Design and Optimization of Electromagnetic Structures for Linear ISG Used in Range-Extended Electric Vehicle

According to the operating requirements of the linear range-extender used in range-extended electric vehicle, as well as structures and performances of the self-developed linear engine, a tubular permanent magnet (PM) linear ISG is designed. The impact of varying electromagnetic structure on the performance is studied by finite element analysis (FEA) in electromagnetic field. On that basis, optimum structural parameters for the linear ISG are determined using multi-objective optimization. The results show that the self-designed linear ISG can meet the performance requirements. After optimization, the output power increases 8.7 percent; the no-load induced electromotive force increases 12.1 percent; the standard deviation of detent force shows a 94.6 percent reduction; the efficiency basically remains constant.

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Finite Element Analysis-Aided Performance Improvement of Circular Coil Assemblies Applied in Electric Vehicle Inductive Chargers

10.36227/techrxiv.16578263.v1 ◽

2021 ◽

Author(s):

Guodong Zhu ◽

Dawei Gao

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Electric Vehicle ◽

Performance Improvement ◽

Magnetic Circuit ◽

Element Analysis ◽

System Parameters ◽

Leakage Magnetic Field ◽

Fea Simulation ◽

The Impact

Energy efficiency and leakage magnetic field (LMF) are two important issues in inductive chargers. In this work, the maximum achievable coil efficiency and the corresponding LMF strength are formulated as functions of system parameters, and figure of merits (FOM) are proposed for assessing the efficiency and LMF performance of the coil assemblies. The target application is electric vehicle inductive chargers where the LMF is suppressed via passive shielding. The impact of the coil assembly’s geometric parameters on both FOMs is examined through a combination of finite element analysis (FEA) simulation and magnetic circuit analysis, and measures to improve the FOMs are studied Optimization of an exemplary coil assembly within given dimensional limits is conducted and the performance improvement is verified by FEA simulation results.

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Advanced Classical Optical Filters with Three Waveguide Coupled Sagnac Loop Reflectors

10.21203/rs.3.rs-424139/v1 ◽

2021 ◽

Author(s):

Hamed Arianfard ◽

Jiayang Wu ◽

Saulius Juodkazis ◽

David Moss

Keyword(s):

High Performance ◽

Structural Parameters ◽

Spectral Response ◽

Optical Filters ◽

Practical Applications ◽

Design And Optimization ◽

Fabrication Tolerances ◽

Spectral Ranges ◽

The Impact ◽

Mode Interference

Abstract We theoretically investigate advanced multi-functional integrated photonic filters formed by three waveguide coupled Sagnac loop reflectors (3WC-SLRs). By tailoring the coherent mode interference, the spectral response of the 3WC-SLR resonators is engineered to achieve diverse filtering functions with high performance. These include optical analogues of Fano resonances that yield ultrahigh spectral extinction ratios (ERs) and slope rates, resonance mode splitting with high ERs and low free spectral ranges, and classical Butterworth, Bessel, Chebyshev, and elliptic filters. A detailed analysis of the impact of the structural parameters and fabrication tolerances is provided to facilitate device design and optimization. The requirements for practical applications are also considered. These results theoretically verify the effectiveness of using 3WC-SLR resonators as multi-functional integrated photonic filters for flexible spectral engineering in diverse applications.

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Sizing Study and Validation of a Hybridized Fuel Cell NEV With Bi-Directional Grid Inter-Connect for Sustainable Local Transportation

Dynamic Systems and Control, Parts A and B ◽

10.1115/imece2006-15338 ◽

2006 ◽

Cited By ~ 1

Author(s):

Yann G. Guezennec ◽

Ta-Young Gabriel Choi ◽

Jeffrey Marusiak ◽

Benjamin Yurkovich ◽

Woongchul Choi

Keyword(s):

Fuel Cell ◽

Electric Vehicle ◽

Hybrid Electric Vehicle ◽

Control Strategies ◽

Urban Transportation ◽

Limited Resource ◽

Sustainable Mobility ◽

Design And Optimization ◽

Range Extender ◽

A Charge

Due to sharply increasing oil price, tremendous efforts are being made to reduce the dependencies on the petroleum based fuels in the field of automotive power trains. As one of the promising alternatives, fuel cell hybrid system has been studied for many different vehicle types from SUV to low speed vehicle. To establish systematic ways to achieve the optimized system configuration, in this paper, we introduce a methodology which combines energy analysis over typical drive cycles with a parametric sizing study for the various powertrain components as well as supervisory energy management parameters. For a practical and demonstrative implementation of the suggested methodology with a limited resource available at hand, a Neighborhood Electric Vehicle (NEV) for urban transportation is considered for a detailed analysis, design and optimization. Two major supervisory control strategies, namely, charge-sustaining and charge-depleting are carefully investigated to illustrate the versatility of our proposed methodology. Our study shows that the systems could be modeled and optimized either in a charge sustaining case or in a charge depleting case (plug-in hybrid electric vehicle) to meet vehicle purposes and usages, respectively. Not only because of the usage of the FC power system as a range extender for an EV, but also the possibility of using the plug-in configuration with renewable energy generation systems, as a personal eco-system, the proposed plug-in FC-NEV may be a solution for a local urban transportation system in this demanding era of sustainable mobility.

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Impact Performance of the G4(1W) and G4(2W) Guardrail Systems: Comparison Under NCHRP Report 350 Test 3-11 Conditions

Transportation Research Record Journal of the Transportation Research Board ◽

10.3141/1720-02 ◽

2000 ◽

Vol 1720 (1) ◽

pp. 7-18 ◽

Cited By ~ 14

Author(s):

Chuck A. Plaxico ◽

Malcolm H. Ray ◽

Kamarajugadda Hiranmayee

Keyword(s):

The United States ◽

Full Scale ◽

Nonlinear Finite Element ◽

Crash Test ◽

Test Vehicle ◽

Element Analysis ◽

Impact Performance ◽

Performance Requirements ◽

The Impact ◽

Standard Techniques

Several types of strong-post W-beam guardrails are used in the United States. Usually the only difference between one type of strong-post W-beam guardrail and another is the choice of post and block-out types. The impact performance of two very similar strong-post W-beam guardrails are compared—the G4(2W), which uses a 150×200 mm wood post and the G4(1W), which uses a 200×200 mm wood post. Although G4(2W) is used in numerous states, G4(1W) is now common only in the state of Iowa. The performance of the two guardrails has been presumed equal, but only one full-scale crash test has been performed on G4(1W) and that was over 30 years ago, using a now-obsolete test vehicle. The nonlinear finite element analysis program LS-DYNA was used to evaluate the crashworthiness of the two guardrails. The G4(2W) guardrail model was validated with the results of a full-scale crash test. A model of the G4(1W) guardrail system was developed, and the deflection, vehicle redirection, and occupant risk factors of the two guardrails were compared. The impact performance of the two guardrails was quantitatively compared using standard techniques. The analysis results indicate similar collision performance for G4(1W) and G4(2W) and show that both satisfy NCHRP Report 350 Test 3-11 safety performance requirements.

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Design and tests of a non-contact Bernoulli gripper for rough-surfaced and fragile objects gripping

Assembly Automation ◽

10.1108/aa-10-2019-0171 ◽

2020 ◽

Vol 40 (5) ◽

pp. 735-743

Author(s):

Dong Liu ◽

Minghao Wang ◽

Naiyu Fang ◽

Ming Cong ◽

Yu Du

Keyword(s):

