American Journal of Scientific Research and Essays

Implementation of IFOC Algorithm for a Three-Phase Induction Motor Embedded on DSP Microcontroller

Research article of American Journal of Scientific Research and Essays Implementation of IFOC Algorithm for a Three-Phase Induction Motor Embedded on DSP Microcontroller Denis Carlini Alexandre, Alexandre Simiao Caporali and Cesar da Costa IFSP Institute Federal of São Paulo, São Paulo, Brasil. Asynchronous machines are well known to have natural limitations because of the highly nonlinearity and complexity of their motor models. To resolve these problems, an indirect field-oriented control (IFOC) algorithm is applied to control the instantaneous electrical quantities such as torque and flux component. Medium-voltage drives are generally based on either voltage-source inverter (VSI) or current-source inverter (CSI). This paper presents a high-performance CSI-fed IFOC method. By the decoupled control of the machine flux and torque, the performance of the conventional direct field-oriented control (DFOC) CSI-fed induction motor drives has improved; however, this scheme presents a low dynamic response and machine parameter dependence. A squirrel-cage induction motor drive system that provides the proposed IFOC algorithm is tested. The IFOC algorithm has a good dynamic performance and stability. Graphs with measured and estimated values of torque and speed are presented. The results demonstrate the efficiency of the proposed torque control embedded on a digital signal processor (DSP) microcontroller. Keywords:  IFOC algorithm, Embedded system, Three-phase induction motor, Torque control ...

Design and adaptive control of omni-directional mobile platform with four driving wheels

Research article of American Journal of Scientific Research and Essays Design and adaptive control of omni-directional mobile platform with four driving wheels Weibin Zhang School of Mechanical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, P.R. China In this paper, a general kinematic model of the four drive wheel omnidirectional mobile platform is established, and the CMAC (Cerebellar model articulation controller) +PID joint control strategy is used to design the embedded adaptive control of the omnidirectional mobile platform in view of the problem that the conventional control can not be self-tuning online and the real-time response of the response needs to be improved. The MATLAB simulation and experimental analysis of DC motor speed regulation were carried out, and the motion performance of the prototype was tested by a series of typical experiments. The results show that the kinematic model of the mecanum wheel omnidirectional moving platform is reasonable. The dynamic response of the CMAC+PID adaptive controller is fast, the control precision is high, and the robustness is good. The prototype can achieve the horizontal / vertical translation, the original rotation and the omni-directional motion in the plane. The overall performance can meet the requirements of the engineering application. Keywords:  mecanum wheel; omni-directional movement platform; kinematics analysis; CMAC+PID controller ...

The Importance of Dental Activity in Patients Inside in Intensive Therapy Unit

Review article of American Journal of Scientific Research and Essays The Importance of Dental Activity in Patients Inside in Intensive Therapy Unit Santos, G.A.1; Lucas Ramos, V.S.2; Santana, J.F.3; Lima, L.F.A.4; França, L.C.5; Maia, C.S. 6 1,2,3,4,5 Student of the Dentistry Course - UFPE; 6Docente / researcher of the Department of Embryology and Histology of UFPE. Introduction: Poor oral hygiene is common in ICU patients, which leads to colonization of the oral biofilm by pathogenic microorganisms, especially respiratory pathogens, which may be a source of nosocomial infection. Once the bacteria present in the mouth can be aspirated and cause aspiration pneumonia. Objective: Review of the literature regarding the importance of dental intervention in patients hospitalized in intensive care units. Methodology: An integrative review was carried out in the LILACS databases and in the SCIELO Virtual Library, using the descriptors: Dental care, Periodontal diseases and ICU. Inclusion criteria were: full-text articles available in Portuguese or English and with a temporal cut between 2013 and 2017. Results: Three articles were selected to meet the criteria for inclusion. Discussion: The oral cavity is the first portal of entry for respiratory pathogenic organisms that cause systemic infections, with pneumonia being one of them. Aspiration pneumonia is the most common type of nosocomial or hospital pneumonia and is an infection of the pulmonary parenchyma caused by different types of etiological agents including bacteria, fungi and viruses. This disease is of high cost and represents a significant cause of morbidity and mortality, diagnosed 48 hours after the patient’s hospitalization in the ICU. The absence of attention with oral hygiene and the reduction of salivary flow results in an increase in the quantity and complexity of dental plaque, which may favor bacterial interaction between native plaque bacteria and respiratory pathogens such as P. aeruginosa and enteric bacilli. Conclusion: ...

