Determination of Flight Operation in Veer-off Avoidance during Landing

• Main Authors: Yu-Ming Huang, 黃裕明
• Other Authors: SzuYing Tan
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/80346824000233087108

碩士 === 中華科技大學 === 航空機械系飛機系統工程碩士班 === 103 === Wind shear is the type of wind field with varying magnitude and/or direction as encountered by an airplane. Landing in horizontal wind shear has been a safety issue for all types of airplanes. The current airplane design practice and certification account only for constant crosswind. In reality, most crosswind can be classified as wind shear to a certain level. As a result, accidents or incidents, such as hard or porpoise-style (i.e. jumping) landing, oscillation in roll, runway veer-off after touchdown, etc., have been occurring. Although pilot training has been again and again emphasized, unfortunately existing training simulators for landing operation in wind shear have serious shortcomings and may lead to negative training. The latter implies the possibility that when pilots apply what are learned in simulators, the situation may get worse as pointed out by NASA researchers. It should be emphasized that these wind shear effects can also be induced by airplane motion, not just by atmospheric disturbances. System consisting of fuzzy-logic numerical models will be presented to show its effectiveness with several accident flights. Emphasis is placed on finding observable parameters for pilots to make appropriate actions. The latter involve runway veer-off in strong wind shear or crosswind. The results in simulations of fuzzy-logic numerical models have been shown to be much more realistic in wind shear than what can be expected with the existing simulators.