Negative Pressure ◽

Simulation Analysis ◽

Structural Parameters ◽

Mathematic Model ◽

Parameters Optimization ◽

Dynamics Simulation ◽

Content Type ◽

Design And Optimization ◽

And Performance ◽

The Impact

Purpose Varied shapes and sizes of different products with irregular rough surface and fragile properties give a challenge to traditional contact gripping. Single Bernoulli grippers are not suited to handle fragile objects as the impact of center negative pressure force could result in large deformation and stress which damage the materials, and they are also have some limitations for gripping objects with different large and small shapes. Thus, this paper aims to design a non-contact gripper for soft, rough-surfaced and fragile objects gripping with multi Bernoulli heads, which have optimal structures and parameters. Design/methodology/approach The compressed air is ejected into four Bernoulli heads through radial and long flow channels, then passes through four strip-shaped narrow gaps after fully developing in the annular cavity to provide negative pressure. Based on the mathematic model and the computational model, the key structural parameters affecting the gripping performance are selected, and parameters optimization of the gripper is performed by computational fluid dynamics simulation analysis and performance evaluation. The orthogonal method is used and L16 orthogonal array is selected for experimental design and optimization. The characteristics of the designed gripper are tested from the aspects of pressure distribution and lifting force. Findings From the applications in gripping different objects, the designed non-contact gripper can grip varied shapes and sizes of soft, rough-surfaced, fragile and sliced objects with little effect of torque. Originality/value In this paper, a non-contact gripper is designed for handling soft, rough-surfaced and fragile objects based on the Bernoulli principle. A systematic approach, which consists of modeling, simulation, optimization and measurement is provided for the non-contact gripper design and tests.

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Finite Element Parametric Acoustic Modeling and Analysis of Ship Floating Cabins

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.333-335.2146 ◽

2013 ◽

Vol 333-335 ◽

pp. 2146-2150 ◽

Cited By ~ 1

Author(s):

Bing Nan Liang ◽

Hong Liang Yu

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Parametric Design ◽

Structural Parameters ◽

Sound Field ◽

Acoustic Modeling ◽

Element Analysis ◽

Modeling And Analysis ◽

Solid Models ◽

The Impact

The development of parametric calculation module program based on APDL, the completion of 3D acoustic modeling of a ship floating cabin, the selection of constraints according to the actual work situations, the finite element modal analysis of the overall cabin in the ANSYS environment and comparative analysis of a low-order vibration frequency of the cabin under different fire ratings. Acoustic calculation program of the fluid-structure interaction is used to analyze harmonic sound field and verify the impact of different thickness fireproof rockwools on the cabin acoustic performance. Parametric Design and Finite Element Analysis are combined to achieve the adjustment of the structural parameters of the complex models, automatically generate solid models and complete finite element analysis, which is important for the optimization of the acoustic design of the ship cabins.

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Collision simulation of potato on rod separator

International Journal of Food Engineering ◽

10.1515/ijfe-2020-0233 ◽

2021 ◽

Vol 0 (0) ◽

Author(s):

Weigang Deng ◽

Chunguang Wang ◽

Shengshi Xie

Keyword(s):

Contact Stress ◽

Structural Parameters ◽

Peak Force ◽

Optimized Design ◽

Drop Height ◽

Element Analysis ◽

Impact Peak ◽

The Finite Element Analysis ◽

Working Parameters ◽

The Impact

Abstract To obtain the collision characteristics of potatoes colliding with steel rods of different parameters, the finite element analysis (FEA) method was used to study the impact contact stress, collision displacement, acceleration and impact force. The results showed that with increasing rod diameter, the maximum collision displacement of the potato in the Y direction decreased, and the maximum collision acceleration and impact peak force increased. With increasing rod tilt angle and rod spacing, the maximum collision displacement increased linearly, but the maximum collision acceleration and impact peak force decreased linearly. Within the range of analysis factors, the fluctuation of the maximum collision displacement, acceleration and impact peak force caused by the change in rod diameters were the smallest, which were 0.34 mm, 38 m/s2 and 9 N, respectively. When potatoes collided with single and double rods, all the collision characteristics increased with the increase in potato drop height, and the results for double rods were significantly smaller than those for single rod collision. When the potato mass was 250 g, the drop height was 200 mm for single rod collision or 250 mm for double rod collision, the impact contact stress reached the yield stress, and the potato was damaged. This article provides a data basis and a referenced method for the optimized design of the structural parameters and working parameters of the rod separator in the process of potato mechanized harvesting.

