11 research outputs found
Simulation of three-phase induction motor drives using indirect field oriented control in PSIM environment
No full textSpeed Performance Improvement Of Three-Phase Induction Motor Drives Using Adaptive Sliding Mode Controller
No full textThe induction motor is widely used in industrial applications. The most type of induction motor used in the industrial applications is three-phase squirrel cage AC induction motor. Several industrial applications use the induction motor because of its ruggedness, reliability and relatively low cost. However, more complexity control scheme is required for the induction motor because it is highly non-linear in a dynamic structure. In addition, the rotor currents and flux-linkage of induction motor also cannot be directly measured. The modified classical sliding mode control (SMC) algorithm is developed based on the conventional robust controller with the adaption of switching gain and discontinuous sigmoid functions to eliminate the undesirable chattering phenomenon. The main focus of this research is to design a sliding mode control strategy that provides speed performance improvement of delay time (td), rise time (tr), peak time (tp), maximum % overshoot (Mp), settling time (ts) and steady-state error (ess) for the three-phase induction motor drives. More specifically, research objectives are to design a sliding mode controller by using an adaptive control strategy and compare with conventional SMC and PI speed controller. Then, the developed speed controller is implemented in an experimental rig based on indirect field-oriented control (IFOC) by using the digital signal processor (DSP) to achieve high performance control characteristics in controlling torque and rotor flux effectively. The PI or PID controllers are tuned to improve speed control issues of AC induction motor due to load variations and changes in parameters. However, the conventional strategy of the PI controller is realized cannot achieve better performance when the input of load variations are applied. Specifically, the algorithm to overcome these issues is proposed by using an ASMC and the speed control performances are tested in simulation by using PSIM software. Practically, the experimental works on hardware rigs are based on high voltage digital motor control (HVDMC) with power factor correction (PFC) from Texas Instruments (TI) that attached with the floating-point of TMS320F28335 DSP to analyze and validate the performance of an ASMC control algorithm. Moreover, the features of an ASMC are compared with conventional SMC and PI controller to improve the performance of an ASMC control algorithm. As a result, highperformance control of AC induction motor is achieved for different speed commands and loaded conditions as compared to conventional controllers. Technically, simulated results at 1400rpm with no-load conditions of maximum % overshoot (ASMC, Mp=14.4%), (SMC, Mp=24.42%), (PI, Mp=30.41%) and steady-state error (ASMC, ess=1.76rpm), (SMC, ess=6.02rpm), (SMC, ess=2.23rpm) are clearly summarized the ASMC is more superior performances compared with differences speed controllers of SMC and PI respectively. Supremely, experimental results for the ASMC at 1400rpm with no-load conditions of maximum % overshoot (Mp=0.28%) and steady-state error (ess=3.21rpm) are achieved comprehensive performances. Apart from this, the benefit of this research work is importantly desired for the non-linear of the AC motor to achieved dynamic performances such as fast response and also practically used at variable speed conditions
Comparison Performances of Indirect Field Oriented Control for Three-Phase Induction Motor Drives
No full textThis paper presents the comparative performances of Indirect Field Oriented Control (IFOC) for the three-phase induction motor. Recently, the interest of widely used the induction motor at industries because of reliability, ruggedness and almost free in maintenance. Thus, the IFOC scheme is employed to control the speed of induction motor. Therefore, P and PI controllers based on IFOC approach are analyzed at differences speed commands with no load condition. On the other hand, the PI controller is tuned based on Ziegler-Nichols method by using PSIM software which is user-friendly for simulations, design and analysis of motor drive, control loop and the power converter in power electronics studies. Subsequently, the simulated of P controller results are compared with the simulated of PI controller results at difference speed commands with no load condition. Finally, the simulated results of speed controllers are compared with the experimental results in order to explore the performances of speed responses by using IFOC scheme for three-phase induction motor drives
Comparison Performance Of Indirect Field Oriented Control For Three-Phase Induction Motor Drive
No full textThis paper presents the comparative performances of Indirect Field Oriented Control (IFOC) for the three-phase induction motor. Recently, the interest of widely used the induction motor at industries because of reliability, ruggedness and almost free in maintenance. Thus, the IFOC scheme is employed to control the speed of induction motor. Therefore, P and PI controllers based on IFOC approach are analyzed at differences speed commands with no load condition. On the other hand, the PI controller is tuned based on Ziegler-Nichols method by using PSIM software which is user-friendly for simulations, design and analysis of motor drive, control loop and the power converter in power electronics studies. Subsequently, the simulated of P controller results are compared with the simulated of PI controller results at difference speed commands with no load condition. Finally, the simulated results of speed controllers are compared with the experimental results in order to explore the performances of speed responses by using IFOC scheme for three-phase induction motor drives
Development of IT Asset Management System Application
No full textThis project is aimed at developing a desktop-based application named IT Asset
Management System (ITAMS) for managing the inventory system of any organization.
The ITAMS refers to the system and processes to manage the stock of organization with
the involvement of Technology system. This system can be used to store the details of the
inventory, stock maintenance, update the inventory based on the sales details, generate
sales and inventory report daily or weekly based. This project is categorized individual
aspects for the sales and inventory management system. In this system we are solving
different problem affecting to direct sales management and purchase management.
