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Smart Rear Underrun Safety Shield (Sruss) for Hybrid Vehicles to Prevent Collisions with the Rear of Heavy Trailers

Journal of engineering Science and Technology Review 2024年第4期17卷 83-98页

作者： Patil, Rajesh V. Department of Mechanical – Robotics & Automation Engineering MIT World Peace University Maharashtra Pune India

The deadliest accident ratio for cars and trucks on highways occurs when vehicles are running underneath trucks, causing serious and even fatal injuries to the occupants of the vehicle. When heavyweight trucks collide with automobiles, passengers in the car are not shielded from potentially deadly injuries by the back safety shield's improper geometry. A Smart Rear Underrun Safety Shield (SRUSS) for rear impact and rear underrunning of hybrid passenger cars and heavyduty trailers was created because of this work. According to testing conducted by the Vehicle Research and Development Establishment (VRDE), the current safety shield has higher distortion. Finite element analysis was used to model and test the cleverly adapted safety shield under Indian Standard 14812-2005 regulatory circumstances. Additionally, it was produced and tested internally with the same regulatory requirements. A certified testing setup was used to effectively confirm the safety shield. Through accreditation from the Automobile Research Association of India (ARAI) and real-world verification testing at VRDE, the performance of a proposed Smart Rear Underrun Safety Shield (SRUSS) for hybrid vehicles was examined. The results obtained have satisfied the road transport safety standards of the Indian Standard 14812-2005. © 2024 School of Science, DUTH. All rights reserved.

关键词： Trucks

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A trajectory-level robot skill learning method based on fuzzy systems

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Science China(Information Sciences) 2025年第5期68卷 38-52页

作者： Chao ZENG Zhen DENG Boyang TI Yongsheng GAO Department of Computer Science University of Liverpool School of Mechanical Engineering and Automation Fuzhou University State Key Laboratory of Robotics Shenyang Institute of Automation Chinese Academy of Sciences Institutes for Robotics and Intelligent Manufacturing Chinese Academy of Sciences State Key Laboratory of Robotics and System Harbin Institute of Technology

Learning from demonstration(LfD) allows for the effective transfer of human manipulation skills to a robot by building a model that represents these skills based on a limited number of demonstrated ***,a skilllearning model that can comprehensively satisfy multiple requirements,such as computational complexity,modeling accuracy,trajectory smoothness,and robustness,is still ***,this work aims to provide such a model by employing fuzzy ***,we introduce an LfD model named Takagi-Sugeno-Kang fuzzy system-based movement primitives(TSKFMPs),which exploits the advantages of the fuzzy theory for effective robotic imitation learning of human *** work formulates the TSK fuzzy system and gradient descent(GD) as imitation learning models,leveraging recent advancements in GD-based optimization for fuzzy *** study takes a two-step strategy.(ⅰ) The input-output relationships of the model are established using TSK fuzzy systems based on demonstration *** this way,the skill is encoded by the model parameter in the latent space.(ⅱ) GD is used to optimize the model parameter to increase the modeling accuracy and trajectory *** further explain how learned trajectories are adapted to new task scenarios through local *** conduct multiple tests using an open dataset to validate our method,and the results demonstrate performance comparable with those of other ***,we implement it in a real-world case study.

关键词： robot skill learning movement primitives TSK fuzzy systems gradient descent robotics

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Characterization and mechanical Behaviour of Nano-Al2O3 Reinforced Polymer Composites

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Journal of The Institution of Engineers (India): Series D 2024年 1-12页

作者： Mahesh, K.S. Satheesh, J. Department of Robotics & amp Automation JSS Academy of Technical Education Bengaluru India Department of Mechanical Engineering SJB Institute of Technology Bengaluru India

This study presents an experimental investigation into the mechanical behaviour and characterisation of Nano-Al2O3 reinforced polymer composites, aiming to enhance the understanding of their structural performance. The incorporation of nanoscale Al2O3 particles into polymer matrices has gained attention for its potential to improve the mechanical properties of the resulting composites. In this research, 1 wt% Nano-Al2O3 was dispersed within a polymer matrix through a systematic fabrication process. The mechanical behaviour of the developed composites was evaluated through a comprehensive set of experiments, including compression testing, flexural testing, and impact testing. The results provided insights into the effects of Nano-Al2O3 content on the strength, stiffness, and impact resistance of the composites. Microstructural characterisation using techniques such as scanning electron microscopy and X-ray diffraction were employed to analyse the dispersion of nanoparticles and the resulting changes in the composite structure. The findings from this experimental investigation contribute to the current knowledge base on Nano-Al2O3 reinforced polymer composites and offer valuable information for optimising the fabrication process to achieve desired mechanical properties. © The Institution of Engineers (India) 2024.

