Analysis on the Dynamic Response Characteristics of Seeker Servo Mechanisms under Impact Environment
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.
seeker servo mechanismdynamic responseimpact excitationenvironmental simulationfinite element method
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