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Eight-supporting-leg ultra-static vibration isolation platform with orthogonal configuration and fault-tolerant control method

A vibration isolation platform and platform technology, which is applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve problems such as unsatisfactory requirements, achieve the effect of reducing coupling effect, improving stability and reliability

Pending Publication Date: 2021-07-09
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

Therefore, with the application of high-precision equipment in the aerospace field, the traditional passive vibration isolation method can no longer meet the requirements

Method used

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  • Eight-supporting-leg ultra-static vibration isolation platform with orthogonal configuration and fault-tolerant control method
  • Eight-supporting-leg ultra-static vibration isolation platform with orthogonal configuration and fault-tolerant control method
  • Eight-supporting-leg ultra-static vibration isolation platform with orthogonal configuration and fault-tolerant control method

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Embodiment Construction

[0034] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0035] The invention conducts preliminary research on the reliability design problem of the eight-legged ultra-static platform, and the designed orthogonal decoupling configuration removes the influence of coupling from the structure and facilitates the design of the controller. The failure of the actuator is studied, the failure mode is analyzed, and the reconstruction model is built.

[0036] Ultra-static vibration isolation platform design

[0037] Such as figure 1 As shown, the ultra-quiet vibration isolation platform includes an upper platform, a lower platform, eight voice coil actuators, and eight springs; the lower platform of the ultra-quiet vibration isolation platform is fixedly connected to the space station, and the upper platform is actuated by eight voice coils. The device is suspended on the lower platform. Among them, four vertical actuators a...

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Abstract

The invention relates to an eight-supporting-leg ultra-static vibration isolation platform with an orthogonal structure and a fault-tolerant control method, and belongs to the field of space station optical load active vibration isolation control. According to the method, the reliability design problem of the eight-supporting-leg ultra-static platform is preliminarily researched, the influence of coupling is structurally relieved through the designed orthogonal decoupling configuration, and design of a controller is facilitated. The fault condition of the actuator is studied, the fault mode is analyzed, and a reconstruction model is built. The researched fault-tolerant control method can improve the reliability of the vibration isolation platform when the actuator breaks down.

Description

technical field [0001] The invention belongs to the field of active vibration isolation control for optical loads of space stations, and in particular relates to an eight-leg ultra-static vibration isolation platform with an orthogonal configuration and a fault-tolerant control method. Background technique [0002] At present, carrying out scientific experiments on the space station requires the space station to have an extremely high micro-vibration environment, especially for scientific experiments on optoelectronic equipment that are extremely sensitive to vibration, micro-vibration levels on the order of μg are required. However, due to the existence of various disturbance sources such as astronaut activities, fans, and refrigerators, the microvibration environment of the space station is prominent. [0003] The optical instruments of the space station are sensitive to low-frequency vibrations. Traditional passive vibration isolation is to add rigid elements and damping ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04F16F15/04
CPCG05B13/042F16F15/04
Inventor 刘磊马超李青
Owner NORTHWESTERN POLYTECHNICAL UNIV
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