Flight Measurement System for Airship Propeller Based on Tube-type Strain Gauge Balance

doi:10.3901/JME.2022.16.301

Abstract

Abstract: The cruising height of the stratospheric airship is 25 km from the ground. Due to the differences in air temperature and density, the propulsive force provided by the propeller is likely to be quite different from the ground experiment. A flight measurement system is designed for the airship propeller to measure the force and moment in real time, which are received by the propeller during flight. It is used to identify the aerodynamic parameters of the airship. A tube-type two-component strain gauge balance and a data acquisition system are included in the measurement system. The dimension of the balance is designed considering propeller's structure, which can minimize the interference with the airship. And sequence quadratic programming(SQP) method is used to optimize the balance to enhance the axial force signal output. The data acquisition system is used to transmit the load collected by the balance, and contains a variety of sensors to correct the signal. The calibration and the ground simulation test which include influencing factors such as temperature, air pressure, axial acceleration and vibration, are carried out to ensure the accuracy and reliability of the measurement system. The results of flight test data show that the accuracy, consistency and reliability of the system test are good, which can meet the needs of measurement.

Key words: stratospheric airship, propeller, tube-type two-component strain gauge balance, propulsive force, torque, flight test

CLC Number:

TG156

CAO Tianci, NIE Ying, WANG Suning, WEN Haoju, MA Hongqiang. Flight Measurement System for Airship Propeller Based on Tube-type Strain Gauge Balance[J]. Journal of Mechanical Engineering, 2022, 58(16): 301-308.

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