Large dynamic cubic Stewart active vibration control platform

Abstract

The invention discloses a large dynamic cubic Stewart active vibration control platform which comprises an upper platform body, a lower platform body, an actuator package, a sensor group and connecting pieces. The upper platform body and the lower platform body are each provided with three installation bases in the circumferential direction. Each installation base is provided with one connecting piece. The actuator package and the upper and lower platform bodies are installed through the connecting pieces. Actuator pairs are connected end to end. By means of the designed connecting pieces and the connection way between the actuator pairs and the connecting pieces, the position relation that the actuator pairs are installed with the same included angle is formed. The sensor group is installed on the upper surface of the upper platform body and used for detecting vibration accelerated speed signals of the upper platform body in six directions of degrees of freedom. The large dynamic cubic Stewart active vibration control platform has the advantages that the platform can work in the micro-amplitude low-frequency environment, the platform rotating space can range from -15 degrees to +15 degrees, the damping effect is about 98%, a vibration reduction control system is based on the platform, and the platform is convenient to operate and controllable.

Description

technical field [0001] The invention relates to a vibration damping device, in particular to a six-degree-of-freedom giant magnetostrictive active vibration control platform for active vibration damping with a relatively large dynamic range in a high-precision low-frequency environment. Background technique [0002] With the development of industrial technology, in the use of some precision instruments, such as modern aircraft, underwater submarines, space stations, etc., the vibration and aerodynamic force of the engine seriously affect the accuracy and reliability of the performance of precision instruments, which has a great impact on the base where the engine is installed. Stability requirements are also very high. Conventionally, increasing stiffness and adding damping materials are used to reduce vibration and noise, which not only increases weight, reduces performance, but also has very limited vibration and noise reduction effects. In the vibration reduction with ad...

AI Technical Summary

Problems solved by technology

However, due to the hysteresis characteristic of giant magnetostrictive materials, the output of the actuator also exhibits hysteresis characteristics.

This nonlinear factor will affect the control accuracy and control stability

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