某机高度稳定系统的高空振荡及气路延时的补偿

揭示了空速管路延时是造成某机高度稳定系统高空振荡的根本原因,研讨了飞行包线内运动粘性系统及与其关联的气路延时的变化规律,给出相位超前校正网络的参数特征以及用该网络补偿气路延时的工程设计方法。试飞证明,该法成功地解决了该机高度稳定系统高空振荡的关键技术问题。

COMPENSATION FOR THE TIME DELAY OF PITOT-STATIC TUBE CAUSING THE HIGH-ALTITUDE OSCILLATION IN AN ALTITUDE HOLD SYSTEM OF A FIGHTER

The time delay of the pitot static tube causing high altitude oscillation in an altitude hold system of a fighter has been revealed. The variation of the kinematic viscosity coefficient and the static pressure time delay of the pitot static tube associated with this coefficient has been investigated throughout flight envelope. The characteristic parameters of a phase lead corrective network as well as an engineering design method to compensate the tube delay using this network have been proposed. This method that successfully solved the key technique was demonstrated by flight test.