新型舵机结构运动分析与仿真

根据旋转弹弹道修正要求,提出一种基于4R空间机构的电动舵机结构,建立了理论分析模型,以空间机构学运动分析为基础,推导了机构输入、输出转角关系,绘制了理论分析转角曲线,建立机构三维模型,通过多刚体及刚柔耦合仿真验证分析了舵机转角关系和运动副受力情况,研究了该结构的可行性。计算分析结果表明,该舵机具有结构简单,动作可靠的优点,能满足舵机控制的转角精度和响应频率要求,适用于简易制导弹药。

Kinematic Analysis and Simulation of a Actuator with New Mechanism

According to the trajectory correction of rolling projectile requires,an electromechanical actuator based on 4R spatial mechanism is proposed. The theoretical model is built up. Based on the analysis of spatial mechanism,the relationship between the input and output angle of the mechanism is derived. The rotation curve derived from theory is drawn,and then the 3D model of the mechanism is established,the relationship between the rotations and the force on the joints is verified and analyzed through multi-rigid-body and rigid-flexible coupling simulation. The feasibility of the structure is researched. The analyzed result indicates that the structure is simple and the action is reliable. It can meet the angle precision and response frequency of the electromechanical actuator,and it is suitable for simple guided munitions.