Search

At ENSICA several teams of students developed a mini aerial system that is now mature and is used for teaching. The system includes an original delta wing configuration able to bring a complete avionics system (sensors, actuators and controller) and a micro camera. We describe how a non linear model is obtained from wind tunnel tests and a linear state space model is then obtained. These models can be used for basic control theory. The board originally designed at ENSICA includes enough sensors to estimate the attitude and position of the plane. It is used at ENSICA as a basis for Kalman filtering theory teaching.

International audience; In this paper, we define a dynamic discrete model of a passive air conditioning unit, without the more typical compression or absorption-refrigeration cycle. The unit is composed of heat exchangers, a positioning system and humid corrugated pads. The aim of the study was to follow the temperature in a greenhouse and to replicate it with a desired and stable relative humidity in a ventilated growth chamber. A control law, based on a quadratic criterion and dynamic programming, taking output error and energy consumption minimisation into account, was used to control the behaviour of the unit in spite of air intake disturbances. The results of the simulation indicate that the air conditioning unit can produce a variable climate in the growth chamber, with a wide range of relative humidity setpoints.