart Platforms modeled with Simscape

The goal of this project is to provide a Matlab/Simscape Toolbox to study Stewart platforms.

Manage Gravity within Simscape

Gravity can add some problems in multi-body simscape models: at the beginning of the simulation, some sag will be experience that may be unwanted. In order to start the simulation at equilibrium, few measured can be employed that are described in this document.

3. Test Benches / Experiments

3.1. Intrumentation Related

Voltage Amplifiers for Piezoelectric Actuators

Voltage amplifiers for capacitive loads (piezoelectric actuators) are measured in term of dynamics from input voltage to output voltage. Their output impedance are also measured.

Attocube

The Attocube (a fiber based interferometer) is tested. Its noise characteristics as well as non-linearities are measured.

3.2. Amplified Piezoelecric Actuator

Amplified Piezoelectric Actuator - Test bench and Finite Element Model

A test bench is used to characterise the performances of an Amplified Piezoelectric Actuator (APA). The dynamics of the system is identified and compared with a Finite Element Model (FEM).

Encoder in parallel with an Amplified Piezoelectric Actuator

An encoder is fixed in parallel with an amplified piezoelectric actuator. The transfer function from the actuator to the motions measured by the encoder is identified.

Piezoelectric Stack as Force Sensor

A part of a piezoelectric stack can be used as a force sensor. Then, the force sensors is collocated with the part of the stack used as an actuator and Integral Force Feedback control strategy can be used to add damping in the system. This is performed on an Amplified Piezoelectric Actuator

Sensor Fusion of Inertial Sensors

A geophone and a accelerometer are experimentally fused together using complementary filters. The goal is to form a super sensor that has better noise characteristics than the individual sensors.

3.3. Vibration Table

Instrumented Vibration Table used for Modal Testing

A vibration table is developed to perform controlled modal tests.

4. PhD Project - Nano Active Stabilization System

4.1. General Reports

NASS - Report 2020

General report on the NASS project made in 2020.

4.2. Measurements, Models and Test Benches

NASS - Micro Station Measurements

This document gathers all the measurements made on the Micro-Station.

NASS - Simscape Model

This document presents the Simscape model used to represent the micro-station as well as the Nano Active Stabilization System.

NASS - Finite Element Models

Finite Element Models of the nano-hexapod are developed and used with Simscape to perform dynamics meaurements. In this document, models of Amplified Piezoelectric Actuators, Flexible Joints, and Entire Stewart platform’s strut are developed and tested.

NASS - Metrology Concept 1