Non-destructive rudder system mode testing device

Abstract

The invention discloses a non-destructive rudder system mode testing device. The non-destructive rudder system mode testing device comprises a testing rudder surface, an excitation clamp, excitation equipment, a laser vibration measuring device, a loading system, an air pump, and a measurement and control system. The excitation clamp is contacted with the testing rudder surface, and is used to clamp the testing rudder surface, and the excitation equipment is disposed on the excitation point position of the testing rudder surface. The laser vibration measuring device adopts laser to measure the vibration response of the testing rudder surface, and is not contacted with the rudder surface. The loading system is disposed on the static load loading position of the testing rudder surface, and is used to transmit external force to the testing rudder surface in an extruding way. The air pump is connected with the loading system, and is used to provide an air source. The measurement and control system is used to control the excitation equipment, and is used for data exchange with the excitation equipment, and the laser vibration measuring device is used to acquire the vibration responding signal of the testing rudder surface, and is used to process and analyze testing data. The testing device is advantageous in that installation is convenient, and damages on the rudder surface are prevented; a problem of inability of carrying out excitation, loading, and measurement in the rudder system mode tests without damaging the coating of the rudder surface is solved; and testing precision is high.

Description

technical field [0001] The invention belongs to the technical field of modal test of a rudder system, and in particular relates to a modal test device of a nondestructive rudder system. Background technique [0002] In the design and finalization process of spacecraft such as strategic missiles and large launch vehicles, understanding and mastering the vibration characteristics of each link of its control system is related to the success or failure of the missile (arrow) flight. The rudder system is the actuator of the spacecraft control system, and the accuracy of its modal parameters directly affects the design accuracy of the control system. Therefore, it is necessary to obtain accurate modal parameters of the rudder system. [0003] Since the rudder system has an installation gap, its modal test needs to use the test method of exciter excitation and external static load to reduce the influence of the gap on the test results as much as possible. [0004] For the rudder s...

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Problems solved by technology

[0004] For the rudder system with heat-resistant coating on the rudder surface, the surface coating cannot be damaged during the test. However, the existing excitation, loading and measurement methods all use glue or directly punch holes on the rudder surface, which will cause the rudder surface to be coated. Delamination or damage to the structure of the rudder surface

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