Theoretical and Experimental Analysis of a Vibration Isolation System Using Hybrid Magnet

Easu, D.; Siddharthan, A.

doi:10.1016/j.proeng.2013.09.192

Cited by 7 publications

(3 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, hybrid-magnet NSVIDs were designed by combining permanent magnets with electromagnets. Compared with passive controlled permanent-magnet system, the hybrid-magnet systems are more stable and can realize controllable properties (Easu and Siddharthan, 2013; Mizuno et al, 2003; Zhou and Liu, 2010).…”

Section: Classification Of Nsvidsmentioning

confidence: 99%

Negative stiffness devices for vibration isolation applications: A review

2020

Advances in Structural Engineering

131

View full text Add to dashboard Cite

In recent years, negative stiffness vibration isolation device with nonlinear characteristic has become an emerging research area and attracted a significant amount of attentions in the community due to the promising potentials it brought into the field. Its high-static-low-dynamic stiffness property endows the capacity to realize effective vibration isolation and in the meantime to maintain the system stability. This article presents a comprehensive review of the recent research and developments on negative stiffness vibration isolation device. It begins with an introduction on the concept of negative stiffness and then provides a summary and discussion regarding the realization and characteristics of negative stiffness vibration isolation device. The article places its special interest on the principles, structure design, and device characterisation of different types of negative stiffness vibration isolation devices, including spring type, pre-bucked beam type, magnetism type, geometrically nonlinear structural type, and composite structural type. Besides, the applications of negative stiffness vibration isolation device, as well as negative stiffness damper, are summarized and discussed based on the current state-of-the-art. Finally, the conclusions and further discussion provide highlights of the investigation.

show abstract

Section: Classification Of Nsvidsmentioning

confidence: 99%

Negative stiffness devices for vibration isolation applications: A review

2020

Advances in Structural Engineering

131

View full text Add to dashboard Cite

show abstract

“…The structure is as follows: in Section 2, a three-dimensional model of semiactive vibration isolation system and its components are shown. In Section 3, the equivalent magnetic circuit method is used to calculate the electromagnetic repulsion force [24] of electromagnetic spring. Then the mathematical model of semi-active vibration isolation system is built and linearized at the equilibrium point.…”

Section: Introductionmentioning

confidence: 99%

Research on semi-active vibration isolation system based on electromagnetic spring

Yang

et al. 2020

Mechanics & Industry

View full text Add to dashboard Cite

This paper proposes a semi-active variable stiffness vibration isolation system based on electromagnetic spring for the low-frequency vibration isolation of mass-varying objects. It is achieved by four straight leaf springs in parallel to an electromagnetic spring system composed of a single electromagnet and a permanent magnet. The equivalent magnetic circuit method is used to compute electromagnetic force of the electromagnetic spring system, and mathematical model of the semi-active vibration isolation system is established according to Maxwell's equations. The nonlinear mathematical model is linearized at the equilibrium point by using the Taylor series expansion theorem to establish linear state-space representation of the system, and then using the traditional PID control method, a double closed-loop feedback control system of the inner current loop and outer location loop is designed. By controlling the current in the coil, the equivalent stiffness and electromagnetic force of the system are variable to achieve semi-active control. Furthermore, the control block diagram of the semi-active vibration isolation system is built based on Simulink software, then make a simulation analysis to the vibration isolation performance of the system and compare the effects of vibration isolation with inner current loop control and without inner current loop control, respectively. Finally, the experiments prove the correctness of the theory. It concludes that this semi-active vibration isolation system is a vibration isolation system with broad application prospects, which has fast current response, high vibration isolation efficiency, and an excellent vibration isolation effect for the low-frequency disturbance of mass-varying objects.

show abstract

“…8,9 Moreover, they are not capable with low energy consumption requirements. 4,10 At this point, vibration isolation systems based on hybrid electromagnets have become a good alternative, 11–16 because in hybrid electromagnet structure, permanent magnets behave as if they were additional current-source equivalents. Yet, electromagnet and permanent magnet both are highly nonlinear in nature, 17 which means that the whole system may show undesired performance under varying disturbances.…”

Section: Introductionmentioning

confidence: 99%

Observer-based H₂ controller design for a vibration isolation stage having hybrid electromagnets

Yalçin

Sever

Erkan

2018

Journal of Low Frequency Noise, Vibration and Active Control

View full text Add to dashboard Cite

Vibration isolation systems based on hybrid electromagnets, consisting of electromagnet and permanent magnet, have a potential usage in many industrial areas, such as clean room design, transportation, semiconductor manufacturing, suspension systems, and robotic surgery due to providing mechanical contact free vibration isolation. Using permanent magnets in the electromagnet structure has some crucial advantages, such as a minimized volume and a more compact structure. Furthermore, the essential force for levitation of vibration isolation stage can be generated by only the permanent magnet(s), which means, by using hybrid electromagnets, magnetic levitation can be achieved with considerably low energy consumption against possible vibrations. This property is called zero-power behavior. However, the main problems of magnetic levitation process are as follows: it has highly nonlinear nature even if it can be linearized; it has unstable pole(s), which makes the system vulnerable in terms of stability. In recent years, linear matrix inequality-based design of controllers has received considerable attention and become very popular due to their ability to satisfy multiobjective design requirements. However, an observer-based H2 controller design for a vibration isolation system having hybrid electromagnets has not been considered yet. Therefore, the linear matrix inequality-based controller is employed to minimize the effect of disturbances on the following objectives, such as vibration isolation, zero-power property, and protection of the levitation gap. The effectiveness of the proposed method is shown with the numerical simulation studies and compared with classical Linear Quadratic Regulator (LQR) approach.

show abstract

Theoretical and Experimental Analysis of a Vibration Isolation System Using Hybrid Magnet

Cited by 7 publications

References 5 publications

Negative stiffness devices for vibration isolation applications: A review

Negative stiffness devices for vibration isolation applications: A review

Research on semi-active vibration isolation system based on electromagnetic spring

Observer-based H₂ controller design for a vibration isolation stage having hybrid electromagnets

Contact Info

Product

Resources

About

Theoretical and Experimental Analysis of a Vibration Isolation System Using Hybrid Magnet

Cited by 7 publications

References 5 publications

Negative stiffness devices for vibration isolation applications: A review

Negative stiffness devices for vibration isolation applications: A review

Research on semi-active vibration isolation system based on electromagnetic spring

Observer-based H2 controller design for a vibration isolation stage having hybrid electromagnets

Contact Info

Product

Resources

About

Observer-based H₂ controller design for a vibration isolation stage having hybrid electromagnets