Synchronous Hydromechanical Drive of a Mobile Machine

Rybak, Alexander; Temirkanov, A. R.; Lyakhnitskaya, O. V.

doi:10.3103/s1068798x18030206

Cited by 30 publications

(11 citation statements)

References 1 publication

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“…The applicability of the given dependences for practical noise calculations at the design stage is quite limited. First of all, it should be noted that expression (3) describes the motion of a system with a concentrated mass, which makes it possible to determine the vibrational velocities of the mechanism at the natural vibration frequency, that is, it is applicable to the tonal spectrum of vibrations and noise [2,4,6,8].…”

Section: Resultsmentioning

confidence: 99%

Theoretical studies on the calculation of the noise of impact equipment in blacksmith shops

et al. 2020

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Most types of forging equipment relate to impact machines, during the operation of which impulse noise occurs, the levels of which at workplaces, in most cases, exceed the maximum permissible values and relate to those factors, the significance of which in some cases is greater than dustiness, high temperature, manipulation of heated workpieces. Therefore, the problem of reducing vibration and noise in the forge shops is extremely relevant and has great scientific and socio-economic significance. To solve the problem of noise reduction in forge shops, various options for reducing the noise activity of equipment have been developed/ It is possible to most effectively reduce noise by changing the material and shapes of the beds, noise-attenuating casings, oil baths for gears.

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Section: Resultsmentioning

confidence: 99%

Theoretical studies on the calculation of the noise of impact equipment in blacksmith shops

et al. 2020

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“…Beds and gears are recommended to be cast from cast iron with spheroidal graphite, since their noise is less than that of welded beds and gears with equal mass. Replacing spur gears with helical gears or chevron gears reduces drive noise when idling by 8 dBA [2,4,6].…”

Section: Methodsmentioning

confidence: 99%

Soundproofing presses by placing its nodes in a soundproof casing, including drive components

2020

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Noise is one of the most unfavorable environmental factors in production facilities, for which it is most difficult to achieve compliance with sanitary standards. Prolonged exposure to intense vibrations and noise leads to noise and vibration diseases. The effect of noise on the human body is not limited to exposure to the organ of hearing. Irritation by noise is transmitted to the central and autonomic nervous systems, through them acts on the internal organs, leading to significant changes in the functional state of the organism. With pulsed and irregular noise, the degree of impact of noise on the body of workers increases. Most types of forging equipment relate to impact machines, during the operation of which impulse noise occurs, the levels of which at workplaces, in most cases, exceed the maximum permissible values and relate to those factors, the significance of which in some cases is greater than dustiness, high temperature, manipulation of heated workpieces. Therefore, the problem of reducing vibration and noise in the forge shops is extremely relevant and has great scientific and socio-economic significance. To solve the problem of noise reduction in forge shops, various options for reducing the noise activity of equipment have been developed/ It is possible to most effectively reduce noise by changing the material and shapes of the beds, noise-attenuating casings, oil baths for gears.

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“…As a consequence, it is becoming a crucial component of robotic excavators [3], shield tunneling machines [4], and hydraulic elevators [5]. Parallel mechanisms can perform more complex operations in restrained space and implement more powerful output forces/torques [6]. In particular, hydraulic parallel mechanisms play an essential role in heavy machinery [7].…”

Section: Introductionmentioning

confidence: 99%

Active Disturbance Rejection Position Synchronous Control of Dual-Hydraulic Actuators with Unknown Dead-Zones

Wang

Zhao

Liu

et al. 2020

Sensors

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In this paper, an integrated control strategy of position synchronization control for dual-electro-hydraulic actuators with unknown dead-zones is proposed. The unified control scheme consists of two parts: One is adaptive dead-zone inverse controllers of each hydraulic actuator to offset the unknown dead-zones. The other is the linear active disturbance rejection controller (LADRC) for position synchronization error. First, the model of the electro-hydraulic proportional position control system (EPPS) was identified by the forgetting factor recursive least square (FFRLS) algorithm. Next, the model reference dead-zone inverse adaptive controller (MRDIAC) was developed to compensate for the delay of actuator response caused by unknown proportional valve dead-zones. Meanwhile, the validity of the adaptive law was proven by the Lyapunov theory. Therefore, the position control accuracy of each hydraulic actuator is guaranteed. Besides, to improve the precision of position synchronization control of dual-hydraulic actuators, a simple and elegant synchronous error-based LADRC was adopted, which applies the total disturbances design concept to eliminate and compensate for motion coupling rather than cross-coupling technology. The performance of the proposed control solution was investigated through extensive comparative experiments based on a hydraulic test platform. The experimental results successfully demonstrate the effectiveness and practicality of the proposed method.

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Synchronous Hydromechanical Drive of a Mobile Machine

Cited by 30 publications

References 1 publication

Theoretical studies on the calculation of the noise of impact equipment in blacksmith shops

Theoretical studies on the calculation of the noise of impact equipment in blacksmith shops

Soundproofing presses by placing its nodes in a soundproof casing, including drive components

Active Disturbance Rejection Position Synchronous Control of Dual-Hydraulic Actuators with Unknown Dead-Zones

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