Effect of nonlinear conical springs on the vibration characteristics of seven degree-of-freedom car model using MATLAB/Simscape

Nigwal, Deepak; Pasi, Dinesh Kumar; Chouksey, Manoj

doi:10.1007/s40435-022-01007-2

Cited by 3 publications

(2 citation statements)

References 12 publications

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“…According to the grain characteristic curve, for corn grains, the load change gradually increases regardless of the loading mode in any direction, while the load change slows down and the load change per unit displacement decreases at the end; after that, the critical point is reached, and the grain is broken. The spring was used to control the change in grain load, and the cylindrical spring was a fixed stiffness spring; to meet the load demand, its deformation exceeded the displacement deformation of the end of the seed [18]. According to the corn grain breakage curve, with the use of conical springs for grain load change control, the conical spring in the compression of the late stage shows the occurrence of a small deformation of its spring load change for the curve rising.…”

Section: Grain Damage Regulationmentioning

confidence: 99%

Design and Experiment of Flexible Threshing Device with Variable Stiffness for Corn

Niu,

Zha,

Yang

et al. 2024

Agriculture

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In order to solve the problem of the high damage rate of corn with a high moisture content in the Huanghuaihai region, according to the mechanical characteristics of corn in the Huanghuaihai region, we designed a flexible threshing device with a threshing rasp bar and variable stiffness spring as the buffer carrier, and the elements of the device were nail teeth and a flexible threshing rasp bar, which could be replaced freely. The experiment was based on the threshing rotor speed, threshing gap, and spring stiffness as the influencing factors, with the grain breakage rate and the unthreshed rate as an indicator of three-factor three-level experiments, and in October in Zibo through bench experiments, to determine the best parameter combinations. When the spring compression stiffness was 20.83 N/mm, the rotor speed was 375 r/min, and the gap of the concave plate was 45 mm, the grain breakage rate of the corn ear was 4.7%, and the unthreshed rate was 0.48%, which is in line with the relevant national standards.

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Section: Grain Damage Regulationmentioning

confidence: 99%

Design and Experiment of Flexible Threshing Device with Variable Stiffness for Corn

Niu,

Zha,

Yang

et al. 2024

Agriculture

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“…Pontoon stiffness significantly affects the RMS of the main cabin acceleration. Appropriately increasing the stiffness of the inflatable pontoon is conducive to improving ride comfort [26], and the vertical stiffness of the pontoon can be adjusted in real time in the system, thereby essentially changing the motion characteristics of the main cabin and achieving the goal of reducing the movement of the main cabin.…”

Section: Dynamic Model Of the Rescue Vesselmentioning

confidence: 99%

Research on High-Speed Catamaran Motion Reduction with Semi-Active Control of Flexible Pontoon

Li,

et al. 2023

JMSE

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A high-speed catamaran with a suspension system and flexible pontoons to reduce motion is proposed, and the vertical motion characteristics of the vessel are investigated. The results demonstrate that altering the stiffness of the flexible pontoon can significantly alter the motion characteristics of a high-speed vessel when subjected to wave excitation. The maximum relative error between the theoretical and experimental values of the vertical dynamic characteristics of the flexible pontoon, considered as a gas spring, is 10.5%. The vertical force exerted by the pontoon exhibits nonlinear behavior in response to compression, yet displays approximately linear behavior within its primary operational range. The design of the Linear Quadratic Regulator controller, utilizing genetic algorithm optimization, avoids the issue of subjectively setting weight coefficients typically found in traditional control systems. This approach achieves the objective of determining the optimal feedback matrix within specified constraints. Simulation results illustrate that the LQR controller developed using genetic algorithm significantly enhance the semi-active suspension performance compared to the passive suspension system. The Root Mean Square value of the main cabin acceleration is reduced by 85.82%, simultaneously reducing the RMS value of the suspension dynamic travel by 85.03% and the RMS value of the pontoon dynamic displacement by 24.42%. These outcomes thoroughly substantiate the effective reduction in vertical motion, effectively attenuating the motion of high-speed vessels under wave excitation.

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Study on Static Stiffness of Flexible Inflatable Pontoon of Wave-Adaptive Rescue Vessel

Jiong,

Zheng,

Yong-Kang

et al. 2023

2023 9th International Conference on Fluid Power and Mechatronics (FPM)

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Effect of nonlinear conical springs on the vibration characteristics of seven degree-of-freedom car model using MATLAB/Simscape

Cited by 3 publications

References 12 publications

Design and Experiment of Flexible Threshing Device with Variable Stiffness for Corn

Design and Experiment of Flexible Threshing Device with Variable Stiffness for Corn

Research on High-Speed Catamaran Motion Reduction with Semi-Active Control of Flexible Pontoon

Study on Static Stiffness of Flexible Inflatable Pontoon of Wave-Adaptive Rescue Vessel

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