| To meet the testing requirements of dynamic vectored thrust measurement in next-generation engines,a vectored thrust
measurement method using piezoelectric triaxial load cells was proposed based on a six-component multi-axis vectored thrust measure?
ment system mounted in an underslung (floor-mounted)thrust stand. Triaxial piezoelectric sensors, rigid connection structures, and the
measurement system were designed.The force transmission characteristics of the piezoelectric vectored thrust measurement system were
analyzed through theoretical modeling and simulation,obtaining force transmission coefficients for each sensor in three directions,theoreti?
cally verifying the feasibility of the solution.The extreme loads at sensor positions were analyzed by simulation,and the ranges and dimen?
sions of the piezoelectric sensors were designed based on the analysis results.Piezoelectric sensors were developed and subjected to tests
including static calibration,dynamic calibration,and stiffness measurement.The results show that linearity errors and repeatability errors in
all three directions of each sensor are within 1%.In three directions,the natural frequencies reach 8701.1,8789.06,and 8457.03 Hz,
respectively, and the stiffness values are 709.9, 718.1 and 1538.4 kN/mm, respectively. The sensors exhibit excellent dynamic/static
characteristics,as well as high stiffness,meeting the requirements for dynamic vectored thrust measurement. |