Dynamic modeling method for aircraft high-lift system

Abstract

The invention discloses a dynamic modeling method for an aircraft high-lift system. The dynamic modeling method comprises the steps of: 1, calculating rigidity keq of all torque tubes between actuators; 2, establishing a mathematical model of a speed reducer in the transmission line system; 3, establishing a combined mathematical model of a composite mechanism between the transmission line systemand the high lift device; 4, calculating the rotational inertia of each composite mechanism and flap; and step 5, carrying out dynamic analysis by using a Lagrange method and the like. The dynamic model of the high-lift system is established, the dynamics problem in the development of the aircraft high-lift system is solved, an accurate fault mechanism can be provided for faults in an iron bird test, in the design of the high-lift system, the key problems of speed reducer protection threshold design, system fault load calculation and the like are solved, the development efficiency is improved,the cost of the high-lift system is greatly reduced, and the development bottleneck problem is solved.

Description

technical field [0001] The invention belongs to the technical field of aircraft high-lift system dynamics design and verification, and in particular relates to an aircraft high-lift system dynamics modeling method. Background technique [0002] Large jet transport aircraft and passenger aircraft require efficient high-lift systems and high-lift devices. The design of high-lift systems is the design content of modern aircraft. Since the mass of the high-lift device is often large, the dynamic effect cannot be ignored in the design, and failures or problems caused by dynamic factors are often encountered during ground tests and flights. The high-lift systems of the ARJ21-700 aircraft and C919 aircraft developed in my country generally purchase shelf products from well-known foreign suppliers. Foreign suppliers generally do not disclose the dynamic design problems of the high-lift systems with technical secrets. Such aircraft high-lift systems often The high-lift system is much...

AI Technical Summary

Problems solved by technology

The high-lift systems of the ARJ21-700 aircraft and C919 aircraft developed in my country generally purchase shelf products from well-known foreign suppliers. Foreign suppliers generally do not disclose the dynamic design of the high-lift systems with technical secrets. Such aircraft high-lift systems often The high-lift system is much heavier than the actual requirements of the aircraft design, and the load protection threshold of the actuating parts and driving parts is high. The high-lift system is not economical and the price is very expensive.

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