Inventory Management System is important to ensure quality control in businesses that
handle transactions resolving around consumer goods. Without proper inventory
control, a large retail store may runout of stock on an important item. A good inventory
management system will alert the wholesaler when it is time to record. ITAMS is also on
important means of automatically tracking large shipment. An automated helps to
minimize the errors while recording the stock. (Abstract by author
Nursing home facilities in Malaysia (premise, shared facilities & individual accommodation: Space requirement): A literature review
No full textCultural imageability on urban identity: a systematic literature review
No full textPurpose - The relationship between cultural imageability and urban identity is examined in this systematic
literature review based on several themes, highlighting the influence of cultural factors on how urban places
are perceived and represented. This systematic literature review aims to provide insights for researchers in
the fields of urban studies and landscape architecture, as well as architecture, in understanding the various
ways that cultural imageability influences the development of urban identity.
Methodology - In order to thoroughly synthesize research, the author used a systematic literature review
(SLR) technique. A total of 27 articles were found in the first step, and a final sample of 10 research studies
was synthesized.
Findings – The findings showcased the impact of culturally integrated elements and spaces on how urban
areas are seen and portrayed, emphasizing the city's ability to elicit feelings and connections that are
ingrained with its residents' cultural identities.
Limitations – The author encounters obstacles regarding the current protocols for conducting SLR that
provide little direction in the context of the built environment. The optimal decisions regarding which steps
to take in the SLR process often remain unclear, which may have an impact on the comprehensiveness of
this systematic literature review.
Originality - This SLR addresses a subject that is becoming an important topic in urban studies and
environmental psychology by concentrating on the relationship between cultural imageability and urban
identity using SLR as the methodology
Ömer Bin Mustafa’nın Risâle fî avâid ıraâti’l-urân adlı eserinin Tahkîk ve Tahlîli
No full textBu çalışmada on yedinci yüzyılda yaşadığı düşünülen Kefeli Ömer bin Mustafa’nın Risâle fî ?avâ?id ?ıra?âti’l-?ur?ân adlı eseri çeviri yazıya aktarılarak incelenmiştir. Üç ana bölümden oluşan bu tezin giriş bölümünde çalışmanın amacı, önemi, yöntemi ve konusu ele alınmaktadır. Bununla birlikte eserin müellife aidiyeti sorunu gündeme getirilmiş ve bir takım tespitlerde bulunulmuştur. Ayrıca eserin biçim tanıtımı yapılmış, transkripsiyon ve incelenmesinde takip edilen yöntemlerin sınırları çizilmiştir. Birinci bölümde müellif Ömer bin Mustafa ve müstensih Çorumlu Hacı Ömer b. Ahmed b. Muhammed b. Mustafa’nın hayatı, müellifin eseri yazma amacı ve Resm-i Mushaf imlâsı noktasındaki hassasiyetine değinilmiştir. İkinci bölümde Resm-i Osmânî imlâsına ait hazif, ziyâde, maktû?, mevsûl gibi bazı konuların incelemesi yapılmış ve bu konulara dair verilen örnekler tablolar halinde dizayn edilmiştir. Bununla birlikte Kur?ânda yer alan lafz-ı müşâbih âyetler ele alınmış, ayrıca Hafs rivâyetine göre bazı tecvid konularına da yer verilmiştir. Üçüncü bölüm ise risâlenin tam transkripsiyonlu metnine ayrılmış önemli görülen yerlerin açıklaması dipnotlarda belirtilmiştir. Çalışma esnasında ulaşılan bilgiler ‘Sonuç’ bölümünde değerlendirilirken çalışmada istifade edilen eserler ‘Kaynakça’ bölümünde sunulmuştur. Ömer Bin Mustafa’nın Risâle fî ?avâ?id ?ıra?âti’l-?ur?ân Adlı Eserinin Tahkîk ve Tahlîli başlıklı bu çalışmanın Resm-i Osmânî imlâsı tarihindeki yerini alması ve alana katkı sağlaması amaçlanmaktadır.In this study, the work called Risâle fî ?avâ?id ?ıra'âti'l-?ur'ân of Kefeli Ömer bin Mustafa, who is thought to have lived in the seventeenth century, has been analyzed by translating it into text. In the introduction part of this thesis, which consists of three main parts, the aim, importance, method and subject of the study are discussed. In addition to this, the problem of belonging to the author of the work has been brought to the agenda and some determinations have been made. In addition, the format of the work was introduced, and the boundaries of the methods followed in transcription and analysis were drawn. In the first part, the author Ömer bin Mustafa and the copyist Hacı Ömer b. Ahmed b. Muhammed b. Mustafa's life, the author's purpose of writing the work and his sensitivity about the spelling of the Official Mushaf are mentioned. In the second part, some subjects such as hasif, ziyâde, maktû?, mawsûl belonging to the official Ottoman spelling were examined and the examples given on these subjects were designed in tables. In addition to this, the literal mushabih verses in the Qur'an are discussed, and some tajwid issues are also included according to the Hafs narration. The third section is devoted to the fully transcripted text of the treatise, and the explanations of the important places are indicated in the footnotes. While the information obtained during the study is evaluated in the 'Conclusion' section, the works benefited from in the study are presented in the 'References' section. It is aimed to take its place in the history of Official Osmani orthography and to contribute to the field of this study, titled "Takîk and Analysis" of Ömer Bin Mustafa's Risâle fî ?avâ?id ?ıra?âti'l-?ur?ân
