论文部分内容阅读
高速飞行器中的电子仪器大多用橡胶减震器支承起来,以便抗御高达15g加速度的宽带随机振动。然而高速飞行器对于电子仪器激励的冲击却高达50g,11ms。而对于一般的橡胶减震器对于这种冲击是个“放大器”,将冲击加速度峰值放大18倍以上,将50g放大到一百多g,总有一些仪器在冲击下失效,例如仪器内的继电器触点抖动,音叉与石英晶体频率漂移,磁芯失去记忆功能,元件引线折断……。这样就提出了设计一种既要减振,又要缓冲的电子仪器减震支承的要求。我们分析采用低频减震器与特殊的缓冲器并联可以满足这样的要求。库仑摩擦的缓冲器国内外都有报道及应用,但结构复杂,不利于保证高速飞行器的控制系统与遥测系统的高可靠性。为此我们决定设计一种高阻尼材料的,具有旋转抛物体外形的缓冲器。根据动力学分析与试验证
Most of the electronics in high-speed aircraft are supported by rubber dampers to resist wide-band random vibrations up to 15g acceleration. However, the impact of high-speed aircraft for the stimulation of electronic equipment is as high as 50g, 11ms. As for the general rubber shock absorber for this impact is an “amplifier”, the peak acceleration of magnification of 18 times more than the amplification of 50g to more than 100 g, there are always some of the instruments under the impact of failure, such as the relay contacts within the instrument touch Point jitter, tuning fork and quartz crystal frequency drift, the core loss of memory function, component leads broken ... .... In this way, it is proposed to design a vibration-absorbing and cushioning electronic equipment shock-absorbing support. We analyze the use of low-frequency shock absorber and a special buffer in parallel to meet this requirement. Coulomb friction buffer has been reported and applied at home and abroad, but the structure is complex, which is not conducive to ensuring the high reliability of the control system and telemetry system of high-speed aircraft. For this reason we decided to design a buffer with a highly parabolic shape and a high damping material. Based on kinetic analysis and test certificate