关键词： Compression testing

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Recent Advancement in Bioabsorbable Metals and Their Alloys for Implant Application—a Review

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Journal of The Institution of Engineers (India): Series D 2024年 1-17页

作者： Kadam, K.S. Gadakh, V.S. Department of Mechanical Engineering Dr. Vithalrao Vikhe Patil College of Engineering Ahmednagar414111 India Department of Automation and Robotics Engineering Amrutvahini College of Engineering Sangamner Ahmednagar422608 India

The emergence of bioabsorbable implant materials has generated significant enthusiasm in medical and engineering research. The present systematic review study thoroughly examines the development, characteristics, uses, and difficulties associated with bioabsorbable materials, specifically emphasizing magnesium, zinc, iron, and alloys. Bioabsorbable implant materials have become popular in orthopaedic and dental surgery because they enhance tissue regeneration while minimizing foreign body responses. Using bioabsorbable implant materials can lessen the requirement for implant removal operations while also improving patient outcomes. Developing bioabsorbable implant materials is a fascinating field of study with the potential to transform medical implant technology. The present systematic review study thoroughly examines the development, characteristics, uses, and difficulties associated with bioabsorbable materials, specifically emphasizing magnesium, zinc, iron, and alloys. The novelty of the present review is that a roadmap for future research is outlined. Thus, the present review thoroughly analyses the latest discoveries in bioabsorbable materials, providing valuable insights that could improve implant technology and significantly transform medical treatments and patient care. © The Institution of Engineers (India) 2024.

关键词： Magnesium alloys

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High-Velocity Projectile Impact Behaviour of Friction Stir Welded AA7075 Thick Plates

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Defence Technology（防务技术） 2023年第11期29卷 153-163页

作者： R.Praveen S.R.Koteswara Rao G.Selvakumar R.Damodaram Department of Robotics and Automation Karpaga Vinayaga College of Engineering and TechnologyChengalpattu603308TamilNaduIndia Department of Mechanical Engineering Sri Sivasubramaniya Nadar College of EngineeringChennai603110TamilNaduIndia

In this study, high velocity impact behaviour of friction stir welded AA7075-T651 25 mm thick plates were investigated using a 7.62 mm × 51 mm lead core and 7.62 mm × 39 mm steel core projectiles. Prior to ballistic trails, mechanical and metallurgical properties of friction stir welded AA 7075-T651 25 mm thick plates were studied. Microstructural and hardness studies revealed that friction stir welds constituted three distinct regions namely Weld Nugget(WN), Thermo-mechanically Affected Zone(TMAZ) and Heat Affected Zone(HAZ). Base Material(BM) and all three weld regions were ballistically tested as per military standard NIJ.0108.01 using lead and steel core bullets at maximum permissible velocities of 830 ± 20 and 700 ± 30 m/s, respectively. It has been found that base material(AA7075-T651)and all three weld regions of 25 mm thick plates were able to resist perforation by both types of projectiles used. However depth of penetration has been found to increase from BM to WN, HAZ and TMAZ for both types of projectiles. In all cases steel core projectiles caused higher depth of penetration compared to those caused by lead core projectiles. TMAZs of the friction stir welds were found to be the weakest zone. The fracture that occurred in the base material was spall fragmentation indicating brittle failure, whereas all zones of friction stir welded AA7075-T651 targets with a front petalling, indicating ductile failure. The post-ballistic tested samples showed no significant change in the microstructure of the BM and WN. On the other hand, TMAZ and HAZ showed severe grain deformation in the direction of projectile penetration, and the formation of adiabatic shear bands(ASB). This work showed that 25 mm thick friction stir welded AA7075-T651 joints responded well to ballistic impact loads, making them a good choice for light combat vehicles.

