A Novel Piecewise Frequency Control Strategy Based on Fractional-Order Filter for Coordinating Vibration Isolation and Positioning of Supporting System

Tao, Yeying; Jiang, Wei; Han, Bin; Li, Xiaoqing; Luo, Ying; Zeng, Lizhan

doi:10.3390/s20185307

Cited by 5 publications

(3 citation statements)

References 30 publications

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“…In the field of vibration control, the SHD control can realize a satisfy performance and it is utilized to apply for various equipment. Absolute damping coefficient is the key parameter of this strategy, and the larger the parameter, the better the isolation performance [10][11][12]. But the parameter is limited to the ability of actuator and it is necessary to study novel strategies based on the optimization of SHD control.…”

Section: Introductionmentioning

confidence: 99%

Research on a novel strategy of vibration isolation for time-variant payload

Zhang,

Che,

Gao

et al. 2024

Third International Conference on Electronic Information Engineering and Data Processing (EIEDP 2024)

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Airborne equipment suffers a large overloaded force frequently due to the high dynamic characteristic of the airplane. To improve the performance of vibration isolation for overloaded payloads, an adaptive negative stiffness and sky-hook damping (ANS-SHD) control strategy is proposed based on a hybrid actuating system. The configuration and dynamic model of the system is illustrated and a simulation model of vibration isolation for time-variant payload with immense extents is established to validate the ability of proposed strategy. The simulation results demonstrate that the proposed strategy has a significant superiority compared with the sky-hook damping (SHD) control at 2-50 Hz and the vibration can be attenuated by 92.2% under the random excitation.

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Section: Introductionmentioning

confidence: 99%

Research on a novel strategy of vibration isolation for time-variant payload

Zhang,

Che,

Gao

et al. 2024

Third International Conference on Electronic Information Engineering and Data Processing (EIEDP 2024)

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“…In addition to suppressing the floor vibration, in some cases, the amplitude of direct interference is large. Therefore, it is necessary to suppress the direct interference at the same time for vibration isolators (Tao and Jiang, 2020; Kim et al, 2020). An active negative-stiffness control method based on the connection of positive and negative stiffness in series to generate infinite stiffness is proposed, which was demonstrated to effectively suppress the static direct interference of the load (Shahadat et al, 2015; Hoque et al, 2006; Mizuno et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

An optimal H₂ controller based on vibration energy minimization for a horizontal vibration isolator supported by air bearings

Wang

Lin³

et al. 2022

Journal of Vibration and Control

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To suppress various interferences in the active vibration control process simultaneously, an optimal H2 control method based on vibration energy minimization is proposed in this paper. The interference sources mainly include floor vibration interference, direct interference, and sensor noise as well as electrical noise and quantization noise of the analog to digital and digital to analog converters. The interferences are modeled by weighting filters and the load vibration is weighted by a scaling filter, both of which are introduced into the design of the system’s H2 controller. Thus, the load vibration energy is equivalent to the H2 norm of the system. This method can minimize the total impact of external interferences and improve the vibration isolation performance of the system. Compared with the traditional proportional integral derivative control method, it significantly reduces the root-mean-square value of the load vibration. Simulation and experimental results verify the effectiveness of the proposed control method.

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“…Stiffness control is one of the key unit technologies of a vibration isolation system [ 9 , 10 , 11 , 12 ]. If the positive and negative stiffness mechanisms are combined reasonably, the system characteristics such as zero stiffness and infinite stiffness can be obtained.…”

Section: Introductionmentioning

confidence: 99%

Design and Experimentation of a Self-Sensing Actuator for Active Vibration Isolation System with Adjustable Anti-Resonance Frequency Controller

Liu

et al. 2021

Sensors

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The vibration isolation system is now indispensable to high-precision instruments and equipment, which can provide a low vibration environment to ensure performance. However, the disturbance with variable frequency poses a challenge to the vibration isolation system, resulting in precision reduction of dynamic modeling. This paper presents a velocity self-sensing method and experimental verification of a vibration isolation system. A self-sensing actuator is designed to isolate the vibration with varying frequencies according to the dynamic vibration absorber structure. The mechanical structure of the actuator is illustrated, and the dynamic model is derived. Then a self-sensing method is proposed to adjust the anti-resonance frequency of the system without velocity sensors, which can also reduce the complexity of the system and prevent the disturbance transmitting along the cables. The self-sensing controller is constructed to track the variable frequency of the disturbance. A prototype of the isolation system equipped with velocity sensors is developed for the experiment. The experiment results show that the closed-loop transmissibility is less than −5 dB in the whole frequency rand and is less than −40 dB around, adding anti-resonance frequency which can be adjusted from 0 Hz to initial anti-resonance frequency. The disturbance amplitude of the payload can be suppressed to 10%.

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A Novel Piecewise Frequency Control Strategy Based on Fractional-Order Filter for Coordinating Vibration Isolation and Positioning of Supporting System

Cited by 5 publications

References 30 publications

Research on a novel strategy of vibration isolation for time-variant payload

Research on a novel strategy of vibration isolation for time-variant payload

An optimal H₂ controller based on vibration energy minimization for a horizontal vibration isolator supported by air bearings

Design and Experimentation of a Self-Sensing Actuator for Active Vibration Isolation System with Adjustable Anti-Resonance Frequency Controller

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A Novel Piecewise Frequency Control Strategy Based on Fractional-Order Filter for Coordinating Vibration Isolation and Positioning of Supporting System

Cited by 5 publications

References 30 publications

Research on a novel strategy of vibration isolation for time-variant payload

Research on a novel strategy of vibration isolation for time-variant payload

An optimal H2 controller based on vibration energy minimization for a horizontal vibration isolator supported by air bearings

Design and Experimentation of a Self-Sensing Actuator for Active Vibration Isolation System with Adjustable Anti-Resonance Frequency Controller

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Product

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An optimal H₂ controller based on vibration energy minimization for a horizontal vibration isolator supported by air bearings