检索结果-内蒙古大学图书馆

physics-based modeling of twisted and coiled artificial muscles (TCAMs) for soft robotics using extended Cosserat theory of rods

引用

SMART MATERIALS AND STRUCTURES 2025年第4期34卷 045015-045015页

作者： Golestaneh, Amirreza Fahim Cichella, Venanzio Lamuta, Caterina Univ Iowa Dept Mech Engn Iowa City IA 52242 USA

The current work develops a physics-based model for twisted and coiled artificial muscles (TCAMs) using the extended Cosserat theory of rods. These artificial muscles are lightweight and low-cost, generating a high power-to-weight ratio. They produce tensile forces up to 12 600 times their own weight, closely mimicking the functionality of biological muscles. The contraction of these muscles is driven by the anisotropic volume expansion of their twisted fibers, induced by deformation of the fibers' cross-section. Unlike prior models, this study implements the extended Cosserat theory, which models not only rigid rotations (like standard Cosserat theory) but also planar anisotropic deformation of the TCAMs' cross-section. The static deformation and dynamic motion of TCAMs are formulated herein. The governing equations for the bulk deformation of TCAMs are derived through standard Cosserat rod theory, while a continuum mechanics approach is utilized to model the cross-sectional deformation. The Bernstein polynomial method is applied to discretize the continuous formulations, enabling numerical solutions to the problem. Experimental datasets are used for evaluation of the models.

关键词： physics-based modeling extended Cosserat theory of rods continuum mechanics soft robotics twisted and coiled artificial muscles (TCAMs) Bernstein polynomials

来源：评论

学校读者我要写书评

暂无评论

physics-based modeling of metal additive manufacturing processes: a review

引用

INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY 2024年第1-2期134卷 1-13页

作者： Xu, Shuozhi Araghi, Mohammad Younes Su, Yanqing Univ Oklahoma Sch Aerosp & Mech Engn Norman OK 73019 USA Utah State Univ Dept Mech & Aerosp Engn Logan UT USA

In the modern world, the ubiquity and critical importance of metallic materials are evident in everything from infrastructure and transportation to electronics and aerospace. Additive manufacturing (AM) of metals has revolutionized traditional production methods by enabling the creation of high-value components with topologically optimized complex geometries and functionalities. This review addresses the critical need for sophisticated physics-based models to investigate and optimize the AM processes of metals. We explore both melt-based and solid-state AM techniques, highlighting the current state-of-the-art modeling approaches. The purpose of this review is to evaluate existing models, identify their strengths and limitations, and suggest areas for future research to enhance the predictability and optimization of AM processes. By summarizing and comparing various modeling techniques, this review aims to provide a comprehensive understanding of the current research landscape. We focus on the pros and cons of different models, including their applicability to key elements and processes common to both melt-based and solid-state AM methods. Where multiple models exist for a single technique, a comparison is drawn to highlight their relative pros and cons. Concluding this review, we contemplate prospective advancements in sophisticated physics-based process modeling and strategies for their integration with models for structure-properties relations.

关键词： Additive manufacturing physics-based modeling Metallic materials

来源：评论

学校读者我要写书评

暂无评论

physics-based modeling and multi-objective parameter optimization of excitation coil for giant magnetostrictive actuator used on fuel injector

引用

MEASUREMENT & CONTROL 2022年第5-6期55卷 421-436页

作者： Rong, Ce He, Zhongbo Xue, Guangming Zhou, Jingtao Zhao, Zhenglong Army Engn Univ Dept Vehicle & Elect Engn Shijiazhuang Campus97 Heping West Rd Shijiazhuang 050003 Hebei Peoples R China Troop 63969 Anhuaicun452Anhuai Rd Nanjing 210028 Peoples R China High Tech Inst Qingzhou Peoples R China

Serving as one of the core component, the excitation coil can exert remarkable influence on the output performance of giant magnetostrictive actuator (GMA) for electronic controlled fuel injector. In this paper, a multi-objective coil optimization scheme is proposed to balance the conflicting response speed and magnetic field intensity determined by the coil parameters. Firstly, a physics-based coil model is established for optimization, whose parameters can be directly calculated by the coil dimensions. Then, with the current response of the coil calculated, a multi-objective optimization framework is conducted attempting to get the selection guideline for the enameled wire diameter of the coil. The optimal choices exist when the outer diameter of the enameled wire falls in 0.9 similar to 1.6 mm, and the inner/outer diameter ratio is relatively high. Finally, a series of experiments are conducted and the results indicate that the proposed model is able to accurately describe the current response throughout the operating frequencies, and the optimization scheme can provide a valuable roadmap to design coil for high performance GMA.