关键词： Aluminum alloy Thick plate Friction stir welding Ballistic performance Depth of penetration

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Exploring the role of graphene filler on mechanical properties of cotton/viscose hybrid composites

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Interactions 2024年第1期245卷 1-9页

作者： K, Arunkumar S, Seenivasan M S, Sureshkumar C, Chanakyan Bordoloi, Namrata P, Ramkumar Department of Mechanical Engineering MVJ College of Engineering College Bangalore560067 India Department of Mechanical Engineering Rathinam Technical Campus Coimbatore641021 India Department of Robotics and Automation Sri Ramakrishna Engineering College Coimbatore641022 India Department of Mechanical Engineering.Kalasalingam Academey of Research and Education Virudhunagar India

The work intends to prepare a cotton/viscose fabric-reinforced hybrid composite (CVFRHC) using a compression moulding process using graphene as a filler material and investigate the mechanical characteristics of the composite, including its tensile strength, flexural strength, impact strength, and hardness. The graphene filler was combined with the matrix material in several proportions: 1 weight% (wt%), 2 wt%, and 3 wt%. It was found that the mechanical characteristics of the composite were enhanced by the filler addition. With an increased tensile strength of 70.9 MPa and flexural strength of 384 MPa, the hybrid composite containing 3-weight% graphene was shown to be effective. The addition of 3 wt% resulted in improvements of 10.6% in tensile strength and 9.6% in flexural strength. The graphene as a nano filler used to enhance the mechanical properties of the polymer matrix compisites. This is due to the proper dispersion of graphene filler with the polymer matrix which leads to enhance the interfacial bonding between the hybrid matrix and the hybrid fibres. © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2024.

关键词： Hybrid composites

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Effects of Addition of Graphite on the Tribological Behaviour of Al7075-SiC Hybrid Composites Using Design of Experiments

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Journal of Bio- and Tribo-Corrosion 2024年第3期10卷 1-11页

作者： Gudipalli, Krishna Reddy V Chapke, Yashwant Guddhur, Hareesha Doddamani, Saleemsab Department of Mechanical Engineering Government Polytechnic Channasandra Karnataka Bangalore India Department of Automation & amp Robotics JSPM’S Rajarshi Shahu College of Engineering Maharashtra Pune India Department of Mechanical Engineering Government Engineering College Karnataka HuvinaHadagali India Department of Mechanical Engineering National Institute of Technology Karnataka Karnataka Surathkal India

Despite the widespread use of Al7075-SiC composites in various engineering applications, their tribological performance remains a subject of interest due to challenges related to friction and wear. This study addresses the need for improved lubrication in such composites by investigating the potential of Al7075-SiC/Graphite hybrid materials. The incorporation of graphite particles, up to 9% by weight, aims to enhance the self-lubricating properties of these composites. Stir casting is employed to fabricate specimens with varying graphite content (3–9% by weight), followed by comprehensive tribological assessments under dry sliding conditions. Factors including sliding distance, load, and graphite composition are systematically evaluated using Taguchi’s optimization techniques, including design of experiments, ANOVA, and regression analyses. Results reveal that the addition of 9% graphite content notably reduces both the coefficient of friction and wear rate. According to the data, sliding distance significantly impacts wear behaviour, followed by the applied load. In contrast, the composition has a 77% impact on the coefficient of friction than load, while the sliding distance has a relatively small impact. As a result, the Al7075-SiC/Graphite composite material demonstrated its suitability as a self-lubricating substance. © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2024.

关键词： Silicon carbide

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Examining the Impact of Metallurgical and Optimised Machining Parameters on Inconel 713C Superalloy Using the Taguchi Technique

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Journal of The Institution of Engineers (India): Series D 2024年 1-11页

作者： Suryawanshi, Vinayak P. Deshmukh, Prashant D. Chapke, Yashwant Department of Mechanical Engineering Datta Meghe College of Engineering Airoli Navi Mumbai400708 India Department of Automation & amp Robotics JSPM’S Rajarshi Shahu College of Engineering Maharashtra Pune India

This study examined the metallurgical properties of Inconel 713C superalloy and the impact of utilising the Taguchi technique to optimise machining settings. The cutting tool was a strong carbide substance coated with WC-TiAlN. The impact of cutting force parameters and surface roughness was observed on the Inconel 713C superalloy. The goal of using Taguchi was to maximise the limitations for spinning Inconel 713C alloy at high speeds. An orthogonal array of L27 was used. In order to assess the microstructural and compositional changes, metallurgical tests were conducted. Compared to tool inserts that have not been treated, the EDS scans showed that there is less material deposition on the workpiece. As a result, there was reduced cutting force, friction, and a homogeneous distribution of temperature, which produced a superior surface finish. The workpiece's higher amount of iron, aluminium, and other components, along with the untreated tool, caused localised heating and increased friction. This, in turn, increased cutting force and impacted surface roughness. According to the numerical analysis, the feed rate accounted for up to 95% of the total influence and had the greatest impact on machining performance. © The Institution of Engineers (India) 2024.

