Université de Neuchâtel

Application of Kalman filtering to noisereduction on microsensor signals = Application de filtres de Kalman à la réduction de bruitde microcapteurs

Marselli, Catherine ; Daudet, D. ; Amann, Hans Peter ; Pellandini, Fausto

In: Proceedings du Colloque interdisciplinaire en instrumentation, C2I, 18-19 novembre 98, pp. 443-450, 1998, p. 443-450

L'encombrement réduit et les coûts relativement bas des microcapteurs les rendent intéressants dans de nombreuses applications. Cependant, la plupart sont encore bien moins précis que des capteurs classiques de sorte que des méthodes de correction d'erreurs doivent être développées. Ce papier propose une méthode de réduction des bruits stochastiques basée sur un filtre de Kalman. Une...

Université de Neuchâtel

Error Correction Applied to Microsensors in a Navigation Application

Marselli, Catherine ; Amann, Hans Peter ; Pellandini, Fausto

In: Proceedings of the 1st Europe-Asia Congress on Metatronics, 1996, p. 650-655

The inertial microsensors might bean interesting complement in automotive land navigation. However, they have low accuracy and the principle of inertial navigation make the sensor's errors to accumulate, leading to unacceptable results. In this work, we are interested in the design of a strong signal processing system for error correction. We work on a strapdown configuration with low-cost...

Université de Neuchâtel

System-Level Simulation Using Mixed-Nature Models

Boegli, Alexis ; Moser, Vincent ; Amann, Hans Peter ; Pellandini, Fausto ; Romanowicz, Bart ; Lerch, Philippe ; Laudon, Matthew ; Renaud, Philippe

In: Proceedings of the 1st Europe-Asia Congress on Metatronics, 1996, p. 12-17

Miniaturized, integrated sensors and actuaturs are more and more used in microsystem applications. In order to promote their use further, specialists must make them more accessible to System designers. This can be done through behavioral modeling of sensors and actuators. The resulting models can be used in conjunction with models of the associated electronics to simulate a complete microsystem....

Université de Neuchâtel

Error Modelling of a Silicon Angular Rate Sensor

Marselli, C. ; Amann, Hans Peter ; Pellandini, Fausto ; Grétillat, F. ; Grétillat, M.-A. ; de Rooij, Nicolaas F.

In: Symposium Gyro Technology, 1997, p. 4.0-4.9

The coupling between microsensors and efficient signal processing is essential to achieve demanding specifications for navigation applications. The performances of a silicon micromachined angular rate sensor are outlined showing that the main shortcoming consists of an important offset drift. This error is modelled and used in a correction algorithm based on Kalman filtering. The filter aims at...

Université de Neuchâtel

Simulation and design of a three axis navigation microsystem based on micromachined sensors

Ansel, Y. ; Lerch, Philippe ; Renaud, Philippe ; Paoletti, F. ; Grétillat, M.-A. ; de Rooij, Nicolaas F. ; Schröpfer, G. ; Ballandras, S. ; de Labachelerie, M. ; Marselli, C. ; Amann, Hans Peter ; Pellandini, Fausto

In: MicroSim II (Simutation and design of microsystems and microstructures), 1997, vol. 2, p. 107-116

The project presented in this paper aims at defining the limits of microsystems through the realisation of a navigation system based on inertial microsensors. The work includes (i) design, fabrication, characterisation of accelerometers and angular rate sensors, (ii) development of techniques for simulation of sensor behaviour, and (iii) design of a sensor data processing system.

Université de Neuchâtel

Design Automation in Digital Signal Processing : synthesizable VHDL models for rapid prototyping

Sun, Dequn ; Amann, Hans Peter ; Heubi, Alexandre ; Pellandini, Fausto

In: Proceedings of the Symposium on Signal and Image Processing (GRETSI), 1995, vol. 15, p. 1065-1068

Cet article présente un exemple d'implémentation matérielle complète d'un filtre numérique en treillis RIF-RII. Des outils CAO ont été utilisés avec des modèles VHDL synthétisables optimisés pour des applications basse consommation du traitement numérique du signal. Sur la base de cette exemple, des comparaisons ont été effectuées entre la conception manuelle et une approche CAO...

Université de Neuchâtel

A standard-cell library for a Sea-of-Gates : an experience with ICStation and ICBlocks

Boegli, Alexis ; Corthay, F. ; Amann, Hans Peter ; Pellandini, Fausto

In: 1st Annual Mentor Graphics Alpine Local Users' Group Conference' (ALPSLUG), 1996, vol. 1, p. 1-4

The aim of the present work was to port a standard-cell library for a Sea-of-Gates (a “SOG” is a pre-diffused circuit where just the “metal“ layers are missing) from “CIF” files existing in a competitors format to Mentor Graphics library format. Obviously, neither “ICStation“ nor “ICBlocks“ have been designed to handle standard-cells on a “SOG“. Therefore, many practical...

Université de Neuchâtel

Behavioural Modelling of Sampled-Data Systems with HDL-A and ABSynth

Moser, Vincent ; Amann, Hans Peter ; Pellandini, Fausto

In: Hardware Description Languages and their Applications, 1997, p. 159-177

In this paper we make use of a mixed analogue-digital HDL to model sampled-data systems. Modelling solutions are presented to code some sampled-data behaviour using either analogue or digital constructs of the language.Two key operations – sampling and shifting – are presented first. Then, these facilities are used to code difference equations. This approach is validated on the example of...