Unlock instant, AI-driven research and patent intelligence for your innovation.

An asymmetric semi-active control system and method

A semi-active control and asymmetric technology, applied in the field of control, can solve the problems of low efficiency and achieve the effect of strong control ability and shortened control time

Active Publication Date: 2019-11-12
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for piezoelectric materials with asymmetric working voltage range, such as MFC, its working voltage range is -500V ~ +1500V, if the traditional semi-active control method is still used, the efficiency is low

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • An asymmetric semi-active control system and method
  • An asymmetric semi-active control system and method
  • An asymmetric semi-active control system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] figure 1 The asymmetric semi-active control system diagram provided for the present invention, such as figure 1 As shown, an asymmetric semi-active control system provided by the present invention includes: a piezoelectric device, a negative capacitance asymmetric control module and a switch switching control device; the negative capacitance asymmetric control module includes a negative capacitance asymmetric control circuit 1 And switch switching device 2; The piezoelectric device includes a piezoelectric cantilever beam 3 and a piezoelectric sheet 4; The piezoelectric sheet 4 is pasted on any one of the piezoelectric cantilever beam 3 near the center line of the fixed end; the piezoelectric device The switching control device includes: a laser displacement sensor 5 and a switching signal conditioning module 6; the laser displacement sensor 5 is connected to the switching signal conditioning module 6; the switching signal conditioning module 6 is connected to the switc...

Embodiment 2

[0056] Figure 4 Negative capacitance asymmetrical control circuit diagram provided for the present invention, such as Figure 4 As shown, the difference between this embodiment and Embodiment 1 is that the negative capacitance asymmetrical control circuit specifically includes: an operational amplifier OPA445, a first resistor R1, a second resistor R2, a third resistor R3, a capacitor Cg, and a first resistor A diode D1; the noninverting input terminal of the operational amplifier is connected to the piezoelectric device and one end of the second resistor R2; the inverting input terminal of the operational amplifier is connected to one end of the first resistor R1, The first end of the third resistor R3 is connected to the first end of the capacitor Cg; the second end of the third resistor R3 is connected to one end of the first diode D1; the output of the operational amplifier end is connected with the other end of the first diode D1, the other end of the second resistor R2...

Embodiment 3

[0059] Figure 5 The flow chart of the asymmetric semi-active control method provided by the present invention, such as Figure 5 As shown, an asymmetric semi-active control method provided by the present invention is applied to the asymmetric semi-active control system of Embodiment 1 or Embodiment 2, including:

[0060] Step 301: The switching device obtains the switching signal generated by the switching control device; the switching control device includes a laser displacement sensor and a switching signal conditioning module, specifically including:

[0061] The laser displacement sensor acquires a vibration displacement amplitude signal of the piezoelectric device;

[0062] The switch signal conditioning module acquires the vibration displacement amplitude;

[0063] The switch signal conditioning module extends backward for a period of time according to the acquired vibration displacement amplitude to obtain a delayed vibration displacement amplitude; the extended time...

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

No PUM Login to View More

Abstract

The invention discloses an asymmetric semi-active control system and method. The system comprises a piezoelectric device, a negative capacitance asymmetric control circuit, a switch changeover deviceand a switch changeover control device, wherein the negative capacitance asymmetric control circuit comprises an operational amplifier, a first resistor, a second resistor, a third resistor, a capacitor and a first diode, a same-phase input end of the operational amplifier is connected with the piezoelectric device, one end of the second resistor and a first end of the third resistor, a second endof the third resistor is connected with one end of the first diode, an inverse-phase input end of the operational amplifier is connected with one end of the first resistor and a first end of the capacitor, an output end of the operational amplifier is connected with the other end of the first diode, the other end of the second resistor and the other end of the first resistor, and a second end ofthe capacitor is connected with the switch changeover device. The asymmetric semi-active control system and method has the advantage that a symmetric control voltage signal is adjusted to an asymmetric control voltage signal.

Description

technical field [0001] The invention relates to the technical field of control, in particular to an asymmetric semi-active control system and method. Background technique [0002] With the continuous development of the aerospace industry, the large-scale, low rigidity and flexibility of spacecraft is an important development trend at present. At present, the commonly used vibration control methods of spacecraft are passive control, active control based on piezoelectric materials and semi-active control of synchronous switch damping. However, in the traditional synchronous switch damping semi-active control system, the voltage at both ends of the piezoelectric element is reversed symmetrically, that is, the maximum positive voltage and the maximum negative voltage of the piezoelectric element are equal during operation. However, for piezoelectric materials with an asymmetric working voltage range, such as MFC, its working voltage range is -500V to +1500V. If the traditional ...

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
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G05D19/02
CPCG05D19/02
Inventor 季宏丽裘进浩刘若愚吴义鹏张超郭宇飞
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS