Vol. 24 No. 2 (2009)

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…

Rolling bearing is a mechanical component which is commonly used in industrial machinery to suppress mechanical losses due to friction. Health condition of those machines are monitored by measuring its vibration responses as normally conducted in predictive maintenance (PdM) technology. There are two important steps in PdM, i.e. frequency spectrum analysis for diagnostic purpose and control trip value which is based on the root mean square (RMS) vibration level evaluation of the machine in operation. The vibration response measuring results show, the floor noise level contributs to the…

This paper describes the development of computer application for computing the wing lift distribution and auto-locating each sectional lift force to the appropriate nodes of wing-box finite element model (FEM). In Catia-V5 environment, Visual Basic.Net is intensively utilized to access several Catia

This research deals with the integration product design phase, the process planning phase, and manufacturing operation planning phase through the feature-based product modeling. The competition in manufacturing industries demands a short production lead time. Autonomous Distributed Manufacturing Systems which has autonomic production elements enable to integrate those three phases through its autonomic product model. One of the proposed methodologies is a feature-based product modeling. At feature base product modeling, a product was defined as a model that is an interaction among features.…

This paper presents the modeling and simulation of the gas turbine generating system of Tanjung Priok Combined Cycle Power Plant. The gas turbine model is approximated using steam turbine systems. The model developed only accepts load changes as input to the system. Three types of control systems; speed-droop governor, speed-droop governor with integral control, and speed-droop governor with integral and derivative control have been tried to control the frequency of the system. The simulation results show that, in the presence of load changes, the speed-droop governor with integral and…