飞行仿真系统中舵机特性建模与模型降阶  

Modeling of Rudder-Controller and Its Order Reduction for Flight Simulation System

作　　者：闫昌盛[1] 陈欣[1] 欧干良[1] 

机构地区：[1]南京航空航天大学自动化学院,江苏南京210016

出　　处：《计算机仿真》2006年第11期50-53,共4页Computer Simulation

摘　　要：针对某型电液伺服舵机特性,首先建立了线性数学模型,在此基础上推导出了传递函数。其次针对该传递函数阶数较高,难以在仿真系统中实现的问题,通过基于G ram矩阵的均衡模型降阶法,运用matlab工具箱对该传递函数进行降阶处理,得到了降阶最小实现模型。然后对原始高阶函数和降阶后函数分别进行了仿真试验,比较测试结果发现,两者仿真曲线基本一致,符合要求。最后将最小实现模型加入飞行仿真系统进行测试,结论表明该系统性能良好,完全能够替代真实舵机进行飞行控制系统仿真试验。This paper establishes a mathematical model based on the characteristic of a servo -controller first, and then deduces the translating -function on the elements. Because the function order is high and it is hard to design and realize, a balanced method for reducing the order of the function based on Gram matrix in the Matlab is presented and then a minimal realization model is obtained. Testing the two models and comparing the curve before the order reduction with the curve after the reduction, it is found that the curves are almost the same and can meet project requirement. In the end the model accedes to the simulation system to verify the result. The simulation result shows that the system is good enough to replace the real servo -controller.

关 键 词：伺服舵机 线性化 仿真 模型降阶 最小实现 

分 类 号：N945.12[自然科学总论—系统科学]