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Fuzzy Controller from Experts’ Rules for Middle Axis Ball and Beam Nguyen, Minh-Quan; Nguyen, Manh-Cuong; Trinh, Quang-Huy; Nguyen, Trung-Nghia; Ngo, Van-Thiet; Phu, Huynh-Manh-Trien; Nguyen, Pham-Minh-Duc; Nguyen, Phu-Tan; Le, Van-Truong; Dinh, Le-Hai-Duong; Dam, Thuan-An; Nguyen, Duc-Huy; Nguyen, Van-Dong-Hai
Journal of Fuzzy Systems and Control Vol. 1 No. 3 (2023): Vol. 1, No. 3, 2023
Publisher : Peneliti Teknologi Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59247/jfsc.v1i3.94

Abstract

The present study examined the nonlinear system of Ball and Beam, to design an intelligent controller for this dynamic system. The authors formulated a mathematical model for the system and performed simulation testing using MATLAB to control it. It is noteworthy that the mathematical model was exclusively used for simulation purposes and not for building the controller. The author's team then proceeded to develop a Fuzzy Controller for the simulation model of the Ball and Beam system. Subsequently, the team tested the Fuzzy controller on the actual Ball and Beam model. The primary objective of this study was to assess the feasibility of building and controlling an intelligent controller for a nonlinear object, without relying on its mathematical model. The findings of the study can be useful in designing and controlling complex systems that are difficult to model mathematically.
Development of a Novel Umbilical Retraction Mechanism for a Launch Vehicle Nguyen, Manh-Cuong; Pham, Van-Tung; Nguyen, Van-Tinh; Nguyen, Duy-Hung
Journal of Engineering and Technological Sciences Vol. 57 No. 2 (2025): Vol. 57 No. 2 (2025): April
Publisher : Directorate for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2025.57.2.7

Abstract

Umbilical or umbilical cable supplies are required for an apparatus, such as a space vehicle, or for a person, a diver, or an astronaut. For launch vehicles, umbilical cables provide essential elements like electrical power, communication, and pressurized gases before liftoff. Ensuring the retraction of these cables is crucial for preventing potential damage during the launch process. This paper addresses a novel mechanism for umbilical retraction in the launch vehicle loading process. This mechanism is based only on the principles that borrow the vehicle’s launch motion to generate a cable-cutting action, and no power is required. The new design of the umbilical retraction device is optimized through simulation and validated by the experiment. The results confirm that the introduced mechanism works effectively with a maximum number of 20 umbilical cables consisting of two forms, namely PVC and metal covers.