天线座系统动态性能与稳定性影响因素分析

Analysis of Factors Influencing the Dynamic Performance and Stability of Pedestal Systems

为了更深入研究天线座机电耦合系统动态性能,特别是研究其结构参数和校正网络参数对系统稳定性的影响,文中结合实际应用需要,基于某机载雷达天线座机电耦合系统,考虑齿轮啮合时的时变刚度、齿轮侧隙、阻尼、轴承支撑刚度和摩擦等结构因素以及电流校正环参数,采用PID闭环控制系统,建立了机电系统耦合模型,研究了系统的动态特性以及影响系统稳定性的一些典型因素。系统动态特性分析结果与实物测试结果基本吻合,各项指标最大误差小于10%。系统稳定性受多种因素的影响,其影响因素是错综复杂的,但也有其规律性,研究结果对于天线座系统优化设计以及系统调试具有现实的理论指导作用。

In this paper, a mechanical-electronic coupling model is built, in order to study the dynamic performance of pedestal mechanical-electronic coupling systems more deeply, especially the influences on stability made by structural parameters and emendation meshwork parameters. A mechanical-electronic coupling system model is built based on an airborne radar pedestal mechanical-electronic coupling system, according to practical application. The model is with consideration of time-variation rigidity, profile gap, damping, bearing support rigidity, and friction when gears joggle, it also takes electric current emendation circle parameter into account. It adopts PID closed loop control system. The analysis result of dynamic performance is basically inosculated with object test result. The maximal error of indexes is less than 10 %. System stability is influenced by varieties of factors which also have rules. The study result has theory instructional effect on optimal design and system debugging of pedestal systems.