Garuda - Garba Rujukan Digital

DEVELOPMENT OF COAXIAL ROTOR MICRO UNMANNED AERIAL VEHICLE Thien, H. P; Mulyanto, T; Muhammad, H; Suzuki, S
Mesin Vol 24, No 2 (2009)
Publisher : Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (861.224 KB)

Micro Unmanned Helicopter with ability of takeoff, landing and hovering offeres excellent support tool for missions in indoor environment. In this paper, a review of preliminary studies towards the development of autonomous coaxial helicopter MAV is presented. The paper starts with the statement of coaxial helicoper MAV development. Then, it is continued by the introduction of development of dynamic model for a typical coaxial rotor platform. In the third issues, initial steps in development of sensory system and control system will be dealt with. In brief, an analytical mathematical model has successful derived. This model together with the developed sensor system will act important role towards the full development of the dynamics model as the system identification is carried out.

The Application of The Steepest Gradient Descent for Control Design of Dubins Car for Tracking a Desired Path Miswanto, Miswanto; Pranoto, I.; Muhammad, H; Mahayana, D
Limits: Journal of Mathematics and Its Applications Vol 4, No 1 (2007)
Publisher : Institut Teknologi Sepuluh Nopember

In this paper, we consider the control design of the Dubins car system to track a desired path. We design the control of the Dubins car system using optimal control approach. The control of the Dubins car system is designed for tracking the desired path. Instead of the usual quadratic cost function, a special type of cost functional which includes a tracking error term will be considered. By this special cost functional, the minimum tracking error of path of the Dubins car toward a desired path using Pontryagin Maximum Principle is obtained. The analytical solution of the Hamiltonian system is diÂ±cult to obtain. So, a numerical solution with the steepest gradient descent method is proposed. The numerical results are given at the last section of this paper.

PEMBUATAN DAN PENGUJIAN SENSOR ULTRASONIK SEBAGAI FEEDBACK PADA SISTEM KENDALI OTOMATIK PITCH ATTITUDE HOLD Zaeny, U. M; Indriyanto, T; Muhammad, H
Mesin Vol 22, No 1 (2007)
Publisher : Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (445.206 KB)

Standard altimeter, i.e. static tube, does not work accurate enough for vehicle flying several meters from the ground. One alternative for measuring altitude in this case is using ultrasonic range-meter. This idea is brought further by using two range-meters to measure pitch attitude. Laboratory experiments were conducted to study this idea statically by constructing them in an inclined moving bar and dynamically by arranging them in a Pitch Attitude Hold control system.

Comparison between Vortex-In-Cell and Vortex Particle Methods on Two-Dimensional Problem Canh, C X; Zuhal, L R; Muhammad, H
AVIA Vol 3, No 1: (June, 2021)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47355/avia.v3i1.40

This research is concerned with the two-dimensional vortex method (VM) solvers. We develop and investigate the performance of the Vortex-In-Cell (VIC) and Vortex Particle Method (VPM) which are well known as the VMâ€™s family members. The advantage of these both methods are that we can accelerate velocity computation procedure, an N-body problem in numerical methods, by using Fast Fourier Transform (FFT) and Fast Multipole Method (FMM), respectively. In addition, the viscous calculation process in VPM can be accelerated by using a scheme of Nearest Neighbor Particle Searching (NNPS) algorithms. Moreover, the no-through boundary condition treatment issue can be easily handled by using an immersed boundary condition for both methods. The accuracy and numerical cost of both numerical methods will be examined by simulating flow over an Impulsively Started Circular Cylinder and comparisons

The Rate of S-Element Transformation to Sulfate on Three Kinds of Soils With and Without Addition of Organic Matter H Muhammad; S Sabiham; A Rachim; H Adijuwana
Jurnal Ilmu Tanah dan Lingkungan Vol 7 No 1 (2005): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Defiency of sulfur were found at many areas of farming in Indonesia. The aim of this experiment was to Icnow the rate ofS-element tranformation to sulfate on three kinds of soil without and added of organic matter. The experiment was conducted using a Randomized Complete Design with factorial pattern consist of two factors and two replications. The first factor is kinds of soil, i.e. Udic Haplusters, Typic Haplustepts, and Oxyaquic Udipsamment. The second factor is dosage of S-element consist offive levels i.e. 20, 40, 60, 80, and 100 mg kg"'. Experiment was arranged in two groups, i.e. without and added 1% of organic matter treatment. Sulfate of each treatment was extracted every ten days by Ca(H]PO.J] content of 500 mg kg"' Pand measured by spectrophotometer on A 432 nm. The result showed that the rate of transformation of S-element to sulfate is significantly affected by kind of soil, S-element dosage, and their interaction. That transformation was on the increase by increasing of time incubation, but the oxidized S persentage was on decrease with an increase of S-element dosage. Addition of organic matter accelerated ransformation of S-element to sulfate on the first stage and decreased with an increase of time incubation.

PEMBUATAN DAN PENGUJIAN SENSOR ULTRASONIK SEBAGAI FEEDBACK PADA SISTEM KENDALI OTOMATIK PITCH ATTITUDE HOLD U. M Zaeny; T Indriyanto; H Muhammad
Mesin Vol. 22 No. 1 (2007)
Publisher : Mesin

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

Standard altimeter, i.e. static tube, does not work accurate enough for vehicle flying several meters from the ground. One alternative for measuring altitude in this case is using ultrasonic range-meter. This idea is brought further by using two range-meters to measure pitch attitude. Laboratory experiments were conducted to study this idea statically by constructing them in an inclined moving bar and dynamically by arranging them in a Pitch Attitude Hold control system.

DEVELOPMENT OF COAXIAL ROTOR MICRO UNMANNED AERIAL VEHICLE H. P Thien; T Mulyanto; H Muhammad; S Suzuki
Mesin Vol. 24 No. 2 (2009)
Publisher : Mesin

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

Micro Unmanned Helicopter with ability of takeoff, landing and hovering offeres excellent support tool for missions in indoor environment. In this paper, a review of preliminary studies towards the development of autonomous coaxial helicopter MAV is presented. The paper starts with the statement of coaxial helicoper MAV development. Then, it is continued by the introduction of development of dynamic model for a typical coaxial rotor platform. In the third issues, initial steps in development of sensory system and control system will be dealt with. In brief, an analytical mathematical model has successful derived. This model together with the developed sensor system will act important role towards the full development of the dynamics model as the system identification is carried out.

Title

Found 7 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 7 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 7 Documents
Search