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为了满足航空发动机推力矢量高精度测量的需求,研制了一种结构紧凑的能够实现推力矢量彻底分解的六分量盒式天平.该天平关键结构包括:三维传感器、固定框和浮动框.其中三维传感器的弹性体采用串、并联组合的结构型式.基于有限元分析,对传感器弹性体的设计进行了模拟,结果显示传感器各测力元件对本分量载荷作用敏感程度均远高于其他分量,支撑元件也较好地阻隔了各测力元件之间的相互干扰,该结论也通过了传感器的校准验证.六分量盒式天平整体的刚度和模态分析结果:天平无需做弹性角修正;1阶固有频率为218.8Hz,高于设计指标180Hz.六分量盒式天平校准表明:天平各分量精确度优于3‰,准确度优于5‰.
In order to meet the demand of high precision measurement of aero-engine thrust vector, a compact six-component box balance that can completely decompose the thrust vector is developed.The key structure of the balance includes three-dimensional sensor, fixed frame and floating frame, Of the elastic body adopts the structure type of the combination of the series and the parallel.Based on the finite element analysis, the design of the sensor elastic body is simulated and the results show that each load cell of the sensor is sensitive to the load of this component much higher than the other components, Which obstructs the mutual interference between each load cell, and the conclusion also passes the calibration verification of the sensor.The stiffness and modal analysis results of the six-component cassette balance as a whole do not need to do elastic angle correction, the first order natural frequency For the 218.8Hz, higher than the design index of 180Hz. Six-component box balance calibration shows that: the balance of each component accuracy is better than 3 ‰, the accuracy is better than 5 ‰.