武装直升机瞄准线粗/精组合二级稳定技术

 提出并采用一种粗/精组合二级稳定的新方案，用于对武装直升机多传感器光电综合制导系统瞄准线（LOS）及图象进行高精度稳定与跟踪。该技术的重要特征是采用挠性支承精稳反射镜组件以及粗/精多回路复合控制技术以获得高回路带宽和对扰动的大幅度衰减。用一个双自由度陀螺进行稳定及跟踪，有效地解决了粗/精通道的匹配与耦合。与传统的LOS稳定系统相比较，稳定精度提高近一个数量级。根据某型直升机振动频谱进行定频振动测试，目前的原理样机在35kg稳定负载下其稳定精度优于14微弧（RMS）,粗、精振幅衰减比大于8倍。

LINE OF SIGHT COARSE/FINE COMBINATION TWO LEVEL STABILIZATION TECHNIQUE IN ARMED HELICOPTERS

A new scheme is suggested and adopted which can be used for high accuracy stabilization and tracking of line of sight (LOS) or image of optical electronical synthetic system in possession of multi sensors in military helicopter. An important characteristic is that the fine mirror is supported by a flexural pivot ,and that a high loop bandwidth is obtained and the disturbance is greatly diminished by using coarse/fine combination multiple feed control technique. The coupling and match between two channels can be resolved by using a two freedom gyro to control. Compared with traditional LOS stabilization , its error is decreased by about one order of magnitude. On the basis of some typical helicopter vibration spectrum , a vibration test was done . At present , the stabilization accuracy of the prototype having been studied has an advantage of 14 μ rad (RMS) and the diminution rate of fine/coarse vibration magnitude is as high as 8 times.