Piezoelectric intelligent torsional control lever

Abstract

The invention discloses a piezoelectric intelligent torsional vibration control rod. The lower end of the hollow round rod is equipped with the first connecting block, the annular piezoelectric torsion driver, and the second connecting block sequentially from top to bottom, and the upper end of the hollow round rod is equipped with the third connecting block. Sensors are mounted on the inner or outer surface of the hollow rod. When there is torsional deformation or torsional vibration at the connection end relative to the connection end, the sensor detects that the signal is amplified in reverse and sent to the ring piezoelectric torsion driver, and the ring piezoelectric torsion driver generates a torsional torque that is opposite to the torsion deformation to suppress its deformation or vibrate. The rod integrates sensing and drive control, and has the advantages of compact structure, good control characteristics, low power consumption, and good vibration suppression effect. It can be widely used in the operating rods and truss structures of space robots, and in the field of active vibration control where torsional vibration needs to be suppressed (isolated).

Description

technical field [0001] The invention relates to a control device for suppressing torsional vibration, which is a piezoelectric intelligent torsional vibration control rod. Background technique [0002] Under the action of complex excitation force, many components tend to produce axial stretching vibration, bending vibration, and even torsional vibration. Because the performance of torsional vibration is not intuitive, it often does not attract people's attention. However, with the increase of the output power of various equipment, the volume of the main components of the equipment increases, and the stiffness drops sharply. Especially in the field of aerospace, in order to reduce the cost of launching, it is required to achieve light weight, low stiffness and flexible design of aerospace structures. The impact of torsional vibration on these components is becoming more and more obvious, and in some cases even serious hazards have been produced. Fo...

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Problems solved by technology

However, most of the drivers mentioned above have the characteristics of complex structure, large volume, specific requirements for installation, and general control characteristics.

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