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Study on the Key Technology of Airport Runway Frictional Coefficient Measurement

The airport runway frictional coefficient is one of the most important factors which affects the safety of airplane's landings and take-offs under the rain or snow weather. In this paper, each kind of factor which affects the precision of frictional coefficient measurement under the bad condition such as snow and ice covered, rubber pollution and wet runway have been analyzed, and then establish the model of frictional coefficient measurement. A new strategy which uses variable gain recursion least square algorithm has been used to eliminate the error caused by the rugged runway in the high speed measurement process, so as to assure system anti-jamming ability and fast track capacity. Use the vertical pressure pertinence analysis to eliminate the errors caused by the runway surfacing joint.