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| 1 | A Stiffness Adjustment Mechanism Based on Negative Work for High-efficient Propulsion of Robotic Fish显示文摘 | Dong Xu Haining Zeng Xiang Peng Ziqing Zhao Jingmeng Liu | 2018 | Journal of Bionic Engineering2018，15，2： | 3 |
| 2 | Accuracy enhancement of the spherical actuator with a two-level geometric calibration method显示文摘This paper presents a two-level geometric calibration method for the permanent magnet(PM) spherical actuator to improve its motion control accuracy. The proposed actuator is composed of a stator with circumferential coils and a rotor with multiple PM poles. Due to the assembly and fabrication errors, the real geometric parameters of the actuator will deviate from their design values. Hence, the identification of such errors is critical for the motion control tasks. A two-level geometric calibration approach is proposed to identify such errors. In the first level, the calibration model is formulated based on the differential form of the kinematic equation, which is to identify the geometric errors in the spherical joint. In the second level, the calibration model is formulated based on the differential form of torque formula, which is to calibrate the geometric parameters of the magnetization axes of PM poles and coils axes. To demonstrate the robustness and availability of the calibration algorithm, simulations are conducted. The results have shown that the proposed two-level calibration method can effectively compensate the geometric parameter errors and improve the positioning accuracy of the spherical actuator. | Zhang Liang Chen Weihai Liu Jingmeng Wu Xingming Chen I-Ming | 2014 | Chinese Journal of Aeronautics2014，27，2： | 1 |
| 3 | Very-low speed control of PMSM based on EKF estimation with closed loop optimized parameters显示文摘 | Dong Xu Shaoguang Zhang Jingmeng Liu | 2013 | ISA Transactions2013，，： | 1 |
| 4 | Missile guidance law based on extended state observer显示文摘 | Zheng Zhu Dong Xu Liu Jingmeng | 2013 | IEEE Transactions on Industrial Electronics2013，60，12： | 1 |
| 5 | A novel flexure-based uniaxial force sensor with large range and high resolution显示文摘High performance force sensors often encounter the conflicting requirements of high resolution and large measurement range.To address this problem,this paper presents a conceptual design of a novel uniaxial force sensor with large range and dual-stage force resolutions which enables us to measure forces within a wide range with satisfied resolutions.The newly developed force sensor features an aluminum alloy body with a probe to transfer external forces into the sensing element.It employs an optical linear encoder to detect the displacement of the sensing body.This sensing scheme may immunize outside electromagnetic noises and therefore enhance the performance of the sensor thanks to its digital signal output.In this paper,an accurate,analytical model for calculating the static stiffness and dynamics of the system was developed by using pseudo-rigid-body-model(PRBM)methodology.To optimize the design,finite element simulations were conducted.After a prototype sensor was fabricated,preliminary characterization tests were carried out to verify the accuracy of the theoretical model and demonstrate the effectiveness of the design.The experiment results indicate that the structure of the new sensor is compact,and it has the ability to measure both micro range and macro range forces within one setup,meanwhile keeps very fine resolutions. | CHEN WeiHai JIANG Jun CHEN WenJie LIU JingMeng | 2013 | Science China(Technological Sciences)2013，56，8： | 1 |
| 6 | In-situ secondary growth of nanocube-based Prussian-blue film as an ultrasensitive biosensor显示文摘A regular nanostructure has been widely confirmed to result ina marked improvement in material performance in biosensing applications.In the present study,a regular nanostructured Prussian blue(PB) film with two heterogeneous crystal layers was synthesized in-situ using a secondary growth method.A PB seed layer was first controlled to form uniform cube-like crystal nuclei through an ultrasonic reaction with a single reactant.Then,well-defined 100 nm PB nanocubes were further crystallized on this seed layer using a self-assembly approach.In order to accelerate the electron transfer rate during the enzyme reaction for glucose detection,the graphene was used as the main cross-linker to immobilize glucose oxidase on the PB film.The as-prepared biosensor exhibited high electrocatalysis and electron conductivity for the detection of trace glucose with a sensitivity of141.5 μA mM^(-1) cm^(-2),as well as excellent anti-interference ability in the presence of ascorbic acid and uric acid under a low operation potential of-0.05 V. | Yu Liu Jingmeng Peng Danfeng Jiang Zhenyu Chu Wanqin Jin | 2017 | Progress in Natural Science:Materials International2017，27，3： | 0 |
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