关键词： physics-based modeling giant magnetostrictive actuator electronic controlled injector excitation coil model current response multi-objective optimization

来源：评论

学校读者我要写书评

暂无评论

physics-based modeling of Parasitic Capacitance in Medium-Voltage Filter Inductors

引用

IEEE TRANSACTIONS ON POWER ELECTRONICS 2021年第1期36卷 829-843页

作者： Zhao, Hongbo Dalal, Dipen Narendra Bjorn Jorgensen, Asger Jorgensen, Jannick Kjar Wang, Xiongfei Beczkowski, Szymon Munk-Nielsen, Stig Uhrenfeldt, Christian Aalborg Univ Dept Energy Technol DK-9220 Aalborg Denmark

This article proposes a general physics-based model for identifying the parasitic capacitance in medium-voltage (MV) filter inductors, which can provide analytical calculations without using empirical equations and is not restricted by the geometrical structures of inductors. The elementary capacitances of the MV inductor are identified, then the equivalent capacitances between the two terminals of the inductor are derived under different voltage potential on the core. Further, a three-terminal equivalent circuit, instead of the conventional two-terminal equivalent circuit, is proposed by using the derived capacitances. Thus, the parasitic equivalent capacitance between the terminals and the core are explicitly quantified. Experimental measurements for parasitic capacitances show a good agreement with the theoretical calculations.

关键词： Inductors Capacitance Couplings Mathematical model Solid modeling Integrated circuit modeling Windings Filter inductors medium-voltage (MV) parasitic capacitance physics-based modeling three-terminal equivalent circuit

来源：评论

学校读者我要写书评

暂无评论

physics-based modeling and Scalable Optimization of Large Intelligent Reflecting Surfaces

引用

IEEE TRANSACTIONS ON COMMUNICATIONS 2021年第4期69卷 2673-2691页

作者： Najafi, Marzieh Jamali, Vahid Schober, Robert Poor, H. Vincent Univ Erlangen Nurnberg Inst Digital Commun D-91058 Erlangen Germany Princeton Univ Dept Elect Engn Princeton NJ 08544 USA

Intelligent reflecting surfaces (IRSs) have the potential to transform wireless communication channels into smart reconfigurable propagation environments. To realize this new paradigm, the passive IRSs have to be large, especially for communication in far-field scenarios, so that they can compensate for the large end-to-end path-loss, which is caused by the multiplication of the individual path-losses of the transmitter-to-IRS and IRS-to-receiver channels. However, optimizing a large number of sub-wavelength IRS elements imposes a significant challenge for online transmission. To address this issue, in this article, we develop a physics-based model and a scalable optimization framework for large IRSs. The basic idea is to partition the IRS unit cells into several subsets, referred to as tiles, model the impact of each tile on the wireless channel, and then optimize each tile in two stages, namely an offline design stage and an online optimization stage. For physics-based modeling, we borrow concepts from the radar literature, model each tile as an anomalous reflector, and derive its impact on the wireless channel for a given phase shift by solving the corresponding integral equations for the electric and magnetic vector fields. In the offline design stage, the IRS unit cells of each tile are jointly designed for the support of different transmission modes, where each transmission mode effectively corresponds to a given configuration of the phase shifts that the unit cells of the tile apply to an impinging electromagnetic wave. In the online optimization stage, the best transmission mode of each tile is selected such that a desired quality-of-service (QoS) criterion is maximized. We consider an exemplary downlink system and study the minimization of the base station (BS) transmit power subject to QoS constraints for the users. Since the resulting mixed-integer programming problem for joint optimization of the BS beamforming vectors and the tile transmission modes is

关键词： Optimization Wireless communication Receivers Surface waves Quality of service Solid modeling Radar cross-sections Intelligent reflecting surfaces (IRSs) physics-based modeling two-stage optimization anamolous reflection codebook design

