Kinematics Precision Analysis and Experiment for Throat of Axisymmetric Vectoring Exhaust Nozzle
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摘要: 推力矢量技术主要通过控制矢量喷管偏转来实现矢量控制, 轴对称矢量喷管具有偏转机构设计简便、矢量作用效果明显等优点, 其喉道运动是完成喷气收扩的基础, 为了研究其运动规律, 设计了三环连杆传动控制结构; 建立了喉道运动学及精度分析模型, 讨论了A8两铰孔位置误差、电机伸缩量误差、两个铰座孔的位置误差、外环厚度方向误差对喉道的误差影响; 设计搭建矢量喷管实体实验平台, 通过非矢量运动实验, 验证运动学及精度分析模型的正确性, 为进一步喉道和喷口控制分析奠定一定基础。Abstract: The thrust vector technology mainly realizes the vector control by adjusting the deflection of vector nozzle. The axisymmetric vector exhaust nozzle has the advantages of simple design of deflection mechanism and obvious effect of vector action. In order to study its motion law, the three-ring linkage transmission control structure is designed, the kinematics and precision analysis model of throat is established, and the influence of the position error of A8 two reaming holes, motor telescopic error, position error of two reaming holes and direction error of outer ring thickness on the error of throat channel is discussed. The experimental platform of vector nozzle is designed and built. With the non-vector motion experiment, the correctness of kinematics and precision analysis model is verified. This paper laid a foundation for further control analysis of throat and nozzle.
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