Résumé
In civil aeronautics, the electric systems which compose the aircraft are increasingly numerous, from the increase in the functionalities, the needs for the users (comfort), but also by the need to improve the performances of the electromechanical and hydraulic actuators, to even replace them by electric whole. Thus, the power electronics systems are the first electric devices which the actuators see. These devices are interfaced with the interfaces of piloting by systems of control.<br />The aeronautical standards impose that all the devices used on an aircraft answer severe stresses as for their reliability and their safety. In the precise case of the static inverters which control the actuators, one is confronted with the standards of operation of the electrical supply networks, with standards E.M.C., the environmental standards (within the meaning of the context of the device), and with the standards related to the systems of control.<br />The market of aeronautics, although very specific, is very competing on a world level. Multiple objectives of very powerful materials, highly reliable, very sure, but the least expensive possible, are thus of true problems.<br />Within the framework of the static inverters, a means to reduce the costs is the use of DSP (DIGITAL Signal Processors) to maximize the integration of the control and to reduce the costs, but this component is not designed for the aeronautical medium.<br />The whole of this study relates to the design of a new type of radar marked by several technological ruptures. The developed prototype comprises a static inverter controlled by a DSP, but having functionalities which go largely beyond the basic converter of power electronics. The aspect "system" is largely taken into account. The converter implemented is an autonomous device of servomotors piloting.