基于速率限制的Ⅱ型驾驶员诱发振荡评估方法

速率限制问题已成为电传操纵飞机发生驾驶员诱发振荡（PIO）的主要原因。在新机设计中，随着复杂性的提高，预测PIO变得更加困难和重要。以人一机系统为研究对象，讨论速率限制对系统的影响，重点分析验证基于速率限制的Ⅱ型PIO的开环发生点（OLOP）准则的评估方法。针对不同飞行状态下的飞机纵向运动模型，使用两种驾驶员控制模型，在不同的驾驶员输入、不同速率限制条件下进行数值仿真试验研究。结果表明：OLOP准则是有效的评估工具，杆振幅因素对评估结果的影响较强。

Prediction Methods of Category Ⅱ Pilot Induced Oscillations Due to Actuator Rate Limiting

Actuator rate limiting has been a causal or contributing factor for Pilot Induced Oscillations（PIO） ex- perienced on wire-control aircraft. Predicting PIO is difficult to do with any certainty and becomes even more difficult with the evolving complexity in newer aircraft designs. The closed-loop pilot-aircraft system is the re search object. The effect of actuator rate limiting is discussed. The prediction methods of category Ⅱ PIO due to actuator rate limiting and Open Loop Onset Point （OLOP） criterion are studied. The OLOP criterion＇s abili ty is evaluated to predict PIO on different aircraft longitudinal model with different rate limiting values using two pilot models inside different pilot inputs. The results of analysis show that OLOP can be a useful design tool, but the influence of stick vibration amplitude is strong.