隔转鸭舵式弹道修正弹电磁执行机构工况研究

Research on Working Condition of Electromagnetic Actuator of Trajectory Correction Projectile with Decoupled Canards

为研究隔转鸭舵式弹道修正弹执行机构的工况,对鸭舵和轴承进行动力学建模,改进基于欧拉方法的双旋弹道模型,并利用弹道参数对电磁执行机构的设计工况进行验证.以不同发射条件下弹体和鸭舵的滚转状态为基础,提取执行机构的工作转速和电磁扭矩.计算结果表明：鸭舵在出炮口后能够快速实现相对弹体的反向滚转,并逐渐达到低速的平衡状态,且平衡转速受发射条件影响小.弹体转速是引起执行机构工作转速范围较大的原因,弹丸经过弧顶后,执行机构的工况趋于平稳,转速保持在130 ～230 r/s范围,所需扭矩小于0.5 N·m.从执行机构工作带宽的角度考虑,最佳启控点宜在弧顶之后.基于顶层弹道模型获取关键部件设计指标的方法为双旋弹道修正弹的工程应用提供了借鉴.

The canard and bearing are dynamically modeled to improve the dual-spin trajectory model based on Euler approach.The working condition of electromagnetic actuator of trajectory correction projectile with decoupled canards （TCPDC） is investigated.The designed working condition is validated by the parameters derived from the dual-spin trajectory.The spin-rate and electromagnetic torque of actuator are extracted based on the rolling states of projectile and canards.The calculated results indicate that the canards spin in relative to the opposite direction of projectile body rapidly after launch,and then spin down at a relatively low and stable rate,which is hardly affected by the launching conditions.The spin rate of projectile is the main factor,which leads to a large range of actuator＇ s working speed.After the projectile flies through an apogee,the spin rate of actuator could be stably maintained between 130 and 230 r/s,and the essential torque is less than 0.5 N· m.In terms of the working range of actuator,the optimal starting control point should be in the segment behind the apogee.