Nowadays, many robots are being used in industries, homes, military applications, disaster management, etc. worldwide. The advancements in robotics have made lives easier for humans in many aspects, and it provides a safer and more efficient. People's concerns about secure and frictionless home delivery services have grown due to the present coronavirus scenario around the world. During the tremendous strain on healthcare and hygiene, we have proposed a prototype robot that can be very useful in reducing the danger of infectious disease transmission in the product distribution system. Designing and developing a low-cost autonomous four-wheel portable drive robot prototype that can safely transport packages to a designated location utilizing a Bluetooth module and mobile application have been shown. After the robot reaches at its point of disembarkation, it waits for the customer to unlock the container. The customer will get an otp as a password to open the container and retrieve the ordered product upon delivery. This password in the form of an otp is sent to the customer with the confirmation message from the order. After completing the delivery, the robot will arrive to point of disembarkation on its own. In addition to ensuring infection safe delivery of products, our robot can be an effective technological solution that significantly reduces delivery costs.
The robot is being used in many applications for a different domain. The delivery robot was developed, and the battery was placed for the power source. Considering the abnormal condition/situation during the disaster period, energy is a critical issue for the robot. To overcome this condition, three kinds of power sources were identified such as (i) direct energy, (ii) solar energy and (iii) flywheel storage energy. All three power systems were designed and found that the delivery robot can be operated without any interruption with these power sources. The Flywheel energy storage system was fabricated and tested with the delivery robot. With these identified energy sources, it is possible to operate the delivery robot without any external supply. It can help in any disaster situation to do services to people using the delivery robot.
Correction NoticeIn Section II: CFD Modeling, the following additional clarification is provided on the differen ces between the grids that were investigated:A more detailed analysis of the grid distribution is provided in Figure A below using a histogram of cells within a specified distance from the model. The bin widths grow geometrically away from the wall and representative turbulent boundary layer wall units (y+) are specified as a reference. This reference is not representative for the region near the slat where the boundary layer is thinner. The bins are colored by the cell aspect ratio defined as the ratio of the maximum edge length to the minimum edge length. For the JAXA and ANSA grids, the cells to the right of the step change at about 2% chord are predominantly hexes or prisms. These images show that about 30% of the cells are within an inner spacing of about 30 and about 75% of the cells are within 5% of the mean aerodynamic chord of the model. In Section III: Result Comparison, the following statements are added to clarify the different pseudo -solution attractors observed across the different solutions. Figure B depicts the slat bracket that originates the flow separation as a function of angle of attack and lift coefficient. Where different turbulence models or different solvers showed similar lift coefficients and separation patterns, the indication is only listed once. This image confirms that there is strong similarity in the solutions until beyond 15°, including showing a separation from the outboard slat bracket even though no separation was detected in the experimental oil flow. As would be expected at the higher angles of attack, increased number of separations leads to decreased lift coefficient. With each grid, the separations appear in the same sequence with decreasing lift coefficient. While the outboard two slat rackets separate first in the ANSA grid, the 6th and 8th slat brackets are first to separate for the JAXA grid. Consistent with the association of pseudo -solution attractors and flow separation patterns, clusters of the same slat bracket separations are observed.The discussion of the differences between the different solutions and the DDES results in comparison to experimental pressure measurements are further substantiated in Figure C. The authors appreciate the assistance of Brian Edge from Metacomp in improving the convergence of CFD++ on several of the simulations.
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