Clinical Conduct for a Bruxist Patient: Clinical Case Report

Review article of American Journal of Scientific Research and Essays Clinical Conduct for a Bruxist Patient: Clinical Case Report Araújo S.S.1; Trindade M.O.2; Arruda F.E.P.3; Fernandes G.A.4 1,3,4 Estudante do Curso de Odontologia – UFPE; 2Docente do Departamento de Prótese e Cirurgia Buco Facial – UFPE Introduction: Sleep bruxism is an activity of stereotyped movements promoted by the subconscious in the masticatory system that includes the functions of clenching and / or grinding, where neuromuscular protection mechanisms are absent, which can lead to damages to the masticatory system and temporomandibular disorders. Aim: This article aims to demonstrate conducts used in a clinical case to assist in similar case planning. Case report: A 58-year-old male patient required an appointment at the Federal University of Pernambuco integrated dentistry clinic, presenting a complaint of pain in the face region and lack of adaptation with prostheses, he had posterior maxillary edentulism, loss of vertical dimension and severe wear on the remaining teeth. The anamnesis was made in his initial clinical examination, later, was prepared the diagnostic wax-up, the waxing was moulded with condensation silicone for restoration in composite resin with prefabricated pins. Afterward the molding were made to prepare removable partial dentures for the patient. In the old prostheses overlays were prepared to slide between them forming a type of plaque, reprogramming the jaw and avoiding that the patient destroyed the already made restorations. In the following session, the well-adapted prostheses were delivered and the occlusal adjustment was properly performed with intraoral test. Results: The patient reported aesthetic improvement, total pain reduction and better adaptation with the prostheses, he also related comfort in using them. Conclusion: It is possible to perform the rehabilitation of partial edentulous bruxers, approximating the patient to his or her centric relation, without the necessity of plaques and maintaining a quality ...

Prof. Dr. Mohammad Mehdi Rashidi
Shanghai Key Lab of Vehicle Aerodynamics and Vehicle Thermal Management, Systems, Tongji Clean Energy Institute of advanced studies- Tongji University.

Dr. Milena Palczewska
Vice Dean for student affairs, Military Faculty, War Studies University, al. gen. Antoniego Chruściela “Montera” 10300-910 Warszawa

Dr. Piyush Chaudhary
Assistant Professor, Deptt of Ras Shastra (Ayurvedic Pharmaceutics), Incharge, Gurukul Pharmacy, MSM Institute of Ayurveda, BPS Women University, Khanpur Kalan, Sonepat, Haryana

Dr. M. M. Awad
Mechanical Power Engineering Department, Faculty of Engineering, Mansoura University, Mansoura, Egypt

Dr.Eng. Ahmed Kadhim Hussein
College of Engineering, Department of Mechanical Engineering, Babylon University, Babylon City, HIILA , IRAQ

Dr. KATSURA Hidemitsu 
Guest Lecturer for ICEEE-2016, Coimbatore Institute of Technology (CIT) in COIMBATORE, TAMIL NADU 641014, INDIA

Dr. Sang-Bing Tsai
Prof., School of Business, Dalian University of Technology, Panjin, 124221, China; Prof., Zhongshan Institute, University of Electronic Science and Technology of China; Prof., TEDA College, Nankai University, China

Dr. Deepmala 
Visiting Scientist, SQC & OR Unit, Indian Statistical Institute

Dr. Begum Sertyesilisik
Assoc. Prof. at the Istanbul Technical University

Dr. Palani Elumalai
National Research Foundation Fellow of Korea, Department of Chemistry & Biology, University of Ulsan

Dr. Shittu Lukeman Adelaja Joseph

Prof. Dr. Naqib Ullah Khan
Department of Plant Breeding and Genetics, The University of Agriculture, Peshawar 25130, Khyber Pakhtunkhwa, PAKISTAN.

Dr. V. Ananthaswamy
Assistant Professor, The Madura College (Autonomous), Madurai – 625 011, Tamil Nadu, India.

Prof. Dr. M.Nageeb Rashed
Professor of Analytical and Environmental Chemistry, Faculty of Science, Aswan University, Egypt

Dr. Hossein Kazemian
Faculty& Director; Northern Analytical Lab Services (NALS), University of Northern British Columbia (UNBC), 3333 University Way, Prince George, BC, Canada, V2N 4Z9

Dr. Vishnu Narayan Mishra
Applied Mathematics and Humanities Department, Sardar Vallabhbhai National Institute of Technology.

Dr. Balaram Kundu
Associate Professor, Department of Mechanical Engineering, Jadavpur University, Kolkata – 700 032, INDIA

Dr. Sergio Nardini
Associate Professor, Dipartimento di Ingegneria Industriale e dell’Informazione, Seconda Università degli Studi di Napoli, via Roma 29, 81031 Aversa (CE)

Dr. Sanjay Mishra
Professor, Department of Biotechnology, School of Engineering & Technology, IFTM University

Dr. Lakshmi Narayan Mishra
Professor, Department of Mathematics, National Institute of Technology

Dept.of Mathematics, Assistant Professor In Mathematics, Govt. Degree & PG College

Dr. S. Krishna Murthy
Associate Professor, Department of Applied Mathematics,Defence Institute of Advanced Technology, Deemed University(DU), Girinagar, Pune

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1. Shuo Zhang. Experimental study on scouring of coarse sand and fine sand seabed caused by propeller washing in front of solid wharf.American Journal of Scientific Research and Essays, 2018 3:14. DOI:10.28933/ajsre-2018-12-1805 
2.Zhang Bo and Xie Xionggang. Numerical simulation and analysis of coupled Thermal-Hydrological-Mechanical in coalbed methane heating mining. American Journal of Scientific Research and Essays, 2018 3:13. DOI:10.28933/ajsre-2018-12-0808 

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