Optical Tau in Boundary Avoidance Tracking - A New Perspective on Pilot Induced Oscillations
Optical Tau in Boundary Avoidance Tracking - A New Perspective on Pilot Induced Oscillations
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边界回避跟踪中的光学 Tau——导频诱发振荡的新视角
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
M. Jump
中科院分区：
文献类型：
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作者：
Linghai Lu;G. Padfield;M. Jump
最近作为自然引导模型引入飞行控制学科的 Tau 理论被证明提供了一种替代方法来预测一类不利的飞机-飞行员耦合，称为边界避免跟踪 (BAT) 事件和 PIO。这些先前已被建模为使用时间相关反馈增益开发的离散事件。利用接触时间变量光学 tau 的前瞻性性质，提出了一种新方法来模拟此类现象，并确定此类事件和 PIO 的临界起点。在本研究中，该方法已用于演示旋翼机轨迹跟踪机动中的 tau 引导，并预测可能发生 BAT 事件或 BAT PIO 的条件。此外，运动和控制活动与 tau 导数之间的强相关性为飞行员的感知系统在视觉引导过程中直接与光学变量一起工作的假设提供了依据。利物浦大学进行的飞行模拟测试以及国家研究委员会（加拿大）ASRA 飞行模拟器进行的补充飞行测试的结果支持 tau 控制假设。该理论提出了一些方法，可以提醒飞行员注意这种不利的飞机-飞行员耦合带来的迫在眉睫的威胁。
Tau theory, recently introduced to the flight control discipline as a model for natural guidance, is shown to provide an alternative approach to predicting a class of adverse aircraft-pilot couplings described as boundary-avoidance tracking (BAT) events and PIOs. These have previously been modelled as discrete events developed using time dependent feedback gains. Drawing on the prospective nature of the time-to-contact variable, optical tau, a new method is proposed for modelling such phenomenon, and also determining the critical incipience for this class of event and PIOs. In the present study, the approach has been used to demonstrate tau guidance in a rotorcraft trajectory tracking manoeuvre and to predict the conditions under which a BAT event or BAT PIO may occur. In addition, a strong correlation between motion and control activity and the derivatives of tau adds substance to the hypothesis that the pilot’s perceptual system works directly with optical variables during visual guidance. Results from flight simulation tests conducted at The University of Liverpool, and complementary flight tests carried out with The National Research Council (Canada) ASRA in-flight simulator, support the tau control hypothesis. The theory suggests ways that pilots could be alerted to the impending threat of such adverse aircraft-pilot couplings.