Principle Study of a Semi-active Inerter Featuring Magnetorheological Effect

Zhong, Weimin; Bai, Xian–Xu; Tang, Chao; Zhu, Anding

doi:10.3389/fmats.2019.00017

Cited by 11 publications

(4 citation statements)

References 16 publications

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“…As seen from Figure 3, this study employs two semi-active controllable damping actuators as an example and one mechanical compensation mechanism. 28 One of the actuators provides the damping force in the first and third quadrants, and the other combining with the mechanical compensation mechanism is for the second and fourth quadrants. As reasonable, it is inferred that pseudo-active actuators are also possibly realized via any combination of positive controllable stiffness/damping/inertance and mechanical compensation mechanism.…”

Section: Concept and Principlementioning

confidence: 99%

“…But whatever the form of the root is, there must be a real root greater than zero. So k l is taken as the largest real root of Equation (28). According to Equations ( 26) and ( 28…”

Section: Conditions For System Stabilitymentioning

confidence: 99%

“…One is for the first and third quadrants and the other one is for the second and fourth. As seen from Figure 3, this study employs two semi‐active controllable damping actuators as an example and one mechanical compensation mechanism 28 . One of the actuators provides the damping force in the first and third quadrants, and the other combining with the mechanical compensation mechanism is for the second and fourth quadrants.…”

Section: Concept and Principlementioning

confidence: 99%

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Pseudo‐active actuators: A concept analysis

Bai

2021

Int Journal of Mech Sys Dyn

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The superior performance of active vibration control systems largely depends on the four-quadrant controllable execution capability in the available force-velocity diagram of active actuators. Although semi-active vibration control systems have the advantages of low energy consumption, simple structure, and high reliability, the system performance is not comparable to active control systems, due to the partial capability in only the first and third quadrants. On the basis of the comprehensive advantages of active and semi-active actuators, to reform the design philosophy of semi-active actuators to realize pseudo-active actuators that have both mechanical properties of active actuators and energy consumption advantages of semi-active actuators, that is, new semi-active actuators with four-quadrant controllable execution capability, will very likely cause a revolution in the related fields of mechanical design and system control. The basic design principle of pseudo-active actuators that use semi-active controllable actuators to achieve active actuator performance in the way of conceptual analysis is proposed. The proposed pseudoactive actuators should consist of two half-four-quadrant actuators, that is, one is for the first and third quadrants and the other one for the second and fourth quadrants.This study employs two semi-active controllable damping actuators and one mechanical compensation mechanism. One of the actuators provides the damping force in the first and third quadrants, and the other one combining with the mechanical compensation mechanism is for the second and fourth quadrants. A global mathematical model of the proposed actuator is established to describe the four different operational modes of the proposed actuator. It is proved that the two operational modes of the proposed actuator can realize active vibration control, and a case study of realizing active control is presented. The other two operational modes are compared with the conventional two-degree-of-freedom model. More specifically, the application cases of the pseudo-active operational mode of the proposed actuator in the quarter-car/body-powertrain suspension system are given, a pseudo-active suspension named dual-hook automobile suspension is presented. Furthermore, an equivalent expression of the electrical network is given for the mechanical network under different operational modes of the proposed actuator.

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Section: Concept and Principlementioning

confidence: 99%

“…But whatever the form of the root is, there must be a real root greater than zero. So k l is taken as the largest real root of Equation (28). According to Equations ( 26) and ( 28…”

Section: Conditions For System Stabilitymentioning

confidence: 99%

Section: Concept and Principlementioning

confidence: 99%

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Pseudo‐active actuators: A concept analysis

Bai

2021

Int Journal of Mech Sys Dyn

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“…Hu et al [6] proposed a semiactive inerter with removable mass. Zhong et al [7] proposed a novel semi-active inerter with MR technology to enhance the performance of passive ball screw type inerter. In their study, a shear mode MR brake is used to tune the inertance.…”

Section: Introductionmentioning

confidence: 99%

Design and testing of a semi-active inerter with magneto-rheological fluid valve

Yu¹,

Dong²,

Shen³

et al. 2021

Smart Mater. Struct.

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This paper presents a novel semi-active inerter with magneto-rheological fluid valve (SAI-MRFV) for improving semi-active system performances in low-frequency domain. The proposed device is composed of a driver element and two driven elements. Driven element 1 contains a hydraulic motor and a plate. Driven element 2 contains a cylinder, two piston rods, two floating pistons and a MR valve. The two driven elements are connected in parallel. The area between the floating pistons is filled with MR fluid, while other areas of SAI-MRFV are filled with hydraulic oil. With the motion of driver piston, the hydraulic oil will be circulated in driver element and driven elements. The flow rate distribution of hydraulic oil in two driven elements can be changed by controlling the pressure drop of driven element 2. Along with the changing of the hydraulic oil flow rate in hydraulic motor, the inertance and damping can be tuned simultaneously. A novel compact annular-radial-orifice flow MR valve is proposed to provide controllable pressure drop in driven element 2. Besides, a theoretical model was established to describe the characteristics of variable inertance and damping force. Based on the conceptual design and theoretical analysis, a prototype was designed, fabricated and tested. The characteristics of single inerter, single MR valve and SAI-MRFV were obtained by a series of experimental tests. The experimental results show that the inertance and damping can be controlled by the changing current of MR valve.

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Improving quasi-zero-stiffness isolator performance: two hybrid isolators employing inerter elements

Yuan,

Jin,

et al. 2024

Applied Mathematical Modelling

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Principle Study of a Semi-active Inerter Featuring Magnetorheological Effect

Cited by 11 publications

References 16 publications

Pseudo‐active actuators: A concept analysis

Pseudo‐active actuators: A concept analysis

Design and testing of a semi-active inerter with magneto-rheological fluid valve

Improving quasi-zero-stiffness isolator performance: two hybrid isolators employing inerter elements

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