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RISS 인기검색어
- 검색키워드
- 저자 : Farong Kou (검색결과 3 건)
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Xinqian Zhang,Farong Kou,Guohong Wang,Jianan Xu 대한기계학회 2023 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.37 No.1
In this paper, the parameter optimization and error analysis of the rack and pinion steering mechanism are carried out on the basis of considering the influence of kingpin parameters. The steering characteristic equation describing the motion of the steering mechanism is calculated by analyzing the spatial geometrical relationship between the wheel and kingpin and unifying the projection relation between the kingpin and the equivalent steering trapezoid. The ideal Ackermann equation is modified by the Ackermann rate and the kingpin parameters. The modified Ackermann equation is used as the objective function. The segmented fitness function and the evaluation function with weighted factors are designed. A genetic algorithm containing the three functions is used to optimize the parameters of the steering characteristic equation. The error analysis of the numerical example shows that the accuracy of steering trapezoid structure parameters, steering characteristic equation, and Ackermann equation is improved compared with that before optimization.
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Jianan Xu,Farong Kou,Xinqian Zhang,Guohong Wang 대한기계학회 2023 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.37 No.8
A vehicle's solenoid valve-actuated shock (SVSA) absorber is of wide interest because of its adjustable damping characteristics. The proportional solenoid valve is a pivotal component for commanding damping force, but the research on its model principle still needs to be improved. Therefore, this research aimed to establish an accurate model of the proportional solenoid valve composed of the pilot valve and relief valve. In the pilot valve, we proposed a valve spool structure using a two-stage combined throttling groove to control flow accurately. Then, the dynamic equation of the spool was established, and it is also considered that the magnetic saturation of soft magnetic materials impacts electromagnetic force. The flow force in the dynamic equation was numerically solved by the CFD method. The flow rate in the relief valve was analyzed from the deformation of the lamination valves and main valve plate through the small deflections thin plate theory. Then, the SVSA bench test was carried out. The results show good agreement between the test and calculation, and the maximum error is within 9 %. It is indicated that the model of the SVSA equipped with the proportional solenoid valve has high accuracy.
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Loss of strain energy in metal belt for continuously variable transmission (CVT) pulley
Wu Zhang,Wei Guo,Chuanwei Zhang,Farong Kou 대한기계학회 2015 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.29 No.7
Pulley SENE (Strain energy) losses affect the transmission efficiency of metal belt continuously variable transmissions. The presentresearch focuses on analysis of the SENE power loss. Mechanical and deformation models of the pulley have been developed. The pulleystress, strain and SENE analyses were performed using finite element method software. The results indicate that with an increase in thetransmission ratio, the SENE of the driving pulley decreases, while that of the driven pulley increases, and the SENE-induced total powerloss increases after initially decreasing; the minimum and maximum pulley SENE total power losses are 43.92 and 240.69 W respectively. The pulley working radius was also found to have a major impact on the stress, strain and SENE. Our conclusion that the SENEpower loss is at a minimum when the transmission ratio is 1 is consistent with the real behavior of these pulleys.
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