Section: New Results

Applications

As it was mentioned, Non-A is a kind of "method-driven" project, which deals with different aspects of finite-time estimation and control. Thus different applications are possible, ones touched this year are as follows (skipping the networked robots considered in the previous section):

• Method and device for detecting a failure on an aircraft are developed and patented [85] .

• In [44] the measurements of valve activity in a population of bivalves under natural environmental conditions (16 oysters in the Bay of Arcachon, France) are used for a physiological model identification. A nonlinear auto-regressive exogenous (NARX) model is designed and tested. The developed dynamical model can be used for estimation of the normal physiological rhythms of permanently immersed oysters and, in particular, for ecological monitoring.

• The articles [53] , [18] , [20] , [77] present novel control strategies for Permanent Magnet Synchronous Motor (PMSM), which does not ignores the relay nature of the actuators. A design procedure based on Linear Matrix Inequalities (LMI) allows us to derive the switching surfaces, which depend on the motor position. The sliding mode and nonlinear adaptive observers are designed for state estimation and parameters identification.

• The problem of air-fuel ratio stabilization in spark ignition engines is addressed in the paper [23] . The proposed strategy consists of proper switching among two control laws. The first one is based on an a priori off-line identified engine model and the second control law is adaptive. The supervisor realizes a switching rule between them providing better performance. Results of implementation on two vehicles are reported and discussed.

• The paper [37] deals with a control design for serial multicellular choppers. The novel scheme that uses two Petri nets (PNs) to carry out the control action is introduced. Experimental results from four and five-level choppers are used to emphasize the performance and the effectiveness of the proposed control scheme.

• The paper [52] is concerned with preliminary results on robot vibratory modes on-line identification using the external measurement provided by a laser tracker. A comparison between the algebraic method and the sliding modes for the parameter identification is proposed. Experimental identifications are proposed on a 6 degrees of freedom (DOF) manipulator robot Stäubli RX-170B.

• The papers [30] , [29] , [16] develop different fault detection schemes for robust and early detection of faults in aircraft control surfaces servo-loop. A complete Monte Carlo campaign from a high representative simulator, provided by Airbus as a part of the ADDSAFE project, as well as experimental results obtained on AIRBUS test facilities demonstrate the high fault detection performance, robustness and viability of the proposed techniques.

• The paper [28] deals with the problem of the practical tracking control of an experimental car-like system called the Robucar - a four-wheeled car in a single steering mode. A practical tracking controller is designed using the second-order sliding mode control. Experimental tests are presented and compared with the conventional sliding controller.

• Power converters are a very important for the control of high power systems. In the article [45] we propose a control strategy for minimizing the no-load conduction losses and analyze the transient behavior in case of load steps including output short-circuit.