电磁轨道发射系统电枢膛内速度实时检测方法研究

Study on the real-time detection method of the armature velocityof the electromagnetic rail launch system

摘要:

电枢出口速度的稳定性是电磁轨道发射系统的关键性能指标。电磁发射试验过程中对电枢进行实时速度检测并实施反馈控制是提高这一关键指标的有效方法。采用差分式B探针作为电枢在发射器膛内运动速度检测的传感器,运用运算放大器、电压比较器以及门电路组成实时检测模块和脉宽比较模块,提取电枢经过B探针的时刻并实时判断电枢速度是否达到所设定的阈值。该实时速度检测过程延时时间不超过2微秒,其输出结果可用于电磁轨道发射系统电枢速度反馈控制。

Abstract:

The stability of the armature exit velocity is the key performance indicators of the electromagnetic rail launch system. It is an effective way to improve this key indicator by real-time speed detection and feedback control in electromagnetic launch test. The differential B-dot is used as the sensor for the velocity detection of the armature in the emitter. The operational amplifier, voltage comparator and gate circuit are used to make the real-time detection module and pulse width comparison module, extract the time of the armature through B-dot and determine whether the armature velocity reaches the set threshold. The real-time speed detection process is delayed by 2μs, the output results provide input to the feedback control decision of the armature velocity of the electromagnetic rail launch system.