Pressure control system based on an adaptive model and advantages of the hardening of a resin

摘要

It hardens composites such as a resin reinforced pmr15 of graphite in a heated press 16, 17 in a plane of the temperatures and in the passing of a low pressure at a high pressure after the beginning of the crosslinking of the resin. A control of temperature and a method of application in the time of a high pressure hp use the outputs of temperature sensors and the dielectric, as well as a semi - empirical model of the electrical conductivity of the resin. The model is the variations in the future of the conductivity of the resin and determines the time remaining until obtaining a maximum value of the electrical conductivity. A signal intended to apply a high pressure is generated when the estimated time to obtain the maximum conductivity drops to the - below a threshold. A direct adaptation of the model to the data of the detectors, whereas it is collected, provides a mechanism in order to adapt the control of the features of a given batch of resins and of a particular plane of hardening. / p & & p & application to the manufacture of composite materials in the resin to the structures of the aircraft and motor vehicles.