Three-freedom-degree swing platform based on parallel mechanism

Abstract

The invention provides a three-freedom swing platform based on a parallel mechanism. The three-freedom swing platform based on the parallel mechanism comprises a fixed platform, a movable platform, three driving branch mechanisms and a static balance device, wherein the three driving branch mechanisms are connected with the fixed platform and the movable platform, the driving branch mechanisms are identical in structure and are evenly and symmetrically arranged between the fixed platform and the movable platform, transverse swinging, longitudinal swinging and ascent and descent movement of the movable platform are achieved through linkage of the driving branch mechanisms, and the static balance device is arranged at the center of the driving branch mechanisms, connected with the center of the fixed platform and the center of the movable platform and used for balancing the movable platform and bearing part of gravity. The three-freedom swing platform based on the parallel mechanism has the advantages of being high in bearing capacity, large in work space and the like and is particularly suitable for movement simulation tests of an oversized load with a large structure and a large weight.

Description

technical field [0001] The invention belongs to the technical field of motion simulation equipment, and in particular relates to a large-load three-degree-of-freedom swing table based on a parallel mechanism. Background technique [0002] The research on parallel mechanisms can be traced back to the 1940s. In recent decades, with the deepening of its research, parallel mechanisms have been more and more widely used in flight simulation, vehicle road simulation, aviation and navigation equipment swing simulation, robots, Parallel machine tools, space docking technology and other fields, the most famous of which is the Stewart six-degree-of-freedom motion platform. However, in many cases, the simulation does not require six-degree-of-freedom motion. For example, when simulating a ship swaying on the sea, it often only needs three to four degrees of freedom to meet the requirements. At this time, the use of a six-degree-of-freedom motion platform exists A certain waste. A mot...

AI Technical Summary

Problems solved by technology

Compared with the six-degree-of-freedom parallel kinematic mechanism, the few-degree-of-freedom mechanism is constrained by some degrees of freedom, so its driving elements are also reduced accordingly, but the constraints of some degrees of freedom require the design of a special mechanism to achieve

At present, the research on the mechanism with few degrees of freedom is not very in-depth. It has several degrees of freedom, but these degrees of freedom may not be the absolute and complete degrees of freedom of the original pure free body, but relative with certain restrictions. degrees of freedom, i.e. incomplete degrees of freedom

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