摘要
导引头伺服机构是制导武器的关键核心部件,其在复杂严酷力学环境下,动态性能的优劣直接影响武器的制导精度。针对精密导弹伺服机构在高可靠、高精度指标下对动态性能与稳定性提升的工程需求,本文研究导引头伺服机构冲击环境激励动力学响应特性。首先,采用有限元法,建立导引头伺服机构的有限元仿真模型;其次,基于瞬态动力学理论,运用完全法进行冲击响应求解,分析其在不同方向的冲击动力学响应,得到局部刚度较差的关键薄弱位置,再次,对不同冲击参数和阻尼系数下的结构冲击响应进行分析,得到冲击响应的参数影响规律;最后,针对伺服机构关键薄弱环节弧形齿轮进行应力分布分析,研究轴承支承参数对弧形齿轮的影响规律。结果表明:弧形齿轮支承轴承越靠近右端效果越差,同时也间接影响了弧形齿轮的最大等效应力分布。本文研究可为航天精密伺服机构的动态性能优化与装配参数控制提供参考指导。
Seeker servo mechanisms are the key core components of guided weapons,and their dynamic performance under complex and harsh mechanical environment directly affects the guidance accuracy of the weapons.Aiming at the engineering requirements of dynamic performance and stability improvement of precision missile servo mechanisms under high reliability and high precision,this paper studies the dynamic response characteristics of seeker servo mechanisms under impact environment excitations.First,the finite element model of a seeker servo mechanism is established by the finite element method.Second,based on the theory of transient dynamics,the complete method is used to solve the impact responses,and the impact dynamic responses in different directions are analyzed to obtain the key weak positions with poor local stiffness.Third,the structural impact responses under different impact parameters and damping parameters are analyzed,and the parameter influence law of impact responses is obtained.Finally,the stress distribution of the arc gear,the key weak link of the servo mechanism,is analyzed,and the influence of the bearing support parameters on the arc gear is studied.The results show that the closer the arc bearing support is to the right end,the worse the effect is,which indirectly affect the maximum equivalent stress distribution of the arc tooth.The research in this paper can provide reference guidance for the dynamic performance optimization and assembly parameter control of aerospace precision servo mechanisms.
作者
朱骏
王志诚
郑田泽
赵倩
袁静
邢振弘
ZHU Jun;WANG Zhicheng;ZHENG Tianze;ZHAO Qian;YUAN Jing;XING Zhenhong(Shanghai Radio Equipment Research Institute,Shanghai 201109,China;School of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)
出处
《上海航天（中英文）》
CSCD
2024年第4期113-119,140,共8页
Aerospace Shanghai（Chinese&English）
基金
国家自然科学基金(52205113,52375111)
上海航天科技创新基金(SAST2020-052)
上海市青年科技英才扬帆计划(21YF1430600)。
关键词
导引头伺服机构
动力学响应
冲击激励
环境仿真
有限元法
seeker servo mechanism
dynamic response
impact excitation
environmental simulation
finite element method