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An Optimized Design of an Electric Vehicle Wireless Charging Coupling Coil

Journal of Physics Conference Series ◽

10.1088/1742-6596/2125/1/012035 ◽

2021 ◽

Vol 2125 (1) ◽

pp. 012035

Author(s):

Wei Xie ◽

Qi-gong Chen ◽

Shou-zhong Lei

Keyword(s):

Energy Loss ◽

Electric Vehicle ◽

Structural Parameters ◽

Transmission Efficiency ◽

Optimized Design ◽

Transmission Power ◽

Wireless Charging ◽

Element Analysis ◽

Charging System ◽

Coupling Coil

Abstract With the development of electric vehicle wireless charging technology, the transmission power and transmission efficiency of electric vehicle wireless charging system have become the focus of current research. The transmission power and efficiency of wireless charging system largely depend on the energy loss of two resonant coupling coils. The energy loss is mainly related to the structural parameters of the coupling coil and the coupling coefficient of the two coils. On this basis, the structure of the coupling coil is designed and optimized by using the finite element analysis software Maxwell, and a new combined transmitting coil structure is designed. Experiments and verification show that the coil design meets the requirements of transmission efficiency, which can provide a reference for the design of wireless charging coil of electric vehicle in the future.

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Analytical Design and Optimization of an Automotive Rubber Bushing

Shock and Vibration ◽

10.1155/2019/1873958 ◽

2019 ◽

Vol 2019 ◽

pp. 1-13 ◽

Cited By ~ 1

Author(s):

Jonathan Rivas-Torres ◽

Juan C. Tudon-Martinez ◽

Jorge de-J. Lozoya-Santos ◽

Ricardo A. Ramirez-Mendoza ◽

Andrea Spaggiari

Keyword(s):

Ride Comfort ◽

Structural Parameters ◽

Driving Safety ◽

Parameter Determination ◽

Element Analysis ◽

Characteristic Curves ◽

Design And Optimization ◽

Elastomeric Materials ◽

Trial And Error Method ◽

Noise Vibration

The ride comfort, driving safety, and handling of the vehicle should be designed and tuned to achieve the expectations defined in the company’s design. The ideal method of tuning the characteristics of the vehicle is to modify the bushings and mounts used in the chassis system. To deal with the noise, vibration and harshness on automobiles, elastomeric materials in mounts and bushings are determinant in the automotive components design, particularly those related to the suspension system. For most designs, stiffness is a key design parameter. Determination of stiffness is often necessary in order to ensure that excessive forces or deflections do not occur. Many companies use trial and error method to meet the requirements of stiffness curves. Optimization algorithms are an effective solution to this type of design problems. This paper presents a simulation-based methodology to design an automotive bushing with specific characteristic curves. Using an optimum design formulation, a mathematical model is proposed to design and then optimize structural parameters using a genetic algorithm. To validate the resulting data, a finite element analysis (FEA) is carried out with the optimized values. At the end, results between optimization, FEA, and characteristic curves are compared and discussed to establish the correlation among them.

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Three Coupled Waveguide Sagnac Loop Reflectors for High Performance Integrated Optical Filters

10.36227/techrxiv.13301474.v1 ◽

2020 ◽

Author(s):

David Moss

Keyword(s):

High Performance ◽

Structural Parameters ◽

Spectral Response ◽

Optical Filters ◽

Practical Applications ◽

Design And Optimization ◽

Integrated Optical ◽

Fabrication Tolerances ◽

Spectral Ranges ◽

The Impact

We theoretically investigate advanced multi-functional integrated photonic filters formed by three waveguide coupled Sagnac loop reflectors (3WC-SLRs). By tailoring the coherent mode interference, the spectral response of the 3WC-SLR resonators is engineered to achieve diverse filtering functions with high performance. These include optical analogues of Fano resonances that yield ultrahigh spectral extinction ratios (ERs) and slope rates, resonance mode splitting with high ERs and low free spectral ranges, and classical Butterworth, Bessel, Chebyshev, and elliptic filters. A detailed analysis of the impact of the structural parameters and fabrication tolerances is provided to facilitate device design and optimization. The requirements for practical applications are also considered. These results theoretically verify the effectiveness of using 3WC-SLR resonators as multi-functional integrated photonic filters for flexible spectral engineering in diverse applications.

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