A Model of the Air Temperature in a Truck Cabin

• Main Author: Björklund, Mattias
• Format: Others
• Language: English
• Published: KTH, Reglerteknik 2004
• Online Access: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-109469

This thesis project was carried out at Scania in Södertälje. The aim was to develop a model for the air temperature in a truck cabin. The model should simulate the truck temperature as it would have been measured by the Automatic Climate Controller’s (ACC’s) temperature sensor. Apart from the actual cabin temperature model, models for the heater and cooler systems also had to be developed. The model was developed in Simulink and is intended to be used in real-time ”hardware-inloop” simulations at Scania’s integration laboratory. For that purpose, simplicity of the model is given priority over high accuracy. Both black- and white-box techniques to model the cabin air temperature where developed and evaluated. Both techniques resulted in a model with acceptable performance. The main problem with the white-box model was a non-symmetry in the cabin temperature dynamics. This problem was solved by using variable parameters in the white-box model. The results of this thesis project shows possible approaches to do more accurate models of the cabin air temperature. The white-box model, in particular, is suitable to enhance in order to improve the performance.