Abstract：Studied the on-situ calibration method of five-component helicopter aerodynamic measurement balance. According to the measurement principle and structural characteristics of the helicopter aerodynamic measurement balance which mounted on the top of a helicopter fullscale rotor test tower, the researchers determined the on-situ calibration technical scheme of the combined loading based on the principle of force superposition. According to its principle, the field calibration device is developed, and the design of key mechanical structure and the control system of adaptive cooperative algorithm are introduced. A high precision micro-deformation measurement system was developed to evaluate the calibration error. Finally, the performance of the calibration device was verified through the on-situ calibration test of the rotor test tower, and the on-situ relative calibration uncertainty of each force element was evaluated to be better than 0.1% (k=2).
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2022, Vol. 43 
