为提高电磁轨道发射装置的稳定性，提出在电磁发射装置身管上施加预紧压力，利用液压伺服的液压自稳定性来平衡电磁冲击力引起的振动。在发射装置上3个不同位置安装具有抗电磁干扰的压电加速度传感器实时采集轨道的振动信号，应用虚拟仪器技术对比分析轨道振动频率和幅值变化。施加液压伺服预紧后大幅值振动时间明显缩短，并且在不同位置施加液压伺服预紧，发射装置呈现不同的振动特性。试验结果表明，施加液压伺服预紧能够有效缩短轨道的振动持续时间，提高电磁轨道发射装置的稳定性。
Abstract
In order to improve the stability of electromagnetic rail launcher, a pre-load pressure is applied on the barrel of electromagnetic rail launcher, and the hydraulic self-stability of hydraulic servo is used to balance the vibration caused by electromagnetic force. The piezoelectric acceleration sensors with anti-electromagneticinterference are installed at three different positions on the launcher to collect the real-time vibrational signals of rail, and the vibration frequency and amplitude spectrum of the rail are compared and analyzed by using virtual instrument technology. After applying a hydraulic servo pre-load, the time of large amplitude vibration is obviously shortened, and when hydraulic servo preload is applied at different positions, the launcher shows different vibrational characteristics. The test results show that the hydraulic servo pre-load can effectively shorten the vibration duration of rail, furthermore, improving the stability of electromagnetic rail launcher.Key
关键词
电磁发射 /
振动特性 /
液压伺服预紧 /
幅值谱图
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Key words
electromagneticlaunch /
vibrationperformance /
hydraulicpre-load /
amplitudespectrum
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基金
国家自然科学基金项目(61403333)；河北省高等学校科学技术研究项目（ZC2016099）
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第40卷第1期
2019年1月兵工学报ACTA
ARMAMENTARIIVol.40No.1Jan.2019
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脚注
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