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The acquisition and processing of EEG and sEMG is an important task in the field of biomechanics. In order to collect bioelectrical signals, new design method of high gain antenna has become a hot topic. This paper proposes a design method of dual-frequency high-gain antenna based on quasi-continuous meta surface. By adding meta surfaces or adding slots to form quasi-continuous meta surfaces to replace the original patch radiating elements, the antenna performance is improved, and new ideas are provided for the realization of high-performance antennas. Based on the theoretical basis of the meta surface to increase the antenna gain, the quasi-continuous meta surface is loaded on the basis of the dual-frequency antenna, which improves the impedance matching of the dual-frequency antenna and at the same time increases the a..... ReadMore

Renewable energy sources especially wind energy have gained much attention due to the recent energy crisis and the desire to obtain clean energy. Due to vibration, small wind turbines are usually not installed on the structures since the vibration of a wind turbine tower can attain resonance. Resonance is often a contributing factor to many of the vibration problems that occur in wind turbine tower. Small wind turbine exists on National Centre for Energy and Environment, University of Benin with power of 1.0 kW, which creates more vibration on running condition. By reducing vibration in the wind turbine, vibration transformation on the structure will also be avoided so that we can improve performance, lifetime and power quality of wind turbine. Vibration analysis on the small wind turbine model was carried out by perfor..... ReadMore

The domain of Flexible Robotics is one of the niche ensembles of present-day robotics research that caters for real-time aspects like rheology, vibration, sensor fusion & non-linear coupled dynamics for control. As some of these features are inherent in a flexible robot, prototyping the same having multiple degrees-of-freedom is highly challenging. This paper reports salient design issues for the firmware of a novel higher-order serial-chain flexible robot and focuses on depth over the hardware development of a prototype multi-link serial-chain direct drive flexible robot fitted with a miniature sensor-instrumented gripper at the free end. The paper also dwells on a new analysis in order to capture the real-time rheology & vibration tuple of the fabricated flexible robot, aided by a novel scheme for sensory layout for its real-time actuat..... ReadMore

This paper designed and developed an underwater robot for radioactive material cleaning and other operations, instead of manual methods. Since radioactive substances exist in a pressure vessel, the interior of which is filled with water, and the working environment of the robot is underwater. Its working method is as follows: the inner wall of the pressure volume is cleaned by the cleaning and grinding tools mounted on both sides of the fuselage, and the radioactive material dropped from the bottom of the pressure vessel is cleaned by the robotic arm mounted on the bottom of robot. At the same time, sensors such as cameras, thermometers, and sonars mounted on the robot can return video images and information data inside the pressure vessel. Under the nuclear environment, the underwater r..... ReadMore

Ductility is a measure of a metal’s ability to withstand tensile stress, which is a force pulling the two ends of an object away from each other. Ductility is a measure of a metal’s ability to withstand tensile stress, which is a force pulling the two ends of an object away from each other (Source; Wikipedia). There are two methods to measure ductility. One is elongation (strain); the second is reduction of area ( ) dA dt . Van Vlack states that there is no mathematical relationship between the two measures of ductility. In this paper, we will unite the two mathematically. Assume a specimen that is circular in cross-section...... ReadMore

Half of all the fruit and vegetables produced worldwide are lost or wasted, representing 1.3 billion tons annually [1]. Fruit processing is becoming necessary to avoid its spoilage. Food dehydration is a common food conservation practice for increasing fruit shelf life. This technique maintains product sensorial attributes and can be easily transported worldwide after proper packing [2]. Drying removes free water from food reducing microbial spoilage and enzymatic reactions [3]. Food drying has been extensively studied in the last years trying to obtain high drying rates while maintaining product quality [4]. Energy consumption during drying has to be optimized, meanwhile fruit texture, flavor and chemical components persist [5]. Drying consumes 10-15% of the total industrial energy demand in Canada, France, and the USA [6]. Solar and h..... ReadMore

Design modulation and customization of robotic grippers are gaining popularity in global perspective due to its effectiveness in a variety of end-applications. However, in many of the new designs prototyping poses considerable challenge because of the external envelope of the gripper and its self-weight. The objective of the present research is to reduce the tare-weight of a novel curvilinearjaw robotic gripper keeping the strength unaffected by imbibing topology optimization niche. In fact, any new engineering component / system will be rather bulky until the optimization is performed on that entity. More weight means additional cost of manufacturing for no motive. Although strong and light-weight design of a robotic sub-system in static condition can be satisfactorily obtained by optimization practices, designing an optimal robotic comp..... ReadMore

Study on Flexible Robotic System (FRS) is one of the distinguishing domains of modern-age robotics research that deals with various challenging issues like tackling slenderness of the mechanical sub-assemblies and harnessing real-time vibration, inherent in the system. This vibration is completely built-in type and thus it is design invariant. By nature, vibration in FRS is selfpropagating and does not follow rule-based analytical modelling in real-time applications. This inherent vibration is totally selfgenerating, structure independent and can be classified mainly in two ways, namely: Modal frequency and Eigen value. A sizeable amount of basic research, case studies and design attempts with hardware implementations took place in the past to overcome this vibration in FRS. But most of those attempts were unsuccessful because of its inco..... ReadMore