A method for determining the horizontal impact load based on the rotational speed of the aircraft's wheel in a landing gear drop test

Wang, Huaitao; Wu, Dafang; Wang, Feng; Ren, Haoyuan

doi:10.1080/13588265.2017.1368121

Cited by 9 publications

(6 citation statements)

References 9 publications

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“…When the vehicle body speed is extremely low, the wheel speed signal can be distorted because of the sensor precision [30]. So, in this period (the critical vehicle body speed is

V_{e} = V_{e 1}

V_{e 1}

is the speed at point a in Figure 9) the target wheel speed is a fixed value, as a threshold.…”

Section: Control Strategy Of Tcsmentioning

confidence: 99%

Practical active traction control for independent‐wheel‐drive electric vehicle based on slip‐ratio threshold determination

Wang

Gao

et al. 2023

Asian Journal of Control

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The traditional traction control system (TCS) based on hydraulic braking only works when the wheels are slipping, which will cause the problem of slow response to extreme slip. In addition, the TCS of four‐wheel‐independent‐drive electric vehicle (4WIDEV) is often based on road adhesion characteristics identification or optimal slip ratio identification to implement active control, which is difficult to achieve in engineering. Aiming at this problem, a practical active TCS is proposed in this paper. Firstly, according to the wheel slip state of the front and rear axles, the dynamic transfer of torque between axles is realized to maintain the vehicle propulsion power. Second, the adhesion conditions between road and tire are classified, and two sets of target slip ratio thresholds are formulated for high and low adhesion pavement, respectively. Then the current road adhesion coefficient is estimated by using the advantage that the in‐wheel motor torque can be obtained in real‐time. Thirdly, the overall framework of the control strategy is established, the logic threshold control algorithm is adopted for tracking the wheel target slip ratio. Finally, the simulation results show that the proposed active TCS can improve the vehicle power and avoid excessive wheel slipping.

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“…When the vehicle body speed is extremely low, the wheel speed signal can be distorted because of the sensor precision [30]. So, in this period (the critical vehicle body speed is

V_{e} = V_{e 1}

V_{e 1}

is the speed at point a in Figure 9) the target wheel speed is a fixed value, as a threshold.…”

Section: Control Strategy Of Tcsmentioning

confidence: 99%

Practical active traction control for independent‐wheel‐drive electric vehicle based on slip‐ratio threshold determination

Wang

Gao

et al. 2023

Asian Journal of Control

View full text Add to dashboard Cite

show abstract

“…However, the actual gears and shafts are not rigid, so the dynamics modeling of the twostage variable speed gear requires a combination of the elastic mechanics and torque balance equation and takes into account the torque loss due to gear mesh and drive shaft torsion during the torque transfer. Figure 2 shows the dynamics model of the two-stage variable speed gear after combining elastic mechanics [9] and torque balance, and its mathematical equation is:…”

Section: Figure 2: the Dynamics Model Of A Two-stage Variable Speed G...mentioning

confidence: 99%

Gear Drive System: Dynamics Analysis Under Impact Load

2022

IJOMAM

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As a machine drive structure, a gear drive system can be subjected to impact loads, affecting regular operation. The dynamics analysis of the gear drive system subjected to impact loads can help to improve the safety of the gear drive structure. This paper briefly introduced the basic structure of the two-stage acceleration gear transmission system and the corresponding dynamics model and solved the equation of the dynamics model with the numerical iteration method of computers to realize the simulation calculation of the gear drive system. Simulation experiments were conducted on the two-stage acceleration gear in MATLAB software to test the shaft torque and shaft torsion angle under the two impact loads, a sudden increase in load, and a sudden increase in power source speed. The results showed that when the load suddenly increased, the shaft torque and shaft torsion angle of the gear shaft increased suddenly, and the oscillations attenuated until they stabilized; the stabilized shaft torque conformed to the drive torque of the load torque on different shafts, and torsion angle of the power shaft was the largest, followed by the load shaft and drive shaft; when the speed of the power source increased suddenly, the shaft torque and torsion angle of the gear shaft also increased suddenly, then decreased with oscillation attenuation, and eventually stabilized at the original values.

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“…Combine harvester manufacturers had conducted numerous field experiments, including load tests on traveling half shafts during operation, providing a theoretical basis for improving their design. Wang et al 11 experimentally obtained the temporally varying data of the instantaneous rotational speed for an aircraft wheel at the instant of its contact with the test platform, using a noncontact photoelectric testing method. Moreover, the kinetic relationship between the transient rotational speed of the aircraft’s wheel and the horizontal impact force was established.…”

Section: Introductionmentioning

confidence: 99%

Dynamic load distribution property of transmission system during rice harvesting process

Wang,

Li,

Wang

et al. 2024

Advances in Mechanical Engineering

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The average time between failures of Chinese combine harvester was far below the advanced combine harvester in Europe and America. A load test system was designed and built on the transmission structure of combine harvester. The dynamic load of the transmission structure was tested on rice harvesting in the field and used to compare with calculated values of maximum load capacity. The damage mechanism and load distribution of transmission structure would be obtained. The test results showed that the average and peak power consumptions of each working part increased with the increase in the speed of the combine harvester. As the stubble height increased, the average and peak power consumptions of each component correspondingly increased with the increase in the load on the entire machine. The power consumptions of the left and right half shafts of the chassis gradually increased, whereas the power consumptions of the other components did not change significantly. The power consumption of the intermediate shaft ranged from 29.53 to 35.92 kW, and the average power consumption was 34.03 kW when harvesting was done at full load in the field. The limit power consumptions of the left and right half axles of the chassis were 9.35 and 11.55 kW.

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A method for determining the horizontal impact load based on the rotational speed of the aircraft's wheel in a landing gear drop test

Cited by 9 publications

References 9 publications

Practical active traction control for independent‐wheel‐drive electric vehicle based on slip‐ratio threshold determination

Practical active traction control for independent‐wheel‐drive electric vehicle based on slip‐ratio threshold determination

Gear Drive System: Dynamics Analysis Under Impact Load

Dynamic load distribution property of transmission system during rice harvesting process

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