来源：评论

学校读者我要写书评

暂无评论

Control-Oriented Data-Driven and physics-based modeling of Maximum Pressure Rise Rate in Reactivity Controlled Compression Ignition Engines

引用

SAE INTERNATIONAL JOURNAL OF ENGINES 2023年第6期16卷 711-722页

作者： Irdmousa, Behrouz Khoshbakht Basina, L. N. Aditya Naber, Jeffrey Velni, Javad Mohammadpour Borhan, Hoseinali Shahbakhti, Mahdi Michigan Technol Univ Mech Engn Engn Mech Dept Houghton MI 49931 USA Clemson Univ Dept Mech Engn Clemson SC USA Cummins Inc Columbus MS USA Univ Alberta Dept Mech Engn Edmonton AB Canada

Reactivity controlled compression ignition (RCCI) is a viable low-temperature combustion (LTC) regime that can provide high indicated thermal efficiency and very low nitrogen oxides (NOx) and particulate matter (PM) emissions compared to the traditional diesel compression ignition (CI) mode [1]. The burn duration in RCCI engines is generally shorter compared to the burn duration for CI and spark-ignition (SI) combustion modes [2, 3]. This leads to a high pressure rise rate (PRR) and limits their operational range. It is important to predict the maximum pressure rise rate (MPRR) in RCCI engines and avoid excessive MPRRs to enable safe RCCI operation over a wide range of engine conditions. In this article, two control-oriented models are presented to predict the MPRR in an RCCI engine. The first approach includes a combined physical and empirical model that uses the first principle of thermodynamics to estimate the PRR inside the cylinder, and the second approach estimates MPRR through a machine learning method based on kernelized canonical correlation analysis (KCCA) and linear parameter-varying (LPV) methods. The KCCA-LPV approach proved to have higher prediction accuracy compared to physics-based modeling while requiring less amount of calibration. The KCCA-LPV approach could estimate MPRR with an average error of 47 kPa/CAD while the physics-based approach's average estimation error was 87 kPa/CAD. [GRAPHICS] .

关键词： RCCI engine Maximum pressure rise rate Control-oriented model Data-driven modeling physics-based modeling

来源：评论

学校读者我要写书评

暂无评论

physics-based modeling for Determining Transient Current Flow In Multi-layer PCB PI Designs

Physics-Based Modeling for Determining Transient Current Flo...

引用

IEEE International Symposium on Electromagnetic Compatibility, Signal and Power Integrity (EMCSI)

作者： Ding, Yifan Doyle, Matthew S. Connor, Samuel Becker, Dale Drewniak, James L. Missouri Univ Sci & Technol EMC Lab Rolla MO 65401 USA IBM Corp Armonk NY 10504 USA

ISBN: (数字)9781665409292

ISBN: (纸本)9781665409292

A physics-based modeling methodology for determining the transient current flow path in multi-layer PI designs is given in this paper using a commercial board with a complicated structure as an example. Board structure analysis is done first to provide a physical basis of post-layout analytical and equivalent circuit modeling. A match of the PDN impedance between commercial tool simulation, post-layout analytical calculation, and the physics-based equivalent circuit modeling was achieved to support the model for the transient simulation. By analyzing the current response in all the vias, a clear representation of transient current flow across all via segments can be given layer-by-layer. The maximum current density in vertical vias can also be extracted in this process, providing a reference for preventing transient overcurrent design.

关键词： Power Distribution Network (PDN) physics-based modeling Transient Current Flow

来源：评论

学校读者我要写书评

暂无评论

physics-based Reliability modeling for Control Applications: Adaptative Control Allocation

引用

IEEE ACCESS 2024年 12卷 161054-161074页

作者： Liscouet, Jonathan Desrosiers, Joshua Heit, Zac Uwantare, Ishimwe Remoundos, Andrew Senouci, Anas Concordia Univ Mech Ind & Aerosp Engn Montreal PQ H3G 1M8 Canada

