Loading device based on six-degree-of-freedom parallel mechanisms

Abstract

The invention provides a loading device based on six-degree-of-freedom parallel mechanisms. The device is mounted on a base and comprises a front counter-force base, a six-degree-of-freedom parallel mechanism, a gravity balancing mechanism, a force measuring mechanism and a back counter-force base. The six-degree-of-freedom parallel mechanism comprises a lower hinge support connected with the front counter-force base, a hydraulic actuating mechanism connected with the lower hinge support and a moving platform connected with the hydraulic actuating mechanism; the gravity balancing mechanism comprises an air spring connected with the moving platform and a front end transition board connected with the air spring through a connecting support; the force measuring mechanism comprises a sensor on the moving platform; and the back counter-force base is in an adjustable connection with the base. The loading device has the advantages that parallel mechanism kinematic positive solution is used for measuring the output pose, investment for measurement equipment is simplified, measurement accuracy of the output pose is effectively improved; force measurement accuracy is effectively improved, and high-accuracy requirement for force measurement is met; and six-degree-of-freedom motion simulation and force loading test of parts can be performed.

Description

technical field [0001] The invention belongs to the technical field of simulation loading equipment, and in particular relates to a loading device based on a parallel mechanism with six degrees of freedom. Background technique [0002] In the existing technology, with the development of science and technology, the safety and reliability of various high-speed running equipment and large-scale structural parts have become important research work and technical support means for the equipment manufacturing industry, such as: large-scale wind turbine main shaft and high-speed rail The characteristics of fatigue, strength and life of key components such as vehicle end components play a vital role in ensuring the safety of people's lives and properties. Therefore, it is necessary to have a set of high-performance loading comprehensive test equipment, which can fully simulate the mechanical environment of the test piece under operating conditions, and realize high-precision motion, ...

AI Technical Summary

Problems solved by technology

The measurement used for the position of the test piece is obviously too low in accuracy to meet the requirements

In addition, since the acceleration sensor is not only sensitive to linear acceleration, but also sensitive to the roll angle and pitch angle of the carrier, when the carrier produces multi-degree-of-freedom coupling motion, the output value of the acceleration sensor is unreliable

From this point of view, the three-dimensional inertial navigation device cannot realize the measurement of the specimen pose

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