Frontiers of Mechanical Engineering
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A brief review on key technologies in the battery management system of electric vehicles
Frontiers of Mechanical Engineering - Tập 14 - Trang 47-64 - 2018
Batteries have been widely applied in many high-power applications, such as electric vehicles (EVs) and hybrid electric vehicles, where a suitable battery management system (BMS) is vital in ensuring safe and reliable operation of batteries. This paper aims to give a brief review on several key technologies of BMS, including battery modelling, state estimation and battery charging. First, popular ......
Design and analysis of a class of redundant collaborative manipulators with 2D large rotational angles
Frontiers of Mechanical Engineering - Tập 15 - Trang 66-80 - 2019
The parallel spindle heads with high rotational capability are demanded in the area of multi-axis machine tools and 3D printers. This paper focuses on designing a class of 2R1T (R: Rotation; T: Translation) parallel spindle heads and the corresponding collaborative 5-axis manipulators with 2-dimension (2D) large rotational angles. In order to construct 2D rotational degrees of freedom (DOFs), a pl......
Gained switching-based fuzzy sliding mode control for a discrete-time underactuated robotic system with uncertainties
Frontiers of Mechanical Engineering - Tập 16 - Trang 353-362 - 2021
This study proposes a gained switching-based discrete-time sliding mode control method to address the chattering issue in disturbed discrete-time systems, which suffer from various unknown uncertainties. Through the new structure of the designed reaching law, the proposed method can effectively increase the convergence speed while guaranteeing chattering-free control. The performance of controllin......
Optimum design and preliminary experiments of a novel parallel end traction apparatus for upper-limb rehabilitation
Frontiers of Mechanical Engineering - Tập 16 - Trang 726-746 - 2021
Robot-assisted technology has been increasingly employed in the therapy of post stroke patients to deliver high-quality treatment and alleviate therapists’ burden. This paper introduces a novel parallel end traction apparatus (PETA) to supplement equipment selection. Considering the appearance and performance of the PETA, two types of special five-bar linkage mechanisms are selected as the potenti......
Singularity and workspace analysis of three isoconstrained parallel manipulators with schoenflies motion
Frontiers of Mechanical Engineering - - 2012
Vibration characteristics and machining performance of a novel perforated ultrasonic vibration platform in the grinding of particulate-reinforced titanium matrix composites
Frontiers of Mechanical Engineering - Tập 18 - Trang 1-17 - 2023
Ultrasonic vibration-assisted grinding (UVAG) is an advanced hybrid process for the precision machining of difficult-to-cut materials. The resonator is a critical part of the UVAG system. Its performance considerably influences the vibration amplitude and resonant frequency. In this work, a novel perforated ultrasonic vibration platform resonator was developed for UVAG. The holes were evenly arran......
Optimal slot dimension for skirt support structure of coke drums
Frontiers of Mechanical Engineering - Tập 13 - Trang 554-562 - 2018
The skirt-to-shell junction weld on coke drums is susceptible to fatigue failure due to severe thermal cyclic stresses. One method to decrease junction stress is to add slots near the top of the skirt, thereby reducing the local stiffness close to the weld. The most common skirt slot design is thin relative to its circumferential spacing. A new slot design, which is significantly wider, is propose......
ZnO nanorefrigerant in R152a refrigeration system for energy conservation and green environment
Frontiers of Mechanical Engineering - - 2014
Fatigue features study on the crankshaft material of 42CrMo steel using acoustic emission
Frontiers of Mechanical Engineering - Tập 11 - Trang 233-241 - 2016
Crankshaft is regarded as an important component of engines, and it is an important application of remanufacturing because of its high added value. However, the fatigue failure research of remanufactured crankshaft is still in its primary stage. Thus, monitoring and investigating the fatigue failure of the remanufacturing crankshaft is crucial. In this paper, acoustic emission (AE) technology and ......
An isogeometric numerical study of partially and fully implicit schemes for transient adjoint shape sensitivity analysis
Frontiers of Mechanical Engineering - Tập 15 - Trang 279-293 - 2020
In structural design optimization involving transient responses, time integration scheme plays a crucial role in sensitivity analysis because it affects the accuracy and stability of transient analysis. In this work, the influence of time integration scheme is studied numerically for the adjoint shape sensitivity analysis of two benchmark transient heat conduction problems within the framework of ......
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