Analysis of the Influence of Total Pressure Error on Air Data Calibration

The installation error of the air data system is comprised of static pressure error and total pressure error. Two basic methods are used in flight test to determine the installation error of the air data system, namely pressure-based method and speed-based method. Total pressure error is usually small enough so that it can be neglected and won't cause significant errors. Sometimes, due to the position error of the pitot tube or the accuracy of the sensor, total pressure measured is different from the real total pressure, this difference can severely influence to the air data calibration result. This paper quantitative analysis the influence of total pressure error on the result of air data calibration, and put forward a solution to the air data calibration method in flight test.