Optimum trade-off charts considering mass variation for the design of semi-active and passive shock absorbers for landing gear

Shi, Fengyan; Tanigawa, Naoki; Koganei, Reiko; Maemori, Ken’ichi

doi:10.1299/jamdsm.2016jamdsm0005

Cited by 4 publications

(4 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We deal with the Japanese national line Boeing 747-400 as the model. According to the JAL Practical Dictionary Flight Plan, Aircraft Specifications and Ability Table [11], the maximum design landing weight (MDLW) is 260.4t. The MDLW is the maximum certificated design weight for landing limited by aircraft strength and airworthiness requirements.…”

Section: Aircraft Weightsmentioning

confidence: 99%

“…In Reference [7], the possible optimization strategies for semi-active landing gear at touchdown and during taxiing were discussed. In addition, problems concerning mass variation have been discussed (Kobayashi, et al, 2009 [8]; Kobayashi, et al, 2013 [9]; Maemori, et al, 2003 [3]; Maemori, et al, 2004 [10] and SHI, et al, 2016 [11]) and in References [11], a bypass shock absorber was discussed and tested to deal with the mass variation problem.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Multi-objective Optimization of Passive Shock Absorber for Landing Gear

Shi¹

2019

AJME

Self Cite

View full text Add to dashboard Cite

In order to solve the mass variation problem of aircraft landing gears, usually, semi-active or active shock absorbers are considered first. In this study, however, several types of metering pin constructions are proposed, and have been obtained optimal solutions through multi-objective optimization. The multi-objective optimization methods to find optimum solutions of metering pin dimensions, displacements and the initial pressure of gas are proposed to deal with the mass variation problem. The optimum pareto front sets of four passive shock absorbers are compared and evaluated in this paper. Using the optimum solutions selected from the optimum pareto front sets, we also evaluate and compare the performance of each passive shock absorber with different metering pin construction through simulations. It is evident that the multi-objective optimization solutions of passive shock absorber with new metering pin constructions reduced the mass variation problem to a certain extent. The optimization results and method are helpful in the design of landing gears shock absorbers for various aircrafts.

show abstract

Section: Aircraft Weightsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multi-objective Optimization of Passive Shock Absorber for Landing Gear

Shi¹

2019

AJME

Self Cite

View full text Add to dashboard Cite

show abstract

“…In Reference [6], the possible optimization strategies for semi-active landing gear at touchdown and during taxiing were discussed. In addition, problems concerning mass variation have been discussed [7,8,9,10,11]. In References [11], a bypass shock absorber was discussed and tried to deal with the mass variation problem.…”

Section: Introductionmentioning

confidence: 99%

Single-objective Optimization of Passive Shock Absorber for Landing Gear

Shi¹,

Dean²,

Suyama³

2019

AJME

Self Cite

View full text Add to dashboard Cite

In previous paper, "Multi-objective optimization of Passive Shock Absorber for Landing Gear", several new construction of metering pin in passive shock absorber have been proposed, and obtained optimum solutions of metering pin dimensions by multi-objective optimization. The aim of the previous paper is to solve the mass variation problem. The shock absorbers with the results of multi-objective optimization for the new metering pin constructions can be called a "semi semi-active shock absorber". In this paper, we do single-objective optimization just for simple passive shock absorbers, namely optimization at maximum or minimum masses. The aim of this paper is to evaluate the performance of simple passive shock absorbers with new construction metering pin, not as a semi semi-active shock absorber to deal with the mass variation problem. We proposed single-objective optimization method of passive shock absorber without metering pin, with single and multi-tapered metering pins, and with single and multi-parabolic metering pins. Each of these metering pin constructions have been obtained optimal solutions. Using the optimum solutions, we evaluate and compare the performance of each passive shock absorber without and with different metering pins for maximum or minimum masses. The optimization results and method are helpful in the design of landing gears for various aircrafts, especially, for design of lighter aircraft landing gears, not necessary to be considered mass vibration problem.

show abstract

“…Wu et al 13 used the genetic algorithm (GA) as the optimization technique and chose damping performance to be the optimization object. Shi et al 14 proposed the multi-objective optimization problem considering mass variation and generated optimum trade-off charts for the design of a semi-active shock absorber for landing gear.…”

Section: Introductionmentioning

confidence: 99%

Dynamic analysis and optimal control of the landing process of the offshore installation

Zhu

Zhang

Zhu

et al. 2017

Advances in Mechanical Engineering

View full text Add to dashboard Cite

During the offshore installation process, any disturbance such as heave motion may lead to a significant impact on the equipment, which may damage the equipment permanently. The shock isolator for the installation can provide good performance for the equipment and has the ability to adapt to various ocean conditions. Therefore, an experimental facility of offshore installation is set up, and the dynamic model is presented. The model includes the effect of the tensioning and relaxing of rope and the displacement constraint of shock isolator. Considering the maximal travel range of the isolator finalized as a constant force isolator, the optimum control strategy is conducted to mitigate the peak force transferred to the equipment during the landing process. Finally, the experimental results are compared to the simulation results under typical operating conditions. Then, the effective of this optimum strategy can be verified by comparing the passive control strategy. It can be found that when the optimal control strategy can reduce the peak acceleration of equipment under the harsh sea condition.

show abstract

Optimum trade-off charts considering mass variation for the design of semi-active and passive shock absorbers for landing gear

Cited by 4 publications

References 17 publications

Multi-objective Optimization of Passive Shock Absorber for Landing Gear

Multi-objective Optimization of Passive Shock Absorber for Landing Gear

Single-objective Optimization of Passive Shock Absorber for Landing Gear

Dynamic analysis and optimal control of the landing process of the offshore installation

Contact Info

Product

Resources

About