为解决常规测试方法难以准确测试弹丸膛内整个运动区间过载, 以及电磁发射中强电磁环境对弹载测试器件干扰的问题, 提出了一种适用于电磁轨道发射方式弹丸膛内过载的测试方法。首先, 基于电磁发射技术膛内过载可调可控的技术优势, 提出了通过控制电流波形为平顶波建立“恒过载”加载区间测试弹丸过载的测试原理。其次, 建立了电磁轨道发射弹丸过载测试方法, 通过控制电流加载波形和改变电流幅值的方法建立过载和电流对应关系, 由电磁发射试验测试得到的加载电流和对应关系间接得到弹丸膛内过载。最后, 开展电磁发射试验, 对常规测试方法和新原理测试方法进行对比, 结果表明:新方法能够完成弹丸膛内整个运动过程过载加载历程测试, 能更真实地反映弹丸克服静摩擦力后启动开始运动的过程, 既满足电磁发射弹丸膛内过载测试需求, 也避免了强瞬态电磁干扰对测试造成的影响。

It is difficult to accurately test overload of a projectile moving in a bore by conventional testing methods and the strong electromagnetic environment interferes with the testing devices in electromagnetic launching, a new method for testing the overload of the projectile in the bore is proposed. Firstly, based on the technical advantage of electromagnetic launching technology that the overload in the bore is adjustable and controllable, a testing principle for projectile overload test is put forward, that controls the current waveform and makes it into a flat wave, then establishes a constant overload loading interval to test projectile overload. Secondly, a new test method of the projectile overload, that is launched by electromagnetic rail, is established. By controlling the current loading waveform and changing the current amplitude, the corresponding relationship between the overload and the current is established, and through electromagnetic launching test, it can get the loading current and corresponding relationship and indirectly get overload of the projectile in-bore. Finally, the electromagnetic launching test is carried out, and the conventional test method and the new test method are compared. The results show that the new test method can complete the overload loading process test of the whole inner bore, and can more truly reflect the process of the projectile starting to move after overcoming the static friction. This test method can meet the requirements of in-bore overload test of electromagnetic projectile, and avoid the influence of electromagnetic interference on the test.