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- 저자 : Tengfei Yue (검색결과 2 건)
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A Youla-parameterized Gap Control for Next Generation of Optical Storage Systems
Tengfei Yue,Zhizheng Wu,Feng Li,Tao Wang,Lu Wang,Dziki Mbemba 제어·로봇·시스템학회 2021 International Journal of Control, Automation, and Vol.19 No.6
With the development of ultra-high-density optical storage technology, the density of storage media is getting higher and higher, but the increase of the capacity of the optical disk leads to the reduce of the lens-disk interface gap and the tolerance of the focus error dramatically. In the case of extremely small spacing, various external disturbances are highly likely to cause a collision between the optical lens and the disc. In order to avoid the collision between the optical lens and disk, effectively eliminate the deterministic disturbance and suppress the unknown random disturbance, in this paper a multi-objective optimal output feedback controller design approach is proposed within the Q (Youla)-parameterized regulator scheme. The optimal Q parameter in the controller is obtained by solving the properly formulated linear matrix inequalities (LMIs). The experimental results show that the designed Q-parameterized controller can eliminate the influence of various disturbances and suppress the occurrence of collisions effectively.
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Weixiao Tuo,Xingfei Li,Yue Ji,Tengfei Wu,Ziming Xie 한국정밀공학회 2020 International Journal of Precision Engineering and Vol.21 No.5
In this paper, an analytical compliance model for right circle fl exure hinge (RCFH) is presented with the stress concentrationin consideration. The stress concentration caused by changes in RCFH’s cross-section usually happens at the weakestpoint. It has been shown to seriously aff ect RCFH’s compliance calculation. Based on the virtual work theory, superpositionrelationship of the deformation, as well as Castigliano’s second theorem, RCFH’s analytical compliance model consideringthe stress concentration eff ect is established. The model is calculated as a series of closed-form equations which are relatedwith geometric dimensions and employed material. Complicated defi nite integrals existing in these compliance equations areproved to be correctly calculated through comparisons with other literatures. Finally, in order to examine the validity of theestablished model, fi nite element analysis (FEA) is conducted. The relative errors between the theoretical values obtainedby the established model and FEA results are found within 20% for a wide range of geometric dimensions.
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