Tensile Testing Analysis of the HRB400 Steel Reinforcement Bar: Tensile Testing Analysis of the HRB400 Steel Reinforcement Bar

Many of the engineering applications have been focused on the tensile testing of steels for several reasons and wide usage. Mechanical properties of the steel play a key role for ensuring the quality of this material after the manufacturing process. One of the important tests for determination the mechanical properties of steel has been focused on the results of the tensile test. Based on it, we can have important information for selecting steel material in different engineering applications such as civil engineering for constructions application, manufacturing industries for machinery details etc. The tensile properties have been used and measured during development of new material or other processes. In our research work we have been focused on the usage of the tensile testing analysis of HRB400 Steel Reinforcement Bar. The results have shown that the production of the HRB400 steel bar fulfil the requirement of the international standard SSH EN ISO 6892-1

Proposal of a LoRaWAN-based IoT System for Food Waste Management

Waste management is one of the main concerns with our environment which impacts the health of our society. A significant amount of waste disposed by people are organic material. Kitchen wastes like food scraps disposed by families and restaurants, are becoming in large amounts and the natural capacity of the environment cannot assimilate them. Therefore, construction of waste management systems is needed. Internet of Things (IoT) and technological development can be used for different solutions in waste management. In this paper, we have proposed a low cost food waste management system, capable to convert food wastes to compost. To make the management system, safe, efficient, and less time consuming, we propose to use a LoRaWAN-based IoT approach

Autonomous Driving Vehicles and Control System Design

Autonomous driving vehicles and the control system design have been undergoing rapid changes in the last decade and affecting the concept and behaviour of human traffic. However, the control system design for autonomous driving vehicles is still a great challenge since the real vehicles are subject to enormous dynamic constraints depending on the vehicle physical limitations, environmental constraints and surrounding obstacles. This paper presents a new scheme of nonlinear model predictive control subject to softened constraints for autonomous driving vehicles. When some vehicle dynamic limitations can be converted to softened constraints, the model predictive control optimizer can be easier to find out the optimal control action. This helps to improve the system stability and the application for further intelligent control in the future. Simulation results show that the new controller can drive the vehicle tracking well on different trajectories amid dynamic constraints on states, outputs and inputs

Model Predictive Control for Autonomous Vehicle Tracking

This study develops model predictive control (MPC) schemes for controlling autonomous vehicles tracking on feasible trajectories generated from flatness or polynomial equations. All of the vehicle online moving parameters including coordinate positions, body orientation angle, and steering angle are included into the MPC optimizer for calculating the real-time optimal inputs for the vehicle linear velocity and its steering velocity to minimize the errors between the desired and the actual course of travel. The use of MPC can simplify and eliminate the complexity of controller design since MPC can work itself as a system modelling controller. MPC can also handle on-line the constraints of any variables exceeding their limits. However the high computational demands are the main challenge for this method applying for the real applications

Smart Glove for Augmented and Virtual Reality

This research work is carried out on designing and prototyping a smart glove, which can conduct 3D interaction with computer MATLAB model in real time. The smart glove is constructed with only inertial measurement units for gathering and achieving human hand movement position data. This application will support the accuracy of the device and provide additional flexibilities for human interaction with other objects. The purpose of our design is to provide a smart glove with low price (less than 100€) for researchers in different institutions to develop their research projects with virtual and augmented reality. The design of hardware and software, as well as prototyping experiments is also presented

Impact pressure on mechanical properties of aluminum based composite by ECAP-parallel channel

The pressing of equal channel angular pressing - parallel channel process has an effect on microstructure and mechanical properties of the composite materials. Finite element has been used for conducting pressure effect through parallel channel for knowing distribution effect pressing. The materials AA1070 and AA6061 powder matrix composite with Al2O3 nano fiber were used as reinforcement. Mechanical properties and scanning electron microscope were observed in room temperature pressure and in case where the temperatures were higher than recrystallization value. Both results were compared to determine the effectiveness of pressure on each process. The characterization of aluminum composites on the aspects and phenomena of the distribution of pressing effect on hot and cold conditions treasured by finite elements will be explained in this paper

Performance Evaluation Analyses of Recycled Concrete in Albania by using Ultrasonic Pulse Velocity

This paper is focused on investigation of the possibility of using recycled aggregate in concrete mixes instead of natural aggregate. Our research included the preparation of concrete mixtures with recycled aggregate of concrete and natural fine aggregate. It has been focused on evaluation of compressive strength of old and new concrete, granulometric distribution analysis of recycled concrete, density of new and old concrete, water permeability in concrete, and measuring of Ultrasonic Pulse Velocity (UPV) for our samples. According to experimental results, the use of recycled aggregate in concrete mixes as an alternative to natural aggregate is possible. The experimental results demonstrate that recycled aggregates of concrete can achieve higher durability

Calculation and Simulation of Vehicle Steering Dynamics

This paper presents fundamental mathematical estimations of vehicle sideslip in stationary conditions regarding the influences of the vehicle parameters such as the tire stiffness, position of gravity centre, vehicle speed and the turning radius. The vehicle dynamics on steady state and transient responses are also investigated to see the effects of the yaw natural frequency and yaw damping rate on the steering system. Results from this study can be used in designing an automatic control of tracking vehicle in the future