A novel vibration actuator based on active magnetic spring

Olaru, Radu; Arcire, Alexandru; Petrescu, Camelia; Mihai, Marius Mugurel; Gîrtan, Bogdan

doi:10.1016/j.sna.2017.07.041

Cited by 19 publications

(9 citation statements)

References 13 publications

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“…From Eq. (14), it can be found that the responses at the error sensor location with feedback control loop was expressed as…”

Section: Stability and Control Performancementioning

confidence: 99%

“…The first approach is to develop the new type IAs which have much lower natural frequency. For examples, Olaru et al 14 used a differential magnetic spring to replace the classical elastic suspensions in IAs. Braghin et al 15 introduced a new design method for the supporting structure of the magnetostrictive spring, thus the IA can extend its lower frequency working ranges by reduction of its natural frequency.…”

Section: Introductionmentioning

confidence: 99%

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Inertial Actuator with Virtual Mass for Active Vibration Control

Mao¹,

Li²,

Huang³

2020

The International Journal of Acoustics and Vibration

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Inertial actuators (IAs) are often used as control units in active noise and vibration control systems. It is well-known that the IA's natural frequency should be far below that of the structure under control to ensure good stability margins. However, under normal circumstances, an IA with low natural frequency either increases the additional weight or causes unwanted static displacement of the IA's proof-mass. In this study, an IA with virtual mass is presented to reduce the IA's natural frequency without changing its physical design. The virtual mass of the IA is realized by using the proof-mass acceleration feedback as a local loop within the IA. Thus, the IA's natural frequency can be shifted to low frequency for active control application. The proposed IA with virtual mass is then applied to actively control a clamped beam's vibration based on the velocity feedback control system. The experimental results show that the stability of the control system and the control performance can be improved significantly as the IA's natural frequency is reduced with virtual mass.

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“…From Eq. (14), it can be found that the responses at the error sensor location with feedback control loop was expressed as…”

Section: Stability and Control Performancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Inertial Actuator with Virtual Mass for Active Vibration Control

Mao¹,

Li²,

Huang³

2020

The International Journal of Acoustics and Vibration

View full text Add to dashboard Cite

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“…On the other hand, the bearing object is the exhaust valve, which has a certain motion curve, the load simulator needs to follow the valve passively for linear motion. Therefore, the electric load linear simulator was selected as the load device to implement gas force on the exhaust valve under semi-physical conditions by comparing the advantages and disadvantages of different load simulators, as shown in Table 1 [17][18][19][20]. The schematic diagram of the electric load simulator is shown in Figure 1.…”

Section: System Configurationsmentioning

confidence: 99%

An Electric Load Simulator for Engine Camless Valvetrains

et al. 2019

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Camless valvetrains have become a promising direction to improve the performance of internal combustion engines. In this paper, an electric load simulator is proposed to simulate and implement gas force on the exhaust valve for camless valvetrains under semi-physical conditions. According to test data, the 1D gas-dynamic model was established to get boundary conditions and initial values for 3D finite element simulation. The 3D finite element simulation model was solved to obtain the gas force characteristics of the exhaust valve for camless valvetrains. The electromagnetic actuator was designed according to the system scheme and performance requirements of the electric load simulator. The PID (Proportion Integration Differentiation) algorithm was designed to control the output force of the electric load simulator and reproduce the gas force characteristics of the exhaust valve. It was found that the output force of the electric load simulator could follow the variation of the target gas force and meet the performance requirements of the electric load simulator based on simulation results and experimental results.

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“…A new linear-electromagnetic actuator used for cellular phones was designed using the voltage equation of the equivalent circuit method that treated electromagnetic parameters such as inductance, speedance, and force factor as constant values [9]. A vibration actuator was developed based on active magnetic springs by taking advantage of polynomial fitting to outline the magnetic force characteristics [10], and Lee developed a horizontal linear vibrating actuator and modeled the mechanical domain by a two-degrees-of-freedom system that considered the electromagnetic and mechanical domains separately [11]. However, in both cases, nonlinear parameters such as inductance, speedance, and force factors were not considered.…”

Section: Introductionmentioning

confidence: 99%

Analysis of a Vibrating Motor Considering Electrical, Magnetic, and Mechanical Coupling Effect

2019

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A vibrating motor is a multi-physics product in which there is coupling between electrical, magnetic, and mechanical domains. To obtain a more accurate analysis, nonlinear parameters, such as inductance, speedance, and force factor, are considered as functions of current and displacement based on the finite element method. By solving a voltage equation using a numerical iteration method, current and displacement at each frequency of the vibrating motor can be calculated. The validity of the analysis method was demonstrated by comparing the results of the experiment with those of the simulation and they were found to be similar. validation, J.-H.K.; formal analysis, J.-H.K.; investigation, J.-H.K.; resources, J.-H.K. and Y.-W.J.; data curation, J.-H.K.; writing-original draft preparation, J.-H.K.; writing-review and editing, J.-H.K., Y.-W.J. and S.-M.H.; visualization, J.-H.K.; supervision, S.-M.H.; project administration, S.-M.H. Funding: This research received no external funding. Conflicts of Interest:The authors declare no conflict of interest.

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A novel vibration actuator based on active magnetic spring

Cited by 19 publications

References 13 publications

Inertial Actuator with Virtual Mass for Active Vibration Control

Inertial Actuator with Virtual Mass for Active Vibration Control

An Electric Load Simulator for Engine Camless Valvetrains

Analysis of a Vibrating Motor Considering Electrical, Magnetic, and Mechanical Coupling Effect

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