Piezoelectric and electromagnetic induction double-feed magnetorheological vibration damping device and its control method

Abstract

The invention discloses a piezoelectric and electromagnetic induction dual energy feedback type magneto-rheological vibration damper which comprises a vibration damper body and a vibration damper controller. The vibration damper body comprises a cylinder barrel, a pressure supporting floating piston, a middle isolation floating piston, a piston rod, piezoelectric generation modules, a spring pressing plate, a force transfer spring, a spring clamping seat, a lower permanent magnet, a magnetic coil, an upper permanent magnet, a magnetism isolating plate, a piston, an excitation coil winding, an electromagnetic induction coil fixing rod and an electromagnetic induction coil. A control box is arranged on the outer wall of the cylinder barrel, the vibration damper controller is arranged inside the control box, and a rectifier, a storage battery charging circuit, a first controllable constant current source circuit and a second controllable constant current source circuit are further arranged inside the control box. The invention further discloses a control method of the piezoelectric and electromagnetic induction dual energy feedback type magneto-rheological vibration damper. The piezoelectric and electromagnetic induction dual energy feedback type magneto-rheological vibration damper has the piezoelectric and electromagnetic induction dual energy feedback function, can achieve not only a damping change function but also a rigidity change purpose, and has good vibration damping performance.

Description

technical field [0001] The invention belongs to the technical field of magnetorheological shock absorbers, and in particular relates to a piezoelectric and electromagnetic induction dual-feed magnetorheological shock absorber and a control method thereof. Background technique [0002] Magneto-rheological fluid is an important branch of smart materials. It has special physical effects. Under the action of an external magnetic field, it can undergo a liquid-solid two-phase transition in an instant (milliseconds), that is, from a free-flowing liquid to a semi-solid. Controllable rheological effect, and the change is reversible. In view of this, the magneto-rheological shock absorber made of magnetorheological fluid has the advantages of fast response, large damping force, small energy demand, simple mechanism, good durability, stepless adjustable damping force, and control system In the case of failure, it can still act as a passive damping device and other advantages, so it h...

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Problems solved by technology

S.B Choi proposed a design scheme for the energy-feeding magnetic variable shock absorber by using the rack and pinion mechanism. When the suspension system is excited by the first-order natural frequency, the energy-feeding power reaches 28W, but the energy-feeding efficiency of the intermediate components is increased. It is relatively low, and when working in a relatively harsh environment, it is easy to generate impact, thereby damaging parts and affecting the performance of vibration damping and energy feeding; Wang Daihua et al. use the principle of electromagnetic induction to integrate the energy feeding device In the vibrator, the vibration energy recovery of the magnetorheological shock absorber is realized, but the relative motion range of the induction coil and the excitation coil is small, the magnetic flux changes slowly, and the energy recovery efficiency is very low; Jung uses the magnetic induction energy harvesting device to give the magnetorheological Damper power supply, on the basis of preliminary experiments, achieved the expected control effect, but did not integrate the energy harvesting device and magnetorheological damping as a whole, which took up a lot of space

[0005] The Chinese invention patent with the application number 201310471102.7 discloses a self-supplied electromagnetic rheological damper, which mainly includes a cylinder, a positioning cylinder, a compensation unit, an air-core coil, and a permanent magnet. The compensation unit described above is fixed. When the piston reciprocates, the compensation unit drives the permanent magnet to reciprocate in the inner cavity of the hollow coil to convert mechanical energy into electrical energy. On the one hand, the displacement of the compensation unit is relatively short, and the energy generated is limited, which cannot provide real-time damping. On the other hand, the damping force generated by it is limited and cannot adapt to the working conditions of large damping required. At the same time, the compensation function of the compensation chamber cannot be changed, and of course it cannot achieve the purpose of changing the stiffness in a disguised form.

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