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Six-degree-of-freedom vibration isolation platform based on Stewart parallel mechanism

A technology of vibration isolation platform and degree of freedom, which is applied in the direction of non-rotational vibration suppression, aerospace vehicle guidance device, etc., and can solve the problems of high-frequency disturbance powerlessness

Active Publication Date: 2014-02-19
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
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Problems solved by technology

Under normal circumstances, in the above-mentioned vibration disturbances, the satellite attitude and orbit control system can compensate for low-frequency disturbances (generally below 1Hz), but it is powerless for high-frequency disturbances

Method used

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  • Six-degree-of-freedom vibration isolation platform based on Stewart parallel mechanism
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  • Six-degree-of-freedom vibration isolation platform based on Stewart parallel mechanism

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Embodiment Construction

[0016] Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention Modifications in equivalent forms all fall within the scope defined by the appended claims of this application.

[0017] The Stewart parallel mechanism (also known as the Stewart platform) is a parallel mechanism with six degrees of freedom in space. It consists of two upper and lower platforms and six parallel free telescopic rods. The gram hinge is connected with the upper and lower platforms. The lower platform (base) of the mechanism itself is stationary, and the upper platform (moving platform) can obtain the required position and attitude by controlling the independent movemen...

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Abstract

The invention discloses a six-degree-of-freedom vibration isolation platform based on a Stewart parallel mechanism. Through the combination of active vibration isolation technology, passive vibration isolation technology, the optimized design of the spatial six-degree-of-freedom parallel movement mechanism, the design of flexible mechanisms and the like, designed is the six-degree-of-freedom vibration isolation platform which is capable of rigidly transmitting low-frequency attitude control signals and attenuating high-frequency jamming signals and which is resonance free. A control moment gyro group is integrated in the platform; multi-degree-of-freedom disturbance produced by the control moment gyro group is converted into six independent unidirectional linear vibrations. Telescopic bars are exactly the same in structural design and all provided with an active vibration isolation unit and a passive vibration isolation unit, which are used to isolate the six independent linear vibrations respectively.

Description

technical field [0001] The invention relates to scientific technologies such as parallel mechanism, multi-body system dynamics and control, vibration isolation, etc., and is applied to the field of spacecraft attitude control and vibration isolation, especially a six-degree-of-freedom vibration isolation platform. Background technique [0002] During the orbital operation of the spacecraft, the high-speed rotation of the rotating parts on the star (flywheel, gyroscope, etc.), the stepping motion of the large-scale controllable component drive mechanism, the ignition of the thruster during the orbit change and attitude adjustment, the induction of alternating cold and heat when the large flexible structure enters and exits the shadow Disturbances, etc. will cause the star to produce a vibration response with a small amplitude and a high frequency, which is called spacecraft micro-vibration. Due to the small amplitude of micro-vibration dynamic environmental response, it will ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64G1/38B64G1/28F16F15/02F16F15/06
Inventor 杨小龙陈柏吴洪涛李耀戴文伟孙宏丽
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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