【摘要】 用特征结构配置与奇异值灵敏度分析相结合的方法，为某飞机设计了地形踉体系统控制器，并在系统结构参数变化与风干扰条件下，验证了系统的鲁棒性．大量的数学仿真在明，该系统已达到了地形跟随系统的规范要求．更多还原

【Abstract】 Due to change in terrain, ground structures,and air current during extremely low-altitude flight,the various flight parameters of aircraft have to suffer frequent and drastic changes.This requires good robustness of aircraft flight control system, in order to reduce to a minimum the adverse effect of peramcter changes on flight quality.In the design of terrain following system, state feedback may be employed for the purpose of obtaming simultaneously the assignment of eigcnvalues and eigenvectors, thus ensuring that the designed system can satisfy performance requirements; but robustness of such a system is not satisfactory.In this peper the authors overcome such deficiency of robustness by applying the method of analyst,of singular-value sensitivity to improving assignment of cigenstructure.Essentially the key to the authors’success is:the authors employ the analysis of minimum singulareyalue sensitivity of system-return-difference matrix to mcve cigenstructure into desired region.The authors’proposed method can also simultaneously satisfy requirements of terrain following system for limiting normal load and for accurate altitude following.The authors perform digital simulation for system subjcctcd to changes of flight p.ramettr and also to wind disturbance.Results of such simulation show that the designed system satisfics certain technical requirements for terrain following system.These technical requirements include performance requirements originally intended for aircraft itself and stipulated in MIL-F-8785.Simulation results also show that the designed system possesses good robustness.更多还原