Vibration measurement device of hinged flexible board structure with rotary center and control method thereof
A technology for structural vibration and measuring device, which is used in measuring devices, vibration testing, and testing of machine/structural components, etc. It can solve problems such as difficulty in controlling vibration of large flexible structures and flexible manipulators, weak damping, and equipment fatigue damage.
Inactive Publication Date: 2013-11-13
SOUTH CHINA UNIV OF TECH
View PDF1 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
If the vibration is not effectively suppressed, its low-frequency and large-amplitude vibration will last for a long time, which will affect the stability and pointing accuracy of the system, and even cause fatigue damage to the equipment
Especially in space conditions, there is no air damping, so the damping is weak, and the vibration of large flexible structures and flexible manipulators is more difficult to control
Therefore, vibration detection and control of spatially hinged flexible plate structures is a challenging problem.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0047] As shown in Figure 1, the rigid body 2 of the rotation center is fixed on the base 1 through bearing support, and can rotate freely relative to the base 1. The tripod I3 and the tripod II4 are respectively installed on both sides of the rigid body 2 of the rotation center. The rectangular flexible plate I7 , the rectangular flexible board III24 are fixed on the tripod I3 and the tripod II4 respectively, the flexible board I7 and the flexible board II12 are connected by the hinge I9 and the hinge II16, the flexible board III24 and the flexible board IV30 are connected by the hinge III27 and the hinge IV35;
[0048] CCD camera Ⅰ 20 and CCD camera Ⅱ 22 are installed on the rigid body 2 of the rotation center through the camera bracket 21, and can rotate with the rigid body 2 of the rotation center. The lenses of the two cameras are respectively aimed at the two groups of hinge plates, and are used to detect the flexible hinge plates on both sides. vibration;
[0049] The r...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a vibration measurement device of a hinged flexible board structure with a rotary center and a control method thereof. The device comprises a hinged board body with a rotary center, a detection and driving part and a control part, wherein a triangular frame which is fixed at the center to rotate a rigid body is connected with two groups of flexible boards which are connected through a hinging chain; a piezoelectric ceramic sheet driver and a resistance strain sheet type transducer are adhered to a flexible board structure; an acceleration transducer, a piezoelectric stack driver and a shape memory alloy (SMA) driver are mounted on the hinged flexible boards; two CCD (Charge Coupled Device) cameras are mounted on the center rigid body and can be used for detecting the vibration of the flexible boards through edges; and the resistance strain sheet type transducer and the acceleration transducer can be further used for detecting the vibration of the hinged flexible boards respectively. After detected signals are fed back and are carried out by a control algorithm, actions of the piezoelectric sheet driver, the piezoelectric stack driver and the shape memory alloy (SMA) driver are respectively controlled by outputs of the signals; and the control part is used for processing detected vibration signals and carrying out corresponding treatment.
Description
technical field [0001] The invention relates to the field of space flexible structures, in particular to a center-rotating hinged flexible plate structure vibration measurement device and control method. Background technique [0002] A large number of large flexible structures, such as solar panels, are used in spacecraft, using ultra-light and ultra-thin materials. This is to improve the efficiency of the vehicle and reduce the cost of launching, and increase the weight of the payload. Flexible accessories such as solar wings on spacecraft can be regarded as hinged structures with hinges as connectors. During the transportation and launch of the spacecraft, the solar cell array is folded and pressed tightly on the surface of the satellite; after entering orbit, the solar cell array is automatically deployed and locked in place by the torque generated by the coil spring. [0003] The vibration problem of the hinged flexible plate structure will inevitably be brought about b...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01M7/02
Inventor 邱志成
Owner SOUTH CHINA UNIV OF TECH