Study on the dynamic behavior of herringbone gear structure of marine propulsion system powered by double-cylinder turbines

Xu, Jing; Jiao, Chunxiao; Zou, Donglin; Ta, Na; Rao, Zhushi

doi:10.1007/s11431-021-1916-x

Cited by 9 publications

(2 citation statements)

References 30 publications

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“…The second channel usually represents the channel from the activator to the fault sensor. The second channel includes the D/A converter, the amplifier, the activator, the physical channel, and the error-sensing main [12]. After filtering the signal used by the second channel, the distribution of the individual values on the autocorrelation matrix of the input signal increases and is not diagonalized.…”

Section: Cnd Servermentioning

confidence: 99%

Active Vibration Control of Robot Gear System Based on Adaptive Control Algorithm

Zhang

Guan

2022

Journal of Sensors

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With the aim of solving the errors of gear transmission system in the actual manufacturing process, processing and installation, and solving the the vibration and noise of the gear system caused by the deformation brought about by external excitation such as motor load and actuator, which seriously threaten the safety and stability of unit equipment, a novel active vibration suppression structure of multistage gear system with built-in piezoelectric actuator is designed to generate active control force, and it can be used on the shaft. An active controller is designed and established using FxLMS adaptive algorithm. The results of this method show that by measuring the vibration signal system, the base frequency of the high-speed gear pair is 310 Hz, and the basic frequency of the low-speed gear pair is 192 Hz. I had the adaptation snare go for almost 0.5 seconds, with a difference of 0.52%. Adaptive Trap II reached in 1 second, with a difference of 0.96%. In the active vibration suppression test, the basic frequency of the high-speed gear pair is 804 Hz, and the basic frequency of the low-speed gear connector is 500 Hz. Using the FxLMS adaptive algorithm, it is able to effectively suppress the frequency vibrations of the high-speed dual-gear and low-speed dual-gear coupling systems of multispeed gears. After being controlled by FxLMS algorithm at the second frequency of the high-speed gear, the vibration reduction is about 10 dB at the third frequency of the low-speed gear. The vibration reduction is also approximately 7 dB. This has proved that a new experiment of industrial safety can be used to accelerate the movement of gear vibrations using the FxLMS adaptation algorithm.

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Section: Cnd Servermentioning

confidence: 99%

Active Vibration Control of Robot Gear System Based on Adaptive Control Algorithm

Zhang

Guan

2022

Journal of Sensors

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“…Compared with the results by reference [40] (the predicted model used in reference [40] only considers the bending deformation of the shaft caused by a concentrated load of screw), the results predicted in this study are smaller. That means the lubrication cannot be neglected in the natural frequency calculation [41,42].…”

Section: The Natural Frequency Analysismentioning

confidence: 99%

Theoretical Study on the Dynamic Characteristics of Marine Stern Bearing Considering Cavitation and Bending Deformation Effects of the Shaft

Xie

et al. 2022

Lubricants

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When the ship runs, owing to the superposition of the gravity of the shaft and resistance of water, with the increment in rotational speeds, the shaft will produce different degrees of bending deformation, which immensely reduces the power transmission efficiency. Based on the aforementioned problem, the present study focuses on the influences of bending deformation of the shaft with a cavitation effect on the dynamic characteristics of the stern bearing. The mixed lubrication model with bending deformation and cavitation effect is established. At present, the deflection curve equation is employed, the finite perturbation method is applied to calculate the dynamic coefficient, and the cavitation pressure is determined by the numerical method. According to the analysis, the variation laws of equivalent stiffness and natural frequency are exhibited. It is shown that the equivalent stiffness is more affected by the speeds, especially at low speeds; There is a critical speed between 130 rpm and 150 rpm, which makes the natural frequency strike the maximum value. Finally, the research results provide a theoretical basis for the ships to avoid large vibration during navigation.

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Investigation on the stability and anti-eccentric load margin of a novel structure bearing lubricated by low viscosity medium

Xie

Yang

et al. 2022

Sci. China Technol. Sci.

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Study on the dynamic behavior of herringbone gear structure of marine propulsion system powered by double-cylinder turbines

Cited by 9 publications

References 30 publications

Active Vibration Control of Robot Gear System Based on Adaptive Control Algorithm

Active Vibration Control of Robot Gear System Based on Adaptive Control Algorithm

Theoretical Study on the Dynamic Characteristics of Marine Stern Bearing Considering Cavitation and Bending Deformation Effects of the Shaft

Investigation on the stability and anti-eccentric load margin of a novel structure bearing lubricated by low viscosity medium

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