Energy harvesting from pavements and roadways: A comprehensive review of technologies, materials, and challenges

https://iopscience.iop.org/article/10.1088/1361-665X/ab192a/pdf

Delta-type four-DOF force-feedback device composed of pneumatic artificial muscles and magnetorheological clutch and its application to lid opening

A mathematical model for the magnetorheological materials and magneto reheological devices

This work presents an optimised design for a magneto rheological fluid brake for all terrain vehicles. The actuator consists of a disk which is immersed in the magneto rheological fluid surrounded by an electromagnet. The braking torque is controlled by varying the DC current applied to the electromagnet. In the presence of a magnetic field, the magneto rheological fluid particle aligns in a chain like structure, thus increasing the viscosity. The shear stress generated causes friction in the surfaces of the rotating disk. Electromagnetic analysis of the proposed system is carried out using finite element based COMSOL multi-physics software and the amount of magnetic field generated is calculated with the help of COMSOL. The geometry is optimised and performance of the system in terms of braking torque is carried out. Proposed design reveals better performance in terms of braking torque from the existing literature.

https://iopscience.iop.org/article/10.1088/1757-899X/310/1/012127/pdf

Design and analysis of magneto rheological fluid brake for an all terrain vehicle

In a virtual reality (VR) space, wearing a head-mounted display can help with the visualization of objects although users cannot experience realistic tactile sensations. Recently, several force feedback devices have been developed, including wearable devices that use straight-fiber-type pneumatic muscles and magnetorheological fluids. This allows the devices to render elastic, frictional, and viscous forces during spatially unrestricted movement. However, during friction and viscosity rendering, the elasticity of the artificial muscle is influenced by the elastic element of the muscle, preventing proper presentation of the force. Therefore, this study proposed a clutch mechanism to switch the force presentation of elastic elements by the contraction of artificial muscles. The mechanism was incorporated into a wearable four-degrees-of-freedom force feedback device, and its elastic, frictional, and viscous force feedback performances were quantitatively assessed via fundamental property experiments. Furthermore, a VR space was constructed to present the operator with force perceptions of virtual elastic, frictional, and viscous objects within that space, and the system’s performance was qualitatively assessed. The results confirmed a reduction in the effect of elastic elements and an improvement in the presentation performance. Additionally, the use of this device in the VR space was confirmed to improve the realism of virtual objects in terms of friction and viscosity.

Development of a Wearable Four-Degrees-of-Freedom Force Feedback Device with a Clutch Mechanism Using Artificial Muscle Contraction

The lack of eyesight is a severe obstacle faced by the blind and limits their access to technology Developments in assistive technology can be traced from the implementation of braille through engraving and embossing the script With the growth of digital age, braille is included in keyboards and number pads and more recently as mechanical refreshable braille displays with integrated audio systems [8] However, such systems are extremely expensive to purchase and maintain Existing displays have a very low resolution and are bulky [5] This project explores developments in ferrofluids, a type of magnetorheological liquid, and its possible applications in a magnetically controlled display layer Also, electromagnets are used instead of conventional neodymium magnets Variations in the coil shape and base shape are also explored The aim is to achieve dimensions closer to existing mechanical braille systems The models considered are analysed on COMSOL Multiphysics software [3] Considerable improvement is achieved in reducing size to improve resolution There is vast scope for further research in improving the system for commercial viability

Design and simulation of ferrofluid tactile screen for braille interface

A shock absorber design intended to replace the existing conventional shock absorber with a controllable system using a Magneto-rheological damper is introduced for an All Terrain Vehicle (ATV) that was designed for Baja SAE competitions. Suspensions are a vital part of an All Terrain Vehicles as it endures various surfaces and requires utmost attention while designing. COMSOL multi-physics software is used for applications that have coupled physics problems and is a unique tool that is used for the designing and analysis phase of the Magneto-rheological damper for the considered application and the model is optimized based on Taguchi using DOE software. The magneto-rheological damper is designed to maximize the damping force with the measured geometric constraints for the All Terrain Vehicle.

Design and analysis of a magneto-rheological damper for an all terrain vehicle

Sea Turtle Foraging and Hydrozoan Optimization Algorithm-based NLOS Node Positioning Scheme for Reliable Data Dissemination in Vehicular Ad hoc Networks

Rapid advancements in the field of embedded systems have facilitated the development of cost-effective complex projects with innovative outcomes. These advancements also apply for the automotive racing domain in the form of digital data extraction and wireless communication. It is of utmost importance to have a system in racing vehicles that will cater real-time data to the race engineers using which the process of troubleshooting the vehicle in the pit can be aided. In this manuscript, a data logging and a telemetry system for an All-Terrain Vehicle (ATV) has been developed by Team Torpedo, the ATV racing team of Amrita School of Engineering, Coimbatore. The team participates in national amateur off-road racing competitions that see an attendance of over 250 reputed college teams from different parts of the country. This system is based on a low-cost embedded platform powered by an Arduino Mega 2560 microcontroller. Important parameters like speed, G forces, GPS coordinates, etc. are logged in a microSD card which is used for validating the ATVs design and standardize its performance. During the racing events, the collected data is wirelessly transmitted to the pit using the Zigbee protocol over a reasonably large distance. In the receiver's end, the data is graphically rendered for the race engineers to assess the ATV's real-time performance.

N. Tamilarasan

Papers

Design and analysis of magneto rheological fluid brake for an all terrain vehicle

Design and simulation of ferrofluid tactile screen for braille interface

Design and analysis of a magneto-rheological damper for an all terrain vehicle

Sea Turtle Foraging and Hydrozoan Optimization Algorithm-based NLOS Node Positioning Scheme for Reliable Data Dissemination in Vehicular Ad hoc Networks

Low-cost data logging and telemetry system for All-Terrain Vehicle performance analysis