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RISS 인기검색어
- 검색키워드
- 저자 : Fanjie Meng (검색결과 3 건)
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Aerodynamic Design and Multi-Objective Optimization of an Adjustable Blade Axial-Flow Fan
Fanjie Meng,Yingkun Zhang,Jin Xiong,Jingyin Li 한국유체기계학회 2022 International journal of fluid machinery and syste Vol.15 No.1
In this paper, the adjustable blade axial-flow fan is taken as the research object, and the primary aerodynamic design of the fan is carried out by the cascade method. Numerical calculation method is used to verify the aerodynamic performance of the preliminary design fan. The paper uses surrogate model and optimization algorithm to optimize the rotor of the preliminary design fan with a single objective, based on which the multi-objective optimization of the variable operating performance of the stator is carried out. The optimization results show that the total pressure and total pressure efficiency of the fan are significantly improved, and the bend angle and lean of the blade can improve the load distribution of the rotor and enhance the work capacity of the rotor. The optimization results for the stator reveal that there is a strong connection between the rotor and stator, and that a reasonable stator stagger angle will improve the variable operating performance of the fan.
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Meng, Yicun,Wang, Zhiwu,Jiang, Pingping,Wang, Wei,Chen, Fanji,Yan, Guozheng The Korean Institute of Power Electronics 2020 JOURNAL OF POWER ELECTRONICS Vol.20 No.4
Wireless power transfer (WPT) systems based on magnetic resonance provides a possible method to supply energy for implantable medical devices, such as gastrointestinal robots and wireless capsule endoscopes. However, low power transfer efficiency (PTE) (most researches show it to be lower than 3%) and poor power received stability are the key limitation of WPT systems in such applications. Three-coil WPT systems are regarded as an effective method to improve the power transfer efficiency and power received of gastrointestinal robots. Thus, an analytical model of a three-coil inductive link was established in this paper. Then the power transfer efficiency of load coil was optimized by changing the coil turns and raising a novel coil configuration: a Helmholtz-like load coil. As a result, the power transfer efficiency and power deliver to load (PDL) of this three-coil WPT system are tremendously improved. To verify the proposed design, a prototype simulated the gastrointestinal robot working situation and it was implemented for an experimental test. The results obtained from the experimental test demonstrate that the proposed three-coil WPT system with 9 turns load coil and 40 turns receiving coil achieves a PTE of 4.32% and a PDL of 541.5 mW. Moreover, the best PTE attained by the novel Helmholtz-like load coil was 6.45% and the PDL was 845 mW.
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Dongyang Shang,Xiaopeng Li,Fanjie Li,Meng Yin 제어·로봇·시스템학회 2022 International Journal of Control, Automation, and Vol.20 No.5
A dual-flexible manipulator with an axially translating arm is composed of a motor, a flexible joint, and a flexible load that can be telescopic. The friction torque at the motor, the time-varying characteristics of load parameters, as well as the flexibility of joints and loads will cause the vibration of the manipulator. Transverse vibration will affect the movement accuracy of the end-effector. In this paper, a fuzzy adaptive PI control strategy containing disturbance observers (DOB) is used to reduce the fluctuation of the servo system’s output speed, thereby suppressing the vibration of the manipulator. Firstly, the dynamical model of the dual-flexible manipulator considering the friction torque is established. Then, the low-pass filter in the DOB is designed, and the PI controller parameters are adjusted in real-time by the fuzzy adaptive control strategy. Finally, the numerical simulation analysis and experiments of the dual-flexible manipulator are carried out. The simulation and experimental results show that; 1) The DOB can effectively eliminate the influence of friction torque; 2) The control strategy can reduce the output speed error. Therefore, the control strategy proposed in this paper can effectively reduce the vibration of the dual-flexible manipulator with an axially translating arm to improve the movement accuracy of the end-effector.
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