关键词： Superalloys

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Analysis of automation in Foundries for Transforming Production Efficiency, Quality Control, and Operational Resilience 2

Analysis of Automation in Foundries for Transforming Product...

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2nd International Conference on Machine Learning and Autonomous Systems, ICMLAS 2025

作者： Bhagyanathan, C. Sarvesh, J. Vishal, G. Rithvik, R. Sri Ramakrishna Engineering College Department of Mechanical Engineering Coimbatore India Sri Ramakrishna Engineering College Department of Robotics and Automation Coimbatore India

ISBN: (数字)9798331505745

ISBN: (纸本)9798331505745

The foundry industry, a cornerstone of manufacturing, has undergone significant transformations due to the integration of automation technologies. This survey paper examines the evolution of automation in foundries, exploring its historical development, key adoption drivers, and the ongoing challenges faced by traditional operations. Technological advancements driving this change include the Industrial Internet of Things (IIoT), robotics, artificial intelligence (AI), machine learning (ML), and cyber-physical systems (CPS), such as digital twins. Through case studies, the paper illustrates practical implementations of these technologies, such as IoT-enabled monitoring, robotics in core making and molding, AI-driven defect detection, and CPS integration in smart foundries. The advantages of automation are emphasized, including increased productivity, improved quality control, energy efficiency, sustainability, and enhanced workplace safety. Despite these benefits, the adoption of automation faces significant hurdles, such as high initial investment costs, integration with legacy systems, skill gaps, and cybersecurity concerns. The paper also identifies future trends, including the rise of collaborative robotics (cobots), edge computing, 5G technologies, and the vision for fully autonomous foundries. This comprehensive survey offers valuable insights into the current state of foundry automation, its transformative potential, and future directions for researchers and industry stakeholders seeking to leverage these advancements for operational excellence. © 2025 IEEE.

关键词： Coremaking

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Development of a cable-driven redundant space manipulator with large bending angle by combining quaternion joints and segmented coupled linkages mechanism

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Chinese Journal of Aeronautics 2023年第11期36卷 483-499页

作者： Taiwei YANG Jian HUANG Wenfu XU Ke SHAO Bin LIANG School of Mechanical Engineering and Automation Harbin Institute of TechnologyShenzhen 518055China State Key Laboratory of Robotics and System Harbin Institute of TechnologyHarbin 150001China Department of Automation Tsinghua UniversityBeijing 100854China

A cable-driven redundant manipulator has significant potential in confined space applications, such as environmental exploration, equipment monitoring, or maintenance. A traditional design requires 3N driving motors/cables to supply 2N degrees of freedom(DOF) movement *** number of motors is 1.5 times that of the joints’ DOF, increasing the hardware cost and the complexity of the kinematics, dynamics, and control. This study develops a novel redundant space manipulator with decoupled cable-driven joints and segmented linkages. It is a 1680 mm continuum manipulator with eight DOF, consisting of four segmented linkages driven by eight motors/pairs of cables. Each segment has two equivalent DOF, which are realized by four quaternion joints synchronously driven by two linkage cables. The linkage cables of adjacent joints are symmetrically decoupled and offset at 180°. This design allows equal-angle movement of all the joints of each segment. Moreover, each decoupling driving mechanism is designed based on a pulley block composed of two fixed and movable pulleys. The two movable pulleys realize the opposite but equidistant motions of the two driving cables, i.e., pulling and loosening, assuring symmetrical movements of the two driving cables of each segment. Consequently, the equivalent 2N-DOF joints are driven only by 2N motors, significantly reducing the hardware cost and simplifying the mapping relationship between the motor angle/cable length and the joint angle. Furthermore, the bending range of each segment could reach 360°, which is three times that of a traditional design. Finally, a prototype has been developed and experimented with to verify the performance of the proposed mechanism and the corresponding algorithms.

关键词： Cable-driven Mechanism design Redundant manipulators Segmented linkages Kinematics

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