Method for controlling lifting and vibrating motions of large-span cantilever truss

Abstract

The invention discloses a method for controlling lifting and vibrating motions of a large-span cantilever truss. The following three methods for controlling the cantilever truss are provided by the invention: loading vibration on the cantilever truss at an initial position, lifting the cantilever truss to a specified height, and lifting the cantilever truss to the specified height and then loading the vibration on the cantilever truss. According to the method, a slow-start slow-stop lifting method is adopted to control a large hydraulic cylinder to lift the cantilever truss, and a slow-start slow-stop vibrating method is adopted to control a small hydraulic cylinder to load the vibration on the cantilever truss. According to the method, the shortage that the structure of the cantilever truss generates excessive impact possibly due to a fact that the speed and the accelerated speed are changed suddenly in the lifting and vibrating process of the cantilever truss in the prior art are overcome. Therefore, the method has the advantages of safe control process and simple control method.

Description

technical field [0001] The invention belongs to the technical field of machinery, and further relates to a lifting and vibration motion control method of a large-span cantilever truss in the field of mechanical motion control. The invention can realize a large-scale lifting of the large-span cantilever truss from a self-suspending state to a specified height, and a smooth motion control of a small-amplitude vibration, so as to simulate the large-deflection bending deformation of the wing and the accompanying micro-amplitude vibration during the flight of a large aircraft. Background technique [0002] During the flight of the aircraft, the wings will go through two processes of lifting and vibrating. If the flight environment test is carried out to the long-span wing, a real and feasible test platform is needed. The design and implementation of the large-span cantilever truss lifting and vibration motion control method can effectively simulate the flight environment of the ...

AI Technical Summary

Problems solved by technology

The disadvantage of the lifting method provided by this patent application is: at the initial and stop moments of lifting, the lifting speed and lifting force may change suddenly, causing the truss to vibrate, and the structure may have an impact

The deficiencies in the vibration method disclosed in this patent application are: the amplitude, speed and acceleration of the vibration are difficult to control during the vibration process, the vibration is not stable, and there may be sudden changes in the vibration speed and acceleration at the initial moment of vibration and at the moment of stop, causing structural damage. shock

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