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摩擦力矩、导线干扰力矩和质量不平衡力矩等各种非线性因素会对导引头的性能产生严重影响,国内外学者对导引头摩擦力矩和导线干扰力矩做了大量分析,而对质量不平衡力矩研究甚少。为了研究导引头伺服机构质量不平衡力矩的传递机理及其对平台速度稳定性能的影响,以两框架导引头伺服机构为对象,利用欧拉角坐标变换方法和刚体绕动点转动的动量矩定理建立了完整的运动学和动力学模型。在此基础上,针对某导引头样机,首先分析了框架转动中心与导弹质心距离以及框架质心偏心距离对质量不平衡力矩的影响;然后分析了质量不平衡力矩对平台稳定回路性能的影响。结果表明:当框架转动中心与导弹质心距离和框架质心偏心距离较大时,质量不平衡力矩会严重影响平台的稳定性能,设计时必须重点考虑。
Friction torque, wire interference torque and mass unbalanced torque and other nonlinear factors will have a serious impact on the performance of the seeker, domestic and foreign scholars seeker friction torque and wire interference torque made a lot of analysis, but the quality is not There is little research on the balance moment. In order to study the transmission mechanism of the unbalanced moment of the servo system of the seeker and its influence on the speed stability of the platform, the two-frame seeker servo mechanism is used as the object. The Euler angular coordinate transformation method and the momentum Moment theorem established a complete kinematics and dynamics model. On the basis of this, for a seeker prototype, firstly, the influence of the distance between the center of rotation of the frame and the center of mass of the missile and the eccentric distance of the center of mass of the frame on the unbalanced moment is analyzed. Then, the influence of mass unbalanced moment on the performance of the stabilized circuit of the platform is analyzed. The results show that when the distance between the center of rotation of the frame and the center of mass of the missile and the eccentricity of the center of mass of the frame are large, the unbalanced mass moment will seriously affect the stability of the platform, and the design must be emphatically considered.