摘要
针对舵机带宽影响Ⅱ型PIO预测结果的问题,提出对有限舵机带宽人机系统运用高度饱和描述函数模型进行Ⅱ型PIO预测。基于描述函数法分别建立了速率限制舵机的正弦输入/三角输出描述函数模型和高度饱和描述函数模型,研究了两种模型在Ⅱ型PIO预测中的使用域。对有限舵机带宽人机系统,分别运用高度饱和描述函数模型及正弦输入/三角输出描述函数模型进行了Ⅱ型PIO预测。仿真结果表明,在进行Ⅱ型PIO预测时需考虑舵机带宽的影响,应用高度饱和描述函数模型可提高预测结果精度。
To avoid the prediction results of category Ⅱ PIO being affected by actuator bandwidth,highly saturation describing function models were employed to predict category Ⅱ PIO.Sinusoidal input/triangle output model and highly saturation model based on describing function method were established.The utility region of describing function models was studied.The category Ⅱ PIO susceptibility of pilot-vehicle system with finite bandwidth was evaluated by highly saturation model and sinusoidal input/triangle output model.Simulation results demonstrate that actuator bandwidth should be taken into account during PIO prediction course and prediction precision could be improved by the application of highly saturation model.
出处
《系统仿真学报》
CAS
CSCD
北大核心
2011年第4期813-816,共4页
Journal of System Simulation
基金
国家自然科学基金(60572172
61074007)
关键词
飞行安全
PIO
描述函数
舵机
速率限制
flight safety
pilot induced oscillations
describing functions
actuators
rate-limit
