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RISS 인기검색어
- 검색키워드
- 저자 : Zhengchao Xie (검색결과 3 건)
- 무료
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- 유료
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Modeling and analysis of rotating plates by using self-sensing active constrained layer damping
Zhengchao Xie,Pak Kin Wong,Ian Ian Chong 대한기계학회 2012 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.26 No.10
This paper proposes a new finite element model for active constrained layer damped (CLD) rotating plate with self-sensing technique. Constrained layer damping can effectively reduce the vibration in rotating structures. Unfortunately, most existing research models the rotating structures as beams that are not the case many times. It is meaningful to model the rotating part as plates because of improvements on both the accuracy and the versatility. At the same time, existing research shows that the active constrained layer damping provides a more effective vibration control approach than the passive constrained layer damping. Thus, in this work, a single layer finite element is adopted to model a three-layer active constrained layer damped rotating plate. Unlike previous ones, this finite element model treats all three layers as having the both shear and extension strains, so all types of damping are taken into account. Also, the constraining layer is made of piezoelectric material to work as both the self-sensing sensor and actuator. Then, a proportional control strategy is implemented to effectively control the displacement of the tip end of the rotating plate. Additionally, a parametric study is conducted to explore the impact of some design parameters on structure’s modal characteristics.
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Analysis of automotive rolling lobe air spring under alternative factors with finite element model
Pak Kin Wong,Zhengchao Xie,Jing Zhao,Tao Xu,Feng He 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.12
Air springs are widely used in automotive suspensions for their superior performance in terms of low friction motion, adjustable loadcarrying capacity and user-friendly ride height control. However, it has posed great difficulties in constructing an accurate model as wellas the analysis of the influence of alternative factors, such as cord angle, cord diameter and initial pressure. In this paper, a numericalmodel of the rolling lobe air spring (RLAS) is built by using finite element method and compared with an existing analytical model. Anexperiment with respect to the vertical stiffness of the RLAS is carried out to validate the accuracy of the proposed model. Evaluationresult reveals that the existing analytical model cannot represent the performance of the RLAS very well, whereas the accuracy of thenumerical model is very good. With the verified numerical model, the impacts of many alternative factors on the characteristics of theRLAS are analyzed. Numerical results show that the newly proposed model is reliable to determine the vertical characteristic and physicaldimensions of the RLAS under the alternative factors.
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Jing Zhao,Pak Kin Wong,Zhengchao Xie,Xinbo Ma,Xingqi Hua 한국자동차공학회 2019 International journal of automotive technology Vol.20 No.1
The semi-active suspension (SAS) system has been one of the most attractive topics due to its simplicity and effectiveness in the control of vehicle dynamics. This research proposes a cuckoo search optimized proportional-integral– derivative (CS-PID) strategy for the damping force control of the semi-acive suspension system in order to improve vehicle ride quality. Firstly, a quarter-car suspension model with air spring and variable hydraulic damper (VHD) is developed. By constructing the detailed analytical model and describing the working process, the regulating mechanism and external characteristics of the VHD are presented. Subsequently, the CS-PID strategy is designed to generate the desired damping force according to the vehicle states in real-time, followed with the evaluation of the proposed strategy. Finally, the experimental tests are carried out to verify the accuracy of the VHD model and examine the feasibility of the proposed strategy. The numerical simulation reveal that the proposed control strategy is effective in improving the vehicle performance and the experimental results show that the CS-PID strategy can be successfully implemented in the suspension system for practical use.
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