飞行试验总静压参数现场校准技术研究

某型试验机由于一体化改装状态限制,总静压传感器拆卸困难,难以实现实验室校准,通过对总静压参数测试、校准原理以及现场环境下的误差影响关键因素开展研究提出一种新的现场原位校准方法以解决该问题。为验证该方法在飞行试验数据测试工作中的准确及实用性,在该型试验机地面试验现场采用提出的在线校准方案进行校准,结果表明,校准数据线性度高,经过校准后的传感器基本误差优于0.1%。经过飞行试验工程验证,该校准方案可满足飞行试验测试数据精度要求,为机载参数校准工作的流程和精度优化提供一种新思路。

Research on Field Calibration Technology of Total Static Pressure Parameters in Flight Test

Due to the limitation of integrated modification, the total static pressure sensor is difficult to disassemble, which makes it difficult to achieve laboratory calibration. A study on the key factors of total static pressure parameter test, calibration principle and error in the field environment was carried out, and a new on-site calibration method was proposed to solve this problem. In order to verify the accuracy and practicability of the method in the flight test data test, the on-line calibration scheme was used to calibrate the ground test site of the test machine. The results show that the calibration data has high linearity and the basic error of the calibrated sensor is better than 0.1%. After verification by flight test engineering, the calibration scheme can meet the accuracy requirements of flight test data, and provides a new idea for the process and accuracy optimization of airborne parameter calibration.