Double-facade rotary mass center eccentricity test device

Abstract

The invention discloses a double-facade rotary mass center eccentricity test device, which comprises a base, a fixed test platform, a mobile test platform, and a grating positioning mechanism. The fixed test platform includes a fixed test box, a fixed sensor, a fixed rotary mechanism, a fixed V-shaped roller frame, fixed lifting mechanism, mobile test bench includes a mobile test box, a mobile sensor, a mobile slewing mechanism, a mobile V-shaped roller frame, and a mobile lifting mechanism. The fixed V-shaped roller frame is fixed on the fixed rotary mechanism, the rotary frame of the fixed rotary mechanism is fixed on the sensor before the fixed sensor is fixed, the fixed rotary leg of the fixed rotary mechanism floats on the sensor after the fixed sensor is fixed, and the V-shaped roller is moved The frame is fixed on the moving slewing mechanism, the moving slewing frame of the moving slewing mechanism is fixed on the sensor before the moving sensor moves, and the moving slewing mechanism moves the slewing foot floating on the sensor after the moving sensor moves.

Description

technical field [0001] The invention belongs to the field of mass center eccentricity testing, and relates to a double-facade rotary mass mass center eccentricity testing device. Background technique [0002] For large-scale missiles and arrows, especially those with complex shapes such as dispensers, combined surface-symmetrical missiles, and unmanned aerial vehicles, the traditional measurement method-bracket measurement method is adopted, which has heavy weight, complex structure, and large attached load. , it is difficult to meet the test requirements. [0003] The double-facade test technology and test method are theoretically feasible and have practical significance. However, it is necessary to ensure that multiple points in the two test planes are simultaneously stressed and conform to the force characteristics of the sensor. The processing, manufacturing, installation and commissioning of the test bench are very demanding. , the internal force of the structure canno...

AI Technical Summary

Problems solved by technology

Since the sensor adopts the surface contact type, the sensor cannot be deformed or twisted after installation. There are eight fixed contact surfaces between the sensor on the two test benches, the test bench and the V-shaped roller frame. According to the principle of moment balance, the fulcrum and the force point must be known Change the surface contact surface to point contact. In theory, the center points of the four bottom mounting surfaces are the force points of the sensor and the test table, and the center points of the other four upper mounting surfaces are the force points of the sensor and the V-shaped roller frame. To ensure that the positions of the eight stress points remain unchanged at the same time, the technical requirements for manufacturing, installation, commissioning, and testing are obviously high, and it is also difficult to achieve

[0005] Due to the uncertainty of the eight contact points of the sensor, it will affect the change of the moment arm, thus affecting the accurate calculation of the torque balance formula

In addition, the contact point between the measured body and the original roller frame is a line, and the force point is uncertain, which greatly affects the test accuracy

[0006] The upper plane of the original double-facade sensor is fixed on the V-shaped roller frame, and the lower plane is fixed on the test table, both of which are rigidly connected. Due to the processing and installation, the sensor will generate internal force. It will also cause structural internal forces, which cannot be released, causing the sensor to not remove the tare normally, which greatly affects the test accuracy

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