Drop test load measurement method and device for unmanned helicopter with skid-type undercarriage

Abstract

The invention discloses a drop test load measurement method and device for an unmanned helicopter with a skid-type undercarriage. The device comprises a load measurement system, an unmanned helicoptersimulation test piece, a ground supporting system and a hoisting control system, the hoisting control system is arranged on the ground supporting system and is used for hoisting the unmanned helicopter simulation test piece, completing double-skid landing and / or forward flying or side flying landing with speed of the unmanned helicopter simulation test piece and controlling the falling height ofthe unmanned helicopter simulation test piece; the load measurement system is arranged on a supporting platform of the ground supporting system and used for collecting impact load and acceleration when the unmanned helicopter simulation test piece lands. According to the method, the dynamic response of the unmanned helicopter drop test load sensor and the acceleration sensor is acquired by using the dynamic acquisition system, the equivalent ground impact load is acquired, and the problem that the feedback load cannot be accurately identified and measured when the unmanned helicopter undercarriage falls onto the ground is solved.

Description

technical field [0001] The invention belongs to the technical field of drop shock tests of unmanned helicopters, in particular to a ground impact load measurement method and device for drop shock tests of unmanned helicopters with skid-type landing gear. Background technique [0002] In order to improve aircraft quality and ensure aircraft flight safety, aircraft design institutes and other research and development and testing institutions usually use drop shock tests to obtain dynamic responses and impact loads during aircraft landing to guide aircraft design; reasonable test plans and suitable measurement methods It is an important index to determine the accuracy and authenticity of the drop test. However, the three-way measurement platform used in the large-scale aircraft drop test has a complex structure, a large floor space, and a large impact tonnage. As far as the design and development of helicopters are concerned, the research and development costs are limited, the...

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Problems solved by technology

However, the three-way measurement platform used in the large-scale aircraft drop test has a complex structure, a large floor space, and a large impact tonnage. For the design and development of helicopters, the research and development costs are limited, the design cycle is short, the tonnage of the body is small, the impact response sensitivity is high, and the aircraft maneuverability is low, so it is not suitable to use this kind of test equipment for drop shock tests

[0003] In addition, the current scope and method of drop shock tests are only considered for the double-skid landing conditions, while ignoring the side flight or forward flight landing with speed, but for the helicopter with skid landing gear, the Speed ​​forward flight or side flight landing is a common phenomenon in its use

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