Helicopter rotor balance real-time monitoring and adjusting device

Abstract

The invention discloses a helicopter rotor balance real-time monitoring and adjusting device, which comprises intelligent variable pitch pull rods, a data acquisition unit, an information processing module, an airborne control module and a collector ring, and is characterized in that the intelligent variable pitch pull rods are mounted on each blade of a helicopter; the data acquisition unit is used for acquiring the height of a cone and a vibration signal of a rotor and transmitting the signals to the information processing module; the information processing module carries out resolving and filtering and sends the processed cone height and vibration signals to the airborne control module; the airborne control module inputs the cone height and vibration signals into the control model, and the driving torque, output by the control model, of the intelligent variable-pitch pull rod is transmitted to the intelligent variable-pitch pull rod through the collector ring to adjust the expansion amount of the stroke pull rod. The method can effectively overcome the defects that the adjusting capacity of a propeller hub counterweight adding mode is limited and helicopter shutdown adjustment is needed, the height of a rotor cone is adjusted in real time to reduce vibration, and the technical level of helicopter rotor balance maintenance is integrally improved.

Description

technical field [0001] The invention belongs to the field of helicopter testing, in particular to a real-time monitoring and adjusting device for helicopter rotor balance. Background technique [0002] Due to the working characteristics of the helicopter rotor and other rotating parts, vibration has become an inherent characteristic of the helicopter. Based on the existing technology, the vibration of the helicopter cannot be completely eliminated. There are three main ways to reduce vibration: adjustment of the trailing edge trim, adjustment of the hub weight and Rotor cone adjustment. [0003] Trailing tab adjustment is a method of reducing vibration by adjusting the trailing tab on the blade. This method can realize real-time adjustment, but due to the small shape of the trailing edge trim in this way, it is found in actual operation that the trim of some blades is not sensitive, even if the trailing edge trim is adjusted to the maximum angle, the dynamic balance value ...

AI Technical Summary

Problems solved by technology

The traditional maintenance method based on rotor balance cannot achieve real-time adjustment. It still needs to manually adjust the pitch-variable rod after stopping on the ground to achieve balance adjustment. After the adjustment, it still needs to be restarted to verify the adjustment effect, which cannot cover the full cycle of helicopter use and all flight states. And the adjustment is also a compromise of the vibration level in the local state

[0006] However, there is currently no helicopter dynamic balance adjustment method with strong adjustment ability and real-time adjustment ability covering the whole cycle of helicopter use and all flight states.

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