cover
Contact Name
Catur Budi Waluyo
Contact Email
catur_budiwaluyo@stta.ac.id
Phone
+62274451263
Journal Mail Official
avitec@stta.ac.id
Editorial Address
Department of Electrical Engineering Sekolah Tinggi Teknologi Adisutjipto Jl. Janti, Blok R, Lanud Adisutjipto, Yogyakarta
Location
Kab. bantul,
Daerah istimewa yogyakarta
INDONESIA
AVITEC
ISSN : 26852381     EISSN : 27152626     DOI : 10.28989/avitec
This journal is the scientific publications journal published by Department of Electrical Engineering, Sekolah Tinggi Teknologi Adisutjipto. It aims to promote and disseminate the research finding in the development of management theories and practices. It will provide a platform for academicians, researchers, and practitioners to share their experience and solution to problems in different areas of journal scopes. Every submitted paper will be blind-reviewed by peer-reviewers. Reviewing process will consider novelty, objectivity, method, scientific impact, conclusion, and references.
Articles 55 Documents
MFCC dan KNN untuk Pengenalan Suara Artikulasi P Anggoro, Akhmad; Herdjunanto, Samiadji; Hidayat, Risanuri
AVITEC Vol 2, No 1 (2020): Februari 2020
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/avitec.v2i1.605

Abstract

Cleft lip and palate (CLP) is a term for patients who experience speech organ disorders, that disorder is caused by a gap found in the lip or palate. Patients will experience speech problems. Pattern recognition in CLP sound is still small in Indonesia. In this research in the language identification of CLP and standard sound patterns using the extraction of the Mel Frequency Cepstral Coefficients (MFCC) feature with K-Nearest Neighbor (KNN) classification and K-Fold cross-validation. By making words that have the letter /p/ as a reference, known as bilabial. The words used include Paku, Kapak, and Atap. The accuracy of recognition results reached more than 69%, with a minimum accuracy of 41%.
Pengendalian Pembuatan Asphalt Hot Mix Pada Asphalt Mixing Plant Menggunakan PLC Aziz, Prasetyo
AVITEC Vol 3, No 2 (2021): Agustus 2021
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/avitec.v3i2.977

Abstract

Asphalt hot mix manufacture consists of mixer and weighing which is a part of the mixing process which is controlled automatically using PLC at the asphalt mixing plant SPECO TSAP-800AS. All processes in the asphalt mixing plant have used computer-based electromechanical automation, especially the application of PLC control on the Mixer and Weighing section, considering that the mixing process must always be stable and run continuously so it must be controlled automatically using a combination of relays and air dampers. The scale sensor used is a load cell which functions to calculate the weight of solid material from hot bin CB1/1 to CB1/5. The mixer used has a capacity of 800 kilogram per batch. The design of controlling the manufacture of asphalt hot mix at the asphalt mixing plant TSAP-800AS was made using Outseal Studio V2.2 software.
Komunikasi Device-to-Device pada Jaringan Seluler 5G menggunakan mmWave Mulyadi, Rasheed Abdurrahman; Usman, Uke Kurniawan
AVITEC Vol 2, No 1 (2020): Februari 2020
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/avitec.v2i1.614

Abstract

This article discusses about device-to-device communication on 5G cellular networks using mmWave. Device-to-device communication will support 5G cellular technology, because it can be a solution to overcome the limitations of cellular coverage and service capacity. D2D can be used in a variety of applications. The main problem in D2D is that interference between signals in one cell will be very vulnerable to occur, so that effective resource management is needed. In addition, the use of D2D will also increase the complexity of a cellular system, in terms of resource management, interference, and also the routing required. Several studies have been carried out to create D2D communication that can be implemented effectively on 5G. One of them is research to perfect the load balancing scheme which is one of the functions obtained from D2D communication. Load balancing is the distribution of cellular traffic loads, using D2D the traffic load is channeled to communication between devices and reduces the burden on the main network.
Analisis Speaker Recognition Menggunakan Metode Dynamic Time Warping (DTW) Berbasis Matlab Prayoga, Noor Fita Indri; Astuti, Yenni; Waluyo, Catur Budi
AVITEC Vol 1, No 1 (2019): Agustus 2019
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/avitec.v1i1.492

