摘要
基于电传飞行控制系统中速率限制舵机的非线性特征,建立了速率限制舵机的简化模型。提出运用描述函数法建立速率限制舵机的精确正弦描述函数模型、高度饱和与近饱和描述函数模型。将高度饱和与近饱和描述函数模型的频率特性与精确正弦描述函数模型的频率特性进行了对比研究,获得了高度饱和与近饱和描述函数模型的使用域。研究结果可为控制系统中速率限制舵机非线性特性的分析提供重要理论依据。
The rate limiting actuator model was built according to nonlinear characteristic of rate-limit in the fly-by-wire flight control system.The exact sinusoidal,highly saturated and near saturation describing function model of rate limiting actuator were built by the describing function method.The magnitude and phase of highly saturated and near saturation describing function models were compared with the magnitude and phase of exact sinusoidal describing function model.The use region of each model was gained.The results can provide a theory reference for rate limiting actuator nonlinear characteristic analysis.
出处
《飞行力学》
CSCD
北大核心
2011年第5期14-17,共4页
Flight Dynamics
基金
国家自然科学基金(61074007)
关键词
电传飞行控制系统
速率限制
描述函数
非线性
fly-by-wire flight control system
rate-limit
describing functions
nonlinearity