Unmanned Aerial Vehicles (UAVs) are increasingly utilized across various industries, necessitating high reliability to ensure safety and reduce operational costs. This paper introduces a systematic methodology for physics-based reliability modeling tailored for UAV control applications, focusing on adaptive control allocation to optimize reliability. The study addresses the limitations of conventional degradation-independent behavior factor-based models, which often rely on inaccurate degradation models due to the lack of parameterization data sources and methods. By replacing time with stress-derived variables in the reliability function, this approach enables the combination of any time-dependent reliability functions with any stress-life relationships, allowing for real-time physics-based reliability assessments. The approach is demonstrated through the development and application of models for electronic speed controllers within a hexarotor UAV, using a virtual prototype for flight simulation. Simulation results reveal that physics-based models improve reliability prediction accuracy compared to conventional proportional hazard models, particularly due to their reliance on published and manufacturer's data for parameterization. The paper concludes by highlighting the need for future research to simplify the integration of stress factor online measurements, addressing the complexity and data requirements inherent in physics-based models.

关键词： Reliability Adaptation models Degradation Autonomous aerial vehicles Resource management Load modeling Mathematical models Predictive models Systematics Data models Adaptative control degradation model electronic speed controller (ESC) multirotor systems physics-based modeling reliability unmanned aerial vehicles (UAVs)

来源：评论

学校读者我要写书评

暂无评论

Using voltammetry augmented with physics-based modeling and Bayesian hypothesis testing to identify analytes in electrolyte solutions

引用

JOURNAL OF ELECTROANALYTICAL CHEMISTRY 2022年第0期904卷 115751-115751页

作者： Fenton, Alexis M., Jr. Brushett, Fikile R. MIT Dept Chem Engn 77 Massachusetts Ave Cambridge MA 02139 USA

Voltammetry is a foundational electrochemical technique that can qualitatively and quantitatively probe electroactive species in solutions and as such has been used in numerous fields of study. Recently, automation has been introduced to extend the capabilities of voltammetric analysis through approaches such as Bayesian parameter estimation and compound identification. However, opportunities exist to enable more versatile methods across a wider range of solution compositions and experimental conditions. Here, we present a protocol that uses experimental voltammetry, physics-driven models, binary hypothesis testing, and Bayesian inference to enable robust labeling of analytes in multicomponent solutions across multiple techniques. We first describe the development of this protocol, and we subsequently validate the methodology in a case study involving five N-functionalized phenothiazine derivatives. In this analysis, the protocol correctly labels solutions each containing 10H-phenothiazine and 10-methylphenothiazine from both cyclic voltammograms and cyclic square wave voltammograms, demonstrating the ability to identify redox-active constituents of a multicomponent solution. Finally, we identify areas of further improvement-such as achieving greater detection accuracy-and future applications to potentially enhance in situ or operando diagnostic workflows.

关键词： Cyclic voltammetry Cyclic square wave voltammetry Analyte identification Bayesian inference physics-based modeling Phenothiazine

来源：评论

学校读者我要写书评

暂无评论

Recent Progress in physics-based modeling of Electromigration in Integrated Circuit Interconnects

引用

MICROMACHINES 2022年第6期13卷 883-883页

作者： Zhao, Wen-Sheng Zhang, Rui Wang, Da-Wei Hangzhou Dianzi Univ Sch Elect & Informat Zhejiang Prov Key Lab Large Scale Integrated Circ Hangzhou 310018 Peoples R China Cadence Design Syst Inc San Jose CA 95134 USA

The advance of semiconductor technology not only enables integrated circuits with higher density and better performance but also increases their vulnerability to various aging mechanisms which occur from front-end to back-end. Analysis on the impact of aging mechanisms on circuits' reliability is crucial for the design of reliable and sustainable electronic systems at advanced technology nodes. As one of the most crucial back-end aging mechanisms, electromigration deserves research efforts. This paper introduces recent studies on physics-based modeling of electromigration aging of on-chip interconnects. At first, the background of electromigration is introduced. The conventional method and physics-based modeling for electromigration are described. Then studies on how electromigration affects powers grids and signal interconnects are discussed in detail. Some of them focus on the comprehensiveness of modeling methodology, while others aim at the strategies for improving computation accuracy and speed and the strategies for accelerating/decelerating aging. Considering the importance of electromigration for circuit reliability, this paper is dedicated to providing a review on physics-based modeling methodologies on electromigration and their applications for integrated circuits interconnects.

关键词： integrated circuit interconnects aging reliability electromigration physics-based modeling

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：