Mechanical frequency-shift type power shock absorber and control method

A dynamic vibration absorber, frequency-based technology, applied in mechanical equipment, vibration suppression adjustment, spring/shock absorber, etc., can solve the problems of dynamic vibration absorber vibration reduction characteristics are not significantly affected, the control method is complex, multi-energy, etc., to achieve Ease of designing control laws, high system reliability, and low energy consumption

Inactive Publication Date: 2007-06-13
UNIV OF SCI & TECH OF CHINA
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  • Abstract
  • Description
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Problems solved by technology

But this control method is more complicated, because it not only needs to drive the linear motor, which consumes more energy, but also according to the princi

Method used

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  • Mechanical frequency-shift type power shock absorber and control method
  • Mechanical frequency-shift type power shock absorber and control method
  • Mechanical frequency-shift type power shock absorber and control method

Examples

Experimental program
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Embodiment Construction

[0030] Referring to Fig. 1, the screw 1 and the nut 2 constitute a screw nut movement pair. An angular velocity sensor (code disc) 6 for measuring the rotation angle of the screw is installed at the lower end of the screw 1, the lower end of the screw is fixedly connected with the rotating shaft of the motor 7, and the motor base 8 is fixedly mounted on the object to be damped. The concentrated mass 5 is connected to the nut 2 and the motor base 8 respectively through two elastic rods 3 and 4, one end of the elastic rod 3 is hinged on the outer edge of the nut 2 by a pin shaft, and one end of the elastic rod 4 is hinged by a pin shaft On the motor frame 8. The other ends of the two elastic rods 3 and 4 are respectively hinged on the central axis of the lumped mass 5, and the two elastic rods 3, 4 and the screw rod 1 form an isosceles triangle with a variable base length. When the motor 7 rotates, it drives the screw 1 to rotate, and due to the engagement of the screw nut, the...

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Abstract

The invention relates to damping device and control method. The vibration absorber includes mechanical device and control system. The former includes one kinematic pair formed by nut and screw connected with the electric motor principal axis of which base hinged with one elastic rod. Nut out edge is hinged with another elastic rod. Another ends of the two elastic rods are respectively hinged with the wrist to form isosceles triangle. Angular transducer and acceleration transducer are connected with the control system signal acquisition input port. The control method includes the following steps: inputting vibrating signal into control system; analyzing main vibrating frequency and calculating span value; transforming the span value into rotating signal to make the electric engine drive the nut to rotate; changing the span value for the two elastic rods until to the calculated value. The invention can track the vibration frequency of the object by adjusting vibration absorber natural frequency to reach the optimal damping effect.

Description

Technical field: [0001] The invention relates to a vibration damping device and a control method, in particular to a dynamic vibration absorber and a control method for frequency shifting using mechanical principles. Background technique: [0002] The traditional dynamic vibration absorber is a main actuator for passive vibration control, which has the characteristics of simple structure, convenient installation and remarkable effect of suppressing single-frequency vibration. However, this kind of dynamic vibration absorber usually has a narrow and non-adjustable control frequency band, so a vibration absorber can usually only reduce the vibration of a steady-state vibration with a fixed excitation frequency. When the excitation frequency of the vibration-damped object deviates from its control frequency band, the vibration-damping effect will deteriorate sharply, or even become worse. If the method of increasing the bandwidth is used to solve it, it will definitely make it...

Claims

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Application Information

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IPC IPC(8): F16F15/067
Inventor 李剑锋张先舟龚兴龙张培强
Owner UNIV OF SCI & TECH OF CHINA
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