Abstract

Voice is one of  way to communicate and express yourself. Speaker recognition is a process carried out by a device to recognize the speaker through the voice. This study designed a speaker recognition system that was able to identify speakers based on what was said by using dynamic time warping (DTW) method based in matlab. To design a speaker recognition system begins with the process of reference data and test data. Both processes have the same process, which starts with sound recording, preprocessing, and feature extraction. In this system, the Fast Fourier Transform (FFT) method is used to extract the features. The results of the feature extraction process from the two data will be compared using the DTW method. Calculations using DTW that produce the smallest value will be determined as the output. The test results show that the system can identify the voice with the best level of recognition accuracy of 90%, and the average recognition accuracy of 80%. The results were obtained from 50 tests, carried out by 5 people consisting of 3 men and 2 women, each speaker said a predetermined word
Analysis of Interference Between LTE System and TETRA System in The 800 MHz Band Natasha, Fadhilah; Usman, Uke Kurniawan; Satria, Rizky
AVITEC Vol 2, No 1 (2020): Februari 2020
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/avitec.v2i1.592

Abstract

Wireless communication is used in many sectors to support the need of communication, the example of wireless communication is applied in mission critical network. Wireless communication system that used in mission critical are Terrestrial Trunked Radio (TETRA) and Long Term Evolution (LTE). TETRA systems supports voice services while LTE supports voice and data services. Co-exsitence between LTE and TETRA in same frequency band is one of the optimilazition quality for mission critical network. For this final project analyses interference in co-exsitence between LTE and TETRA in frequency band 800 MHz. There are four scenarios using extended-hata model propagation in urban area. There are several parameters that reviewed, desired Received Signal Strength (dRSS), interfering Received Signal Strength (iRSS), Carrier to Interference ratio (C/I) and probability of interference. In all scenarios occur Co-Channel Interference (CCI) between LTE and TETRA in frequency band 800 MHz so the performance not optimal. The performance increased when add guard band variation. The variation that applied are 0,5 MHz, 0,75 MHz, 1 MHz. Based on the result of the simulation that have been done, proposed the used of guard band variation for elevate the performance.
Analisis Ketepatan Pengukur Tegangan True RMS Jala-Jala Listrik Berbasis Mikrokontroler ATmega 328P Nanda, Farobi Widia; Kurniawan, Freddy; Setiawan, Paulus
AVITEC Vol 2, No 2 (2020): Agustus 2020
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/avitec.v2i2.734

Abstract

The analog AC-voltmeter usually can only measure the ideal-sinusoid voltage with narrow frequency range. Meanwhile, in fact the grid voltage is often not in the form of an ideal sinusoidal.  To be able to measure a non-sinusoidal AC voltage with a wide range of frequency, a true-RMS voltmeter is needed. The research designed a true RMS measuring system using an ATmega 328P microcontroller. The input voltage is converted to pulse using Schmit triger and fed to the microcontroller’s external interrupt pin to calculate the input signal frequency. Meanwhile the microcontroller’s ADC sampled the input signal with a frequency of 128 times the signal’s frequency. RMS voltage calculations are performed using arithmetic operations for 16 and 32 bit integer variables. The test results show that the system can measure voltages with zero errors from 100 to 275 volts with a frequency of 50 Hz. The system can also measure voltages with zero errors at 220 volt with frequencies from 40 Hz to 150 Hz. However, this system can still be used to measure voltages ranging from 25 volts to 300 volts at frequencies from 35 Hz to 195 Hz with an average error of 0.21%. During RMS voltage calculation, the microcontroller’s CPU usage was 13.35%, so that this system can be further developed.
A Comparative Study Installation Arrangement of Primary Flight Display (PFD) in the Flight Deck’s Regional Passenger Transport Aircraft Prakasa, Anantia; Sophian, Indra Permana
AVITEC Vol 1, No 1 (2019): Agustus 2019
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/avitec.v1i1.505

Abstract

The Flight Deck or cockpit is designed to support the prosecution of its aircraft mission and these are what the Flight Deck design process needs to ensure but not limited to display design, aircraft control, automation, HCI on the Flight Deck and pilot’s view to outside namely external vision. The external vision must satisfy regulatory requirements which intended to ensure that the view is adequate for pilots to operate the aircraft safely and gives them a reasonable opportunity to see and avoid other aircraft that pose a collision threat. Concurrently during critical periods of flight, it is important that the flight crew access information in front of his view with minimal head rotation. Cockpit-Displays with critical flight information should then be located to these locations. Compromising both external and internal vision as Pilot’s visibility should be attained. Further, some OPTIONs to arrange the PFD in cockpit instrument panel give difficulty in term of its panel space, safety and comfort for the pilots. Two layout PFD’s, In-line and T-line layout, are evaluated in the new Regional Aircraft Cockpit using avionics 15.1” or 14.1” display. Due to cockpit space, the In-Line four of 15.1” display cannot fit the instrument panel and disregard; however the T-Line for 15.1” display is possible as OPTION 1. The four of 14.1” displays are possible to arrange as In-Line and T-Line layout as OPTION 2 and OPTION 3 respectively, and both may offer compliance to regulatory requirements also to both Pilot’s external and internal vision.
Kursi Roda Elektrik dengan Kendali Gestur Kepala Prilian, Tiar; Rusmana, Iyus; Handayani, Trie
AVITEC Vol 3, No 1 (2021): Februari 2021
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/avitec.v3i1.830

