Fuzzy logic control based on genetic algorithm for a multi-source excitations floating raft active vibration isolation system

Song, Chunsheng; Yu, Chuanchao; Xiao, Yao; Zhang, Jinguang

doi:10.1177/1687814017705843

Cited by 10 publications

(8 citation statements)

References 11 publications

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“…Consensus algorithm is pluggable: 3 vendors have realized the pluggable consensus algorithm, and some vendors have improved the consensus algorithm, supporting the real-time switching of the Raft algorithm and the BFT algorithm [21].…”

Section: Permission Query and Historical Data Tracingmentioning

confidence: 99%

An Assessment Framework for Distributed Ledger Technology in Financial Application

Qing

Liu

Zheng

2020

Proceedings of the 2nd ACM International Symposium on Blockchain and Secure Critical Infrastructure

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Distributed Ledger Technology (DLT) currently stands in the limelight. In many people's eyes, DLT has great potential to accelerate the digitalization process and substantially change the roles and services of central banks. On the other hands, as many new applications for DLT spring up, there isn't an assessment framework to evaluate DLT applied in the financial industry, leaving those systems to be easily under attack. This paper presents an initial DLT assessment framework for financial application. Through a suite of benchmarks, we show the evaluation results and explore the factors which affect the performance and security of DLT application.

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Section: Permission Query and Historical Data Tracingmentioning

confidence: 99%

An Assessment Framework for Distributed Ledger Technology in Financial Application

Qing

Liu

Zheng

2020

Proceedings of the 2nd ACM International Symposium on Blockchain and Secure Critical Infrastructure

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“…The control system designed and studied in this paper is mainly based on the existing floating raft active vibration isolation platform of our team. 12,13 The existing system is shown in Fig. 1, the left part is a mechanical device and the right part is an electric control device.…”

Section: Floating Raft Active Vibration Isolation Platform and Mathemmentioning

confidence: 99%

“…[3][4][5][6] Research on floating raft active vibration isolation mainly focuses on control strategy. [7][8][9][10][11] Therefore, relying on the floating raft active vibration isolation system based on an electromagnetic vibration isolator developed by our team, 12,13 this paper strategizes the designs and studies of the control system utilizing the floating raft active vibration isolation system.…”

Section: Introductionmentioning

confidence: 99%

Fuzzy Control of Floating Raft Active Vibration Isolation System under Narrowband Interference

Jiang¹,

Duan²,

Liu³

2020

The International Journal of Acoustics and Vibration

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The harmonic signal generated by power equipment on naval vessels is a typical narrowband interference, which seriously affects the stealth performance of naval vessels. The float raft active vibration isolation system is characterized by strong adaptability and good controllability, which can effectively isolate low-frequency interference. For the active vibration isolation system, the control strategy is one of the core, and the precise mathematical model is difficult to be established. The fuzzy control does not rely on the precise mathematical model of the controlled system, which cannot only provide an intelligent path for the active control of the complex floating raft system, but also effectively suppresses the narrowband interference caused by naval vessels' power equipment. Therefore, depending on the existing float raft active vibration isolation platform, this paper outlines a design for a two-input/single-output optimized fuzzy control system based on vibration acceleration, variation of vibration acceleration and control voltage. In an optimized fuzzy control system, an algorithm of quantum behavior particle swarm optimization algorithm (QPSO) is proposed to optimize quantization factor and scale factor because quantization factor and scale factor are set subjectively with strong subjectivity and blindness, and the stability of the control system is roughly verified. Therefore, simulations and experiments are carried out to test and verify the performance of control system designs outlined in this paper. Through comparative analysis, it shows that the floating raft active vibration isolation system with a fuzzy control system based on the QPSO algorithm has a favorable effect on low-frequency narrowband interference.

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“…Wang and Mak 20 presented the theoretical of the inertial actuator connected to the accelerometer and introduced an active vibration control of the floating raft by the local feedback loop. Song et al 21 established discrete transfer function mathematics of floating raft active vibration isolation system based on system identification method model. Huang et al 22 proposed a system modeling and optimization method for analyzing the typical floating raft system of submarine and studied the optimization problem under different vibro-acoustic targets.…”

Section: Introductionmentioning

confidence: 99%

Vibration control of a marine centrifugal pump using floating raft isolation system

Liu

et al. 2019

Journal of Low Frequency Noise, Vibration and Active Control

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In order to study the influence of floating raft isolation system (FRIS) on the vibration characteristics of marine pump, a marine centrifugal pump with/without FRIS under the same operation condition, which specific speed is 66.7, was experimentally measured. The maximum efficiency of the pump is 75.8%, which is under 1.2 Qd. Results show that the characteristic frequencies in the vibration spectrums of the pump with/without FRIS are APF (axial passing frequency), the BPF (blade passing frequency) and its high-order harmonic frequency. After installing FRIS, under 0.8 Qd, 1.0 Qd and 1.2 Qd, the vibration intensity of the pump at inlet flange is slighter than that at pump base and larger than that at pump bracket. The vibration intensity at outlet flange is slighter than that at the pump bracket and larger than that at pump body, and the vibration intensity at connecting plate is the lowest. The vibration velocity level of pump base decreases with the increase of flow rate, the maximum vibration intensity at M1–M4 is reduced by 88% than that without FRIS, and the maximum vibration velocity of the APF at M1–M4 is reduced by 83.3% than that without FRIS.

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Fuzzy logic control based on genetic algorithm for a multi-source excitations floating raft active vibration isolation system

Cited by 10 publications

References 11 publications

An Assessment Framework for Distributed Ledger Technology in Financial Application

An Assessment Framework for Distributed Ledger Technology in Financial Application

Fuzzy Control of Floating Raft Active Vibration Isolation System under Narrowband Interference

Vibration control of a marine centrifugal pump using floating raft isolation system

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