1,721,022 research outputs found
SISTEM KONTROL INVERTED PENDULUM PADA BALANCING MOBILE ROBOT
No full textABSTRAK
Sistem kontrol merupakan suatu sistem yang menjadi pusat perhatian di bidang robotika. Dimana dengan adanya sistem kontrol ini, robot bisa menjadi lebih cerdas dan canggih. Pada proyek akhir ini akan dibangun sebuah sistem kontrol inverted pendulum pada mobile robot. Inverted pendulum adalah pendulum yang mempunyai titik berat diatas titik tumpunya. Balancing Robot ini selalu menyetimbangkan sistemnya agar pendulum tetap tegak. Sebagai deteksi kemiringan antara robot dengan lantai digunakan sensor Sharp GP2D12. Sensor ini mempunyai output tegangan analog. Data dari sensor ini akan diolah oleh Mikrokontroler ATMega 16. Karena data yang dibawa oleh Sharp GP2D12 ini mempunyai noise, maka data harus difilter. Filter yang dipakai adalah Single Exponential Filter yang bisa mereduksi noise secara optimal disamping juga mempunyai respon waktu yang cepat. Setelah selesai pemrosesan, data diolah dengan menggunakan kontrol PID. Dengan sistem kontrol ini, robot akan bergerak maju mundur searah dengan arah gerak jatuhnya pendulum. Prosentase keberhasilan kontrol PID pada robot ini adalah 90% dengan robot tidak pernah jatuh tetapi berosilasi kecil.
Kata Kunci : Inverted Pendulum, Sharp GP2D12, Single Exponential Filter, PID, Balancing Robot
Bank-to-Turn Optimal Guidance with Linear-Exponential-Gaussian Performance Index and Constant Acceleration Bias
No full textGoing Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Direct Grid-Connected Excited Synchronous Wind Power System with Auto Parameter Calibration
No full textThis thesis proposes the direct grid-connected excited synchronous wind power system by using traditional excited synchronous generator connected to a servo motor in coaxial framework. Because the excited synchronous generator doesn\ue2t need power converter, it can operate in high voltage and reliability can be improved.
The servo motor adjusted the frequency and the phase of the generator output to achieve the condition of grid connection, correcting the power factor during grid connected. However, the servo motor hardly consumes power. When grid is connected, the servo motor offers power to promote generator output. Besides, this thesis proposes auto parameter calibration, correcting parameter by the firmware, eliminating the unnecessary procedure. Through the control strategy, the system can convert the wind power to electrical power efficiently
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Develop a Real-time Supervisory Human-machine Interface with Grid-Connected Excited Synchronous Wind Power system
No full textThis thesis designs and implements a human-machine interface that can monitor the excited synchronous wind power system by Universal Asynchronous Receiver/ Transmitter(UART). The human-machine interface was developed by programming language of Visual C#. As to the communication parts, the serial port is RS232 and the object of communication is Microcontroller Unit (MCU) F28069 which is the control core of the wind power system. In order to improve the reliability of data, we also design programming package to communicate efficiently.
There are six pages of table and an operational area in the main form of this human-machine interface, The six pages of table are operating instructions, status confirmation, parameter setting, numeric monitoring, graphical monitoring and data analysis. The status confirmation confirms whether the wind power system is ready to start or not; the parameter setting sets PID parameters of control strategies in the wind power systems; the numeric monitoring and the graphical monitoring observe the information of grid network, excited generator, servo motor and battery. The front one is represented by numeric, and the latter one is represented by graphs. The operational area is able to control excited generator to connect to the grid network and the power factor correction. As the results, the experiment demonstrates that this study can apply this human-machine interface to the excited synchronous wind power system
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