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Zero-rigidity vibration isolating method for electrostatic suspension type two-stage non-towing platform

An electrostatic suspension and no-drag technology, applied in the field of zero-stiffness vibration isolation, can solve the problems of incomplete vibration isolation and achieve better stability

Inactive Publication Date: 2018-07-13
CHINA ACADEMY OF SPACE TECHNOLOGY
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Problems solved by technology

[0005] The technical problem solved by the present invention is: Aiming at the problems existing in the prior art, a zero-stiffness vibration isolation method for the electrostatically suspended two-stage non-drag platform is proposed, which solves the problem that the electrostatic negative stiffness of the electrostatically suspended platform is not all zero. The problem of not being able to completely isolate the vibration formed

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  • Zero-rigidity vibration isolating method for electrostatic suspension type two-stage non-towing platform
  • Zero-rigidity vibration isolating method for electrostatic suspension type two-stage non-towing platform
  • Zero-rigidity vibration isolating method for electrostatic suspension type two-stage non-towing platform

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Embodiment Construction

[0034] In the patent with the publication number CN104158431A, an electrostatic levitation space-based ultra-quiet platform system is proposed, including a quiet reference system, a load platform, an electrode cavity on the star, a capacitance detection circuit, a digital control system, a drive circuit and a micro-thruster , which realizes a two-stage drag-free system that uses weak electrostatic negative stiffness for low-stiffness vibration isolation and uses controllable feedback electrostatic force for active vibration reduction. The zero-stiffness vibration isolation method provided by the present invention is in this platform system Implemented, by introducing the displacement of the suspended load platform relative to the satellite parent body, the output of the suspension controller is nonlinearly modulated to compensate for the electrostatic force change caused by the displacement, so as to achieve zero stiffness and ensure that the modulated system electrostatic force...

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Abstract

The invention relates to a zero-rigidity vibration isolating method for an electrostatic suspension type two-stage non-towing platform. Through introducing displacement of a suspension load platform,the output of a suspension control algorithm is subjected to nonlinear modulation to compensate static electricity changes caused by displacement, so that static negative rigidity is eliminated, and suspension vibration isolation with zero rigidity is achieved. According to the method, absolute zero-rigidity vibration isolation can be realized, the vibration energy in the wide frequency band rangecan be effectively inhibited, and the zero rigidity is constructed, so that a two-stage system is enabled to be completely decoupled, platform systems can be independently designed and do not influence each other, the stability is better, and the method is simple in process.

Description

technical field [0001] The invention relates to a zero-stiffness vibration isolation method for an electrostatic suspension type two-stage dragless platform, belonging to the technical field of electrostatic suspension control and precision vibration reduction. Background technique [0002] The in-depth development of activities such as high-precision space measurement, high-resolution earth remote sensing, and ultra-precision space science experiments have put forward new requirements and challenges for space-based vibration isolation and vibration reduction platforms. The two-stage dragless space-based ultra-static platform based on electrostatic suspension is a new type of vibration isolation and vibration reduction platform. The system is divided into three independent parts: the satellite parent body, the payload platform and the reference mass. The space operation mode of the system is: the satellite parent body and the load platform realize non-contact isolation throu...

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Application Information

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IPC IPC(8): F16F15/02
CPCF16F15/02
Inventor 范达贾海鹏
Owner CHINA ACADEMY OF SPACE TECHNOLOGY
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