Appropriate adjustment of combine header height can considerably reduce grain losses. Hence, selecting the best Header Height Control System for Combine Harvesters by considering of the technical and economical criteria is essential. In current research, fuzzy multiple criteria decision making method based on choquet integral has been employed for selecting the best combine header height control system. In this study, three automated header height control systems with six criteria i.e., cost, precision, simplicity, flexibility, frequency response and reliability were considered. The weights of criteria were determined by pair-wise comparison of AHP by agricultural machinery experts. Then, the interaction degree among alternatives and consequently proper fuzzy measures and choquet integral values were determined. Finally, Ultrasonic sensor and Proportional valve were selected as the best choices for use in the automatic control system of combine header height. by Sensitivity Analysis.
