中文摘要：

有效飞机动力学转换可能会导致人机闭环失稳，在特定条件下会引起驾驶员诱发振荡。针对此问题，分析了致使驾驶员诱发振荡发生的主要因素，构建了人机闭环系统模型，推导了人机闭环系统失稳数学模型。研究了引起有效飞机动力学转换的可能因素，并运用时域和频域分析技术对有效飞机动力学转换所产生的影响进行了分析。案例研究表明：有效飞机动力学转换后，在特定条件下可引发驾驶员诱发振荡，但由此引起的驾驶员诱发振荡可以采用相关方法进行抑制。在恰当的抑制方法作用下，由有效飞机动力学转换引发的驾驶员诱发振荡不会产生灾难性的后果。

英文摘要：

The instability of aircraft-pilot system can be caused by effective vehicle dynamics transitions. The pilot induced oscillations may be introduced by effective vehicle dynamics transitions in given condition. To resolve the problem,the main factors which closely connected with pilot induced oscillations are analyzed. The model of closed-loop aircraft-pilot system is built. The mathematical model of closed-loop aircraft-pilot system instability is derived. The complication which may induce effective vehicle dynamics transitions is studied. The impact of effective vehicle dynamics transitions was analyzed by time and frequency domain technology. The case investigation prove that the pilot induced oscillations may be occur on condition that effective vehicle dynamics transformed in special instance, but it can be suppressed by given methods. If the preventing measure can work correctly, the pilot induced oscillations which are caused by effective vehicle dynamics transitions could not induce catastrophic flight accident.