Article Per Year (5 Year)
p-Index From 2021 - 2026
0
P-Index
This Author published in this journals
All Journal Jurnal Teknologi Dirgantara
Wahyu Widada
Pusat Teknologi Wahana Dirgantara
Aerospace Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Mechanical Engineering Physics

Published : 7 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 7 Documents
Search

 1 
RANCANG-BANGUN SISTEM FLIGHT-RECORDER SEDERHANA UNTUK PELUNCURAN ROKET Wahyu Widada
Jurnal Teknologi Dirgantara Vol 2, No.2 Desember (2004)
Publisher : National Institute of Aeronautics and Space - LAPAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.jtd.2004.v2.a805

Abstract

In the rocket launch campaign, the telemetry system is very important system in order to send various data from the sensor to the base-station. However the signal of telemetry is not usually in good condition, and the data is very dificult to analyze. In this paper described the method to backup the sensor data by use of flight-recorder. It was very useful if the recovery of payload was successful, and the data flight can be analyze. The system used 2 wire serial eeprom with 131.071 byte of memory and 6 input for analog channels. The speed recording was 10 ms or 100 data per second.
RANCANGAN DAN ANALISA ANTENA DI PERMUKAAN BADAN ROKET Sri Kliwati; Wahyu Widada
Jurnal Teknologi Dirgantara Vol 2, No.1 Juni (2004)
Publisher : National Institute of Aeronautics and Space - LAPAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.jtd.2004.v2.a791

Abstract

The antenna telemetry is usually placed in the body of LAPAN rocket for the launching campaign, which affected to the quality of radio communication. Especially, such effect increas the antenna overshadow to the surface of body rocket, which not influenced to the aerodynamic of rocket. This antenna was made by using the PCB plate with size of 1 cm width and 1 per 2 also 1 per 4 length for the frequency of 900 MHz
RANCANG BANGUN PROTOTIPE SISTEM HEADING AUTOPILOT BERBASIS RATE-GYROSCOPE DAN MICROCONTROLLER Wahyu Widada
Jurnal Teknologi Dirgantara Vol 4, No.2 Desember (2006)
Publisher : National Institute of Aeronautics and Space - LAPAN

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This paper discusses an experiment result of the prototype system feedback control for vehicle heading autopilot. The heading angle is measured with a rate-gyroscope and controlling with a control system based on a microcontroller and a stepper motor. This system is successfully realized within 0.5 degree of the error for heading angle. The accuracy of heading sensor is decrease due to vibration from stepper motor. To overcome such problem we recommended to use an analog lowpass filter and a mounting anti vibration. Keywords: Heading autopilot, Rate-gyroscope, Stepper motor, AVR microcontroller.
PENGEMBANGAN MODEM AFSK UNTUK TELEMETRI MUATAN ROKET UHF Wahyu Widada
Jurnal Teknologi Dirgantara Vol 4, No.1 Juni (2006)
Publisher : National Institute of Aeronautics and Space - LAPAN

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Modem is an important component in the telemetry data system of the rocket. The telemetry data based on amateur radio is usually used an AFSK modem. This paper describes the development of AFSK modem using a microcontroller which the speed can be set to the maximum bandwidth of the radio. The prototype is use a 16 MHz of microcontoller and the speed can be set to 2.4 kbps that available to the standard bandwidth of an amateur radio. Keywords: AFSK modem, Band-rate, Telemetry, Roket, Telemetry, UHF.
PENGEMBANGAN DETEKTOR SIGNAL RADIO MULTI CHANNEL UNTUK RADIO TRACKING ROKET MENGGUNAKAN LOGARITMIK AMPLIFIER Satria G. Zain; Adi Susanto; Thomas Sri Widodo; Wahyu Widada; Sri Kliwati
Jurnal Teknologi Dirgantara Vol 6, No.2 Desember (2008)
Publisher : National Institute of Aeronautics and Space - LAPAN

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Pengukuran kuat signal radio telemetri roket sangat penting dilakukan untuk mengetahui hubungan kualitas signal dan data yang diterima. Power meter ini juga dapat diaplikasikan untuk deteksi perubahan sudut elevasi dan azimuth trayektori roket dengan menggunakan array antena yagi yang telah dikembangkan metodenya. Power meter radio mempunyai rentang pengukuran yang sempit, sehingga terjadi saturasi untuk pengukuran radio dengan power yang cukup besar. Tulisan ini membahas desain dan pengembangan power detektor untuk mendeteksi signal radio pada sistem telemetri roket dengan maksimum pengukutan 1 watt dan dapat diubah sesuai dengan kebutuhan. Signal power meter ini berbasis logarithmic amplifier dengan lebar band sampai dengan 100 db dengan ketelitian 0.02 dB.
PENERAPAN LOW PASS FILTER UNTUK MEMPERBAIKI HASIL ESTIMASI SUDUT PADA SISTEM RADIO TRACKING ROKET Satria Gunawan Zain; Adhi Susanto; Thomas Sri Widodo; Sri Kliwati; Wahyu Widada
Jurnal Teknologi Dirgantara Vol. 8 No.1 Juni 2010
Publisher : National Institute of Aeronautics and Space - LAPAN

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Radio tracking system can be applied to track the position of a rocket and is potential to be developed to replace the GPS technology. This system is used to estimate the direction angle (azimuth and elevation) of transmitter source. In measurement and trial there are many noises that cause the results of angle estimation are not accurate. These noises can be obsreved from the value of the angle estimation varied for a fixed measurement point. This is caused by the interference on the received sinyal. This paper discusses the application of low pass filter to eliminate noises in the radio receiver system. Experiment results show that the variation of estimates angle becomes 1600 times smaller compared to the one without filter
METODE KALIBRASI TIME DIFFERENT OF ARRIVAL TDOA UNTUK SISTEM PASSIVE RADAR TRAYEKTORI ROKET Wahyu Widada; Sri Kliwati
Jurnal Teknologi Dirgantara Vol 5, No.2 Desember (2007)
Publisher : National Institute of Aeronautics and Space - LAPAN

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Design passive ranging base on radio with Time Different of Arrival TDOA (passive RADAR) have been developed for the application of tracking rocket trajectory. Calibration of the passive RADAR can be done in launching site for obtaining optimal position, however it is also require to be done in laboratory for testing the system algorithm. This article describes the calibration method of time delay calculation in laboratory using antenna cable with various of lengths. We obtain an accurate correlation results between time delay from measurement of oscilloscope and calculation TDOA with cross-correlation method. This method is practical and effective for calibration system in the development of passive RADAR. Keywords: TDOA, Passive RADAR, Trajectory rocket, Calibration method, Cross-correlation.
Co-Authors Adhi Susanto Adi Susanto Satria G. Zain Satria Gunawan Zain Sri Kliwati Thomas Sri Widodo