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扭矩法在刹车防滑效率试飞的工程应用

2021-07-15胡泽玮

科技资讯 2021年9期

胡泽玮

摘  要:刹车系统防滑效率的确定是民用飞机刹车系统试飞中的重要科目,其结果直接影响到民用飞机的使用。该文采用扭矩法来验证民用飞机刹车系统防滑效率,提出了利用止转刹车试验的数据计算机轮惯性矩的新思路,并通过该方法应用于ARJ21-700飞机的数据处理当中,结果证明采用扭矩法得到的结果是可信的,扭矩法能够应用于民用飞机刹车防滑效率试飞验证。此技术对其他同类飞机具有通用性,对于今后民用飞机在刹车系统妨碍效率试飞具有参考价值。

关键词:民用飞机  适航审定  刹车防滑效率  扭矩法  试飞技术

中图分类号:V217+.1                            文献标识码:A文章编号:1672-3791(2021)03(c)-0076-03

Engineering Application of Torque Method in Flight Test of Brake Anti-slip Efficiency

HU Zewei

(Chinese Flight Test Establishment, Xi'an, Shaanxi Province, 710000  China)

Abstract: The determination of anti-skid efficiency of braking system is an important subject in the flight test of civil aircraft braking system, and its results directly affect the use of civil aircraft. In this paper, the torque method is used to verify the anti-skid efficiency of civil aircraft braking system, and a new idea of calculating wheel inertia moment by using the data of non rotation braking test is proposed. The method is applied to the data processing of ARJ21-700 aircraft. The results show that the results obtained by the torque method are reliable, and the torque method can be applied to the flight test verification of anti-skid efficiency of civil aircraft braking. This technology is universal to other similar aircraft, and has reference value for future civil aircraft in the efficiency test of brake system in China.

Key Words: Civil aircraft; Airworthiness certification; Brake anti-slip efficiency; Torque method; Flight test technology

系统防滑效率的确定是民用飞机刹车系统试飞中的重要科目。CCAR25R4中规定,地面最大刹车摩擦系数必须考虑湿跑道上防滑系统的效率并加以调整。必须在平整湿跑道上进行飞行试验演示防滑系统的工作,并且必须确定它的效率[1]。在防滑系统效率的试飞试验中,AC25-7C中推荐了两种可接受的方法,即机轮滑动法和扭矩法[2]。该文首次采用扭矩法来验证民用飞机刹车系统防滑效率,对该方法的试飞方法和数据处理方法进行了详细的论证。

1  刹车防滑效率试飞方法

在扭矩法刹车防滑效率试飞中,采用湿跑道中断起飞的试飞方法[3]。根据适航条款要求,每一构型进行3次完整刹停。由于试验目的是验证飞机防滑系统效率,因此被试飞机重量选择飞机运营的正常重量,验证重量应大大低于最大能量终止起飞的边界重量。……

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