SENSORS CHARACTERIZATION AND CONTROL OF MEASUREMENT SYSTEMS BASED ON THERMORESISTIVE SENSORS KEPT AT CONSTANT TEMPERATURE
Marcia Moreira, Amauri Pereira de Oliveira, Carlos E.T. Dórea, Péricles Rezende Barros, José Sérgio da Rocha Neto · 2009
This paper proposes the use of feedback linearization for the characterization of thermoresistive sensors and for the control of measurement systems based on thermoresistive sensors kept at constant temperature. Two important benefits brought by feedback linearization are: regarding sensor characterization, it allows the determination of static and dynamic parameters by a single experimental test; concerning temperature control of the measurement system, it makes the controller design simpler and prevents linear controllers from losing performance due to changes in the operation point. A simple PI controller in combination with feedback linearization is then applied to the system. Experimental results for sensor characterization and temperature control are presented.