水下火箭弹引信涡轮全弹道测速误差分析  

Velocity measurement error analysis of underwater rocket fuze turbine in whole trajectory

作　　者：陈勇[1] 张合[1] 马少杰[1] 沈德璋[2] 

机构地区：[1]南京理工大学智能弹药技术国防重点学科实验室,南京210094 [2]中国工程物理研究院电子工程研究所,绵阳621900

出　　处：《仪器仪表学报》2014年第4期768-774,共7页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金(51275248);江苏省普通高校研究生科研创新计划(CXZZ13-0190)资助项目

摘　　要：为了提高水下火箭弹引信的测速、测距精度,分析了头部测速涡轮在全弹道环境下速度测量值的变化误差。首先针对水中弹药弹道特点,理论分析了在动态变化、小攻角、发生空化等情况下涡轮转动情况。讨论了使用动态数值仿真进行弹道环境模拟的方法,并结合仿真实验结果对该涡轮的测速进行误差分析。结果发现,在低速情况下动态误差较大,该误差随着速度的增加而减小;高速时产生的空化将会对涡轮测速误差产生较大影响,在传感器特性曲线上形成另一个"驼峰";小攻角下的全弹道测速误差变化趋势与无攻角情况基本一致。该分析结果对使用涡轮机构进行水下测速的水下高速运动体均具有参考意义。In order to improve the velocity and distance measurement accuracies of underwater rocket fuze,the velocity measurement errors of the head turbine are analyzed in whole ballistic environment.Firstly,aiming at the underwater ammunition ballistic characteristics,the turbine rotation is analyzed in the circumstances such as the dynamic change,small attack angle and occurrence of cavitation in theory.The method of using dynamic numerical simulation to conduct ballistic environment simulation is discussed; and combining the simulation experiment results,the turbine speed error is analyzed.The results show that in the case of low velocity,the dynamic error is large,and this error decreases as the velocity increases.At high velocity,the cavitation has a large influence on the turbine speed measurement error,which forms another ＂hump＂ on the sensor characteristic curve.The changing trend of the whole trajectory velocity measurement error at small attack angle is consistent with that for 0 degree attack angle.The analysis results have a reference value for all the underwater high-speed moving bodies that use turbine mechanism for underwater velocity measurement.

关 键 词：测速涡轮 误差分析 水下火箭弹引信 水中弹道 

分 类 号：TB22[天文地球—大地测量学与测量工程] TH82[一般工业技术—工程设计测绘]