Abstract

A wheelchair is a tool that can be used to mobilize patients who experience paralysis, especially paralysis in the legs, so they can move from one place to another independently. An electric wheelchair is a type of wheelchair that can be controlled by a patient without having to be controlled by another person. The design of this tool utilizes an ADXL335 accelerometer sensor mounted on the patient's head as a determinant of the direction of wheelchair movement, BTS7960 as a DC motor driver, a motor wiper as the main drive for a wheelchair, and the Atmega328P microcontroller as an input and output processor. Gestures of the patient's head (looking down, looking up, head tilted to the right, tilting left) will produce a different voltage output which will be processed by Atmega328P as a determinant of the direction of motion which will be sent to the BTS790 driver to drive the wiper motor as the main driver of the wheelchair. The method of testing and measurement carried out by testing the response of the ADXL335 accelerometer sensor, with the test results of the ADXL335 accelerometer sensor having an accuracy of determining the direction of motion of 100%. The results of head gesture control testing the average wheelchair speed of 2.3 km / hour with a patient weight of 40-60 kg, and the test results of battery endurance in a wheelchair of 5.07 hours with a patient weight of 40-70 kg with a 12V18Ah battery.
Analisis dan Desain Antena Mikrostrip untuk Komunikasi Satelit pada Frekuensi Ka-Band Rizqa, Fariany; Arseno, Dharu; Yunita, Trasma
AVITEC Vol 2, No 1 (2020): Februari 2020
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/avitec.v2i1.590

Abstract

Satellite technology is a telecommunications technology where the satellite is a communication device placed in space and requires the allocation of the frequency spectrum for telecommunications services. The most widely used frequencies for satellite communication are the C-Band frequency (4 GHz to 8 GHz) and the Ku-Band frequency (12 GHz to 18 GHz). Also, Ka-Band frequency (26,5 GHz to 40 GHz) is the center of attention in the telecommunications industry nowadays because it has a large enough bandwidth to accommodate more service capacity. In this article, a microstrip antenna with a rectangular patch of four elements (array 2x2) has been designed using line feed rationing techniques that work at a frequency of 29,25 GHz (Ka-Band) for satellite communication. An appropriate antenna dimension is required so that the antenna can work and has a good performance at the expected frequency. Simulation results show a return loss value of -43,052 dB, VSWR is worth 1,014 with a bandwidth of 2,728 GHz. In addition, the resulting gain value is 7,823 dB with directional radiation patterns and ellipse polarization.
Penentuan Orientasi dan Translasi Gerakan UAV menggunakan Data Fusion berbasis Kalman Filter Kurniawan, Freddy; Erdata Nasution, Muhammad Ridlo; Dinaryanto, Okto; Lasmadi, Lasmadi
AVITEC Vol 3, No 2 (2021): Agustus 2021
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/avitec.v3i2.890

Abstract

In an unmanned aircraft vehicle, a navigation system is needed to calculate its orientation and translation. The navigation system can utilize data from the accelerometer, gyroscope, magnetometer, and GPS. The orientation can be precisely calculated from the accelerometer and magnetometer data when the sensor is in a static state. Meanwhile, under dynamic conditions, the orientation can be more precisely calculated from the gyroscope data. In order to obtain the robust navigation system, a data fusion based on Kalman filter is built to calculate the orientation from the accelerometer, gyroscope, and magnetometer. The Kalman filter trusts more in the data from the accelerometer and magnetometer when the UAV is static and trusts more in to the gyroscope data when the UAV is in dynamic conditions. Meanwhile, the UAV translation is obtained by performing data fusion of the accelerometer data with location data from the GPS sensor. The Kalman filter combines data from the accelerometer and GPS when available, otherwise trusts in data from the accelerometer only. The trust level shifting is done by changing the measurement noise covariance. The data fusion based on Kalman filter provides more accurately the orientation and translation data. The orientation as a result of the calculation from the gyroscope has an average error of 18.12%, while the orientation as a result of the accelerometer and magnetometer has an error of 1.3%. By using Kalman filter-based data fusion, the error of the orientation decreases to 0.87%