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Analysis of Sensitive Parameters Affecting Unlocking Force of Finger Lock in Landing Gear
International Journal of Aerospace Engineering ( IF 1.4 ) Pub Date : 2021-01-13 , DOI: 10.1155/2021/6652056
Yu Hou 1 , Ming Zhang 1 , Hong Nie 2
Affiliation  

The mechanical characteristics of the unlocking force of the landing gear finger lock were studied in this paper, the influence of its diameter, fingertip angle, wear, and other factors on the unlocking force in one complete working cycle was analyzed, and the sensitive parameters that affect the unlocking force were obtained. Firstly, the unlocking force and wear of finger lock were calculated theoretically, and the changing rule of the unlocking force and wear with each parameter was obtained. Then, the validity of the correlation coefficient and model was verified by experiment. Finally, combined with the effective coefficient obtained from the experiment, the Archard wear model was used to simulate the change rule of lock force. The results show that in one complete working cycle, the inner surface diameter is negatively related to the unlocking force, fingertip diameter has little effect on the unlocking force, fingertip angle is negatively related to the unlocking force, and wear is positively related to the unlocking force; friction coefficient and fingertip angle are high sensitive parameters that affect the unlocking force, which have obvious effect on the unlocking force. The inner surface diameter, fingertip diameter of finger lock, and wear are the low sensitive parameters that affect the unlocking force, and the influence on the unlocking force is weak.

中文翻译:

影响起落架手指锁解锁力的敏感参数分析

研究了起落架手指锁的解锁力的机械特性,分析了其直径,指尖角度,磨损等因素在一个完整的工作循环中对解锁力的影响,并分析了敏感参数。获得了解锁力的影响。首先,从理论上计算了手指锁的解锁力和磨损量,得到了各参数解锁力和磨损量的变化规律。然后,通过实验验证了相关系数和模型的有效性。最后,结合实验获得的有效系数,使用Archard磨损模型来模拟锁紧力的变化规律。结果表明,在一个完整的工作周期中,内表面直径与解锁力负相关,指尖直径对解锁力影响很小,指尖角度与解锁力负相关,而磨损与解锁力正相关。摩擦系数和指尖角是影响解锁力的高敏感参数,对解锁力有明显影响。内表面直径,手指锁的指尖直径和磨损是影响解锁力的低敏感参数,并且对解锁力的影响较弱。摩擦系数和指尖角是影响解锁力的高敏感参数,对解锁力有明显影响。内表面直径,手指锁的指尖直径和磨损是影响解锁力的低敏感参数,并且对解锁力的影响较弱。摩擦系数和指尖角是影响解锁力的高敏感参数,对解锁力有明显影响。内表面直径,手指锁的指尖直径和磨损是影响解锁力的低敏感参数,并且对解锁力的影响较弱。
更新日期:2021-01-13
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