With development of science and technology, robots are used in various regions, such as car manufacturing, radars and brain surgery. It can also do dangerous jobs for people, including cleaning skyscrapers, exploring outer spaces. Moreover, they can take place of housemaid to look after us and make our life more leisurable. Since it is so widely used, high dynamic performance controller of a robot arm is eagerly wanted. The aim of this project is to control a double link robot arm, to stabilize the two links at set point rejecting disturbances and to track functions with low frequency. If double link has been studied thoroughly, it is easy to expand the results to multi-link robot arms. Our future life will be easier if we let the robot do what we aim to do!
The A8 3D Printer adopts latest motherboard, reliable MK8 extruder, high-precision T-shaped lead screw, premium electric motor, which can be used in areas like architecture, children's toy, medical application, art and culture, DIY and so on. Video Demo 2004 LCD Display Screen There are five buttons to operate, which is easy to control. Also the 3D printer can be used for off-line printing. Special Designed MK8 Extrusion Head Full metal extrusion head, which is hard to be blocked. Thanks to the great processing technic, the printing lines come out of the extrusion head are meticulous. High-Precision T-Shaped Lead Screw Adapts the stainless steel, which is guaranteed to be of premium quality. Latest Motherboard Adapts the latest motherboard, which means the 3D printer comes with more functions. Also it is easier for users to operate. High Quality Power with a power of 180W and 110-240V wide working range, the power can provide good power resource and safe protection for the users. Specifications Model A8 Screen 2004 Frame Material Acrylic Printing Size 220 x 220 x 240 mm Printing Speed 100mm/s Nozzle Diameter 0.4mm Precision Accuracy of Seam Thickness 0.1-0.3 mm Precision Accuracy of XY Positioning 0.012 mm Precision Accuracy of Z Positioning 0.004mm Working Condition Temperature: 10-30℃, Humidity: 20-50% Printing Material Diameter 1.75mm Material Types ABS, PLA, TPU, Wood, Nylon, PVA, PP, Luminescent Operation System XP/Win7/Win8/Mac/Linux Supporting Software Cura/Repetier-host Document Type STL/OBJ/G-code Offline Printing Support Product Weight 8.5kg Package Weight 9.5kg Product Size 510 x 400 x 415 mm Package Size 520 x 350 x 220 mm Package Contents 1 x A8 Large Desktop 3D Printer Kit Instruction Step Video
The term automation has many definitions. Apparently, it was first used in the early 1950s to mean automatic handling of materials, particularly equipment used to unload and load stamping equipment. It has now become a general term referring to services performed, products manufactured and inspected, information handling, materials handling, and assembly—all done automatically (i.e.as an automatic operation without human involvement). At present, in order to solve the low efficiency and high cost problem in the process of CNC machines, Nowadays Manufacturers have always faced the challenge of constantly needing to find new ways to reduce the cost of their loading and unloading processes in machining centers. The project title is “LOW COST AUTOMATION FOR MACHINING CENTER” new concept in Machine tool industry for continuous production, less cycle time and more accuracy. This project contains the auto loading plate, unloading plate, hydraulic fixture and rotary table controlling with PLC Ladder logic controller.It is a simple automation system for auto load and unload component to vertical CNC Machining center as compared to the gantry auto load and unload system.
The purpose of HVAC system is to provide and maintain a desired indoor thermal comfort. HVAC system inherents nonlinearity of the large scale system including pure lag time, big thermal inertia, uncertain disturbance factors and constraints which lead to inability to efficiently control this system. Furthermore, there is no combined model developed for the comprehensive HVAC system. This book addresses these issues by proposing a hybrid model combining building structure with the equipments of HVAC system in one model. The hybrid identification of physical and empirical methods is explained where empirical Residential Load Factor is used to calculate a buildings load. The indoor thermal sensation identification is using a TS fuzzy model based on PMV and tuned by Gauss-Newton Method. To control such sophisticated system, a new online-tuned TS Fuzzy Forward controller is proposed. This algorithm manipulates inputs of AHU based on optimization of inputs of PMV sensor. An important finding in this book is the conversion of a fuzzy inference system for PMV and control model into memory layers parameters. This approach is computationally faster and efficient than traditional methods.
The security is an important aspect in our daily life whichever the system is considered, security plays vital role. The biometric person identification technique based on the pattern of human iris is suitable to be applied to access control and provides strong e-security. Iris recognition is one of important biometric recognition approaches in human identification is very active topic in research and practical application. Iris Recognition System consists of Acquisition, Localization, Feature Extraction and Feature Matching phases. Circular Hough Transform is one the best suitable algorithm in segmentation phase, but as a result of having two for-loops in its structure; CHT algorithm consumes high time processing and uses high storage capacity. These drawbacks make it hardly appropriate for real time applications of iris recognition system. To improve time and storage complexity, firstly, a pre-processing of CUHK iris image dataset is done to eliminate unnecessarily regions and secondly, a radius table is created based on pupil size variation of CUHK iris image dataset. The results show at least 40% efficiency in time complexity and minimum 20% efficiency in storage complexity.
High efficiency of power converters placed between alternative energy sources and the utility grid is required to maximize the utilization of these sources. Power quality is another aspect that requires large passive elements to be placed between these sources and the grid. This book, therefore, provides the different modern technologies for energy efficiency improvement and develops a higher-level high frequency power converter system (HFPCS) that optimizes the use of hybrid renewable power injected into power grid. HFPCS provides high efficiency, reduced size of passive components, higher levels of power density realization, lower harmonic distortion, higher reliability, and lower cost. Dynamic modeling for each part is developed, simulated and tested. Steady-state performance with battery storage is analyzed. Various types of algorithms are developed and tested to verify the effectiveness of the power conversion topologies. The developed HFPCS is compared experimentally with other currently available power converters. HFPCS is also employed inside a microgrid system infrastructure, connecting it to power grid to verify its power transfer capabilities and grid connectivity.
The aim of this work is to investigate the possibility to form high resolution Synthetic Aperture Radar (SAR) images using the Global Navigation Satellite System (GNSS) Galileo, GPS and Glonas, In particular the thesis study the GPS signal and evaluate its properties for bistatic case. The report is based on the fact that Galileo and GPS are both positioning systems with similar characteristics. The difference is mainly that Galileo System uses a larger number of satellites and a different modulation scheme to improve the efficiency of the system, resulting in a better accuracy. On the topic of GNSS SAR, the report will be described with modes, resolution, geometry and algorithms. It is also explained the Space Surface Bi-static Radar and within two particular cases: parallel and non parallel paths
Interest in power harvesting for Radio Frequency Identification Tag (RFID) application has been rapidly growing. Currently the major challenge is to reduce the cost, decrease the size, and improve the efficiency and the sensitivity of the low power harvesting devices. This monograph presents a high efficiency RF to DC converter. The technique exploits an internal Vth cancellation along with a leakage current reducer. The work demonstrates methods to reduce the threshold voltage of a transistor and reducing its leakage current. It further discusses techniques to reduce sub-threshold leakage current and enhance the power conversion efficiency.