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All Journal Jurnal Teknik ITS IPTEK Journal of Proceedings Series JMES The International Journal of Mechanical Engineering and Sciences Jurnal Rekayasa Mesin
Unggul Wasiwitono
Departemen Teknik Mesin Institut Teknologi Sepuluh Nopember
Aerospace Engineering Automotive Engineering Computer Science & IT Control & Systems Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Modeling and Control of Anti-Rolling Gyro System to Stabilize Single-Track Vehicle Buntheng Chhornand; Unggul Wasiwitono
IPTEK Journal of Proceedings Series No 6 (2020): 6th International Seminar on Science and Technology 2020 (ISST 2020)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23546026.y2020i6.8903

Abstract

Two-wheeled vehicle has many advantages such as small size, more efficiency, and more maneuverable. These advantages come at the lack of stability and safety. To improve the stability and safety of a two-wheeled vehicle, the Control Moment Gyroscopic Stabilization is considered. This system is composed to generate counteracting roll stabilizing torque. In this study, the system of gyroscopic stabilizer is simulated and validated to be implemented into a two-wheeled vehicle. Proportional-Integral-Derivative (PID) controller is designed to control the gimbal for generating the balancing torque. The performance of the proposed controller is evaluated through simulation for non-linear cases. The result of the non-linear model confirms a good balance in terms of rapid response.
KASITS: A Graphical User Interface for Kinematic Analysis and Synthesis of Five-Bar Linkage with Prismatic Joint Taufik Ali Rahman; Achmad Saiful Hadi; Latifah Nurahmi; Ari Kurniawan Saputra; Bambang Pramujati; Unggul Wasiwitono; Arockia Selvakumar
JMES The International Journal of Mechanical Engineering and Sciences Vol 5, No 1 (2021)
Publisher : LPPM, Institut Teknologi Sepuluh Nopember, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25807471.v5i1.7748

Abstract

In this paper, a novel graphical user interface is developed for kinematic analysis and synthesis of five-bar linkage with prismatic joint, named KASITS. This interface has two menus that the users can freely select, namely for analysis and synthesis. In the analysis menu, the direct kinematics are derived to visually depict the overall workspace of the mechanism. Within this workspace, the singularity curves are plotted. In the synthesis menu, the value of design parameters is obtained for a given trajectory. An optimization is employed based on Pareto optimal solutions. The demonstration is provided to guide the users better.
Complex Potential Methods for a Crack and Three-phase Circular Composite in Anti-plane Elasticity Alief Wikarta; Unggul Wasiwitono; Indra Sidharta
JMES The International Journal of Mechanical Engineering and Sciences Vol 1, No 1 (2017)
Publisher : LPPM, Institut Teknologi Sepuluh Nopember, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25807471.v1i1.2212

Abstract

An interaction between an anti-plane crack with a three-phase circular composite by using complex potential methods is considered in this paper. The solution procedures for solving this problem consist of two parts. In the first part, based on complex potential methods in conjunction with analytical continuation theorem and alternating technique, the complex potential functions of a screw dislocation interacting with three-phase circular composites are obtained. The second part consists of the derivation of logarithmic singular integral equations by introducing the complex potential functions of screw dislocation along the crack border together with superposition technique. The logarithmic singular integral equations are then solved numerically by modeling a crack in place of several segments. Linear interpolation formulae with undetermined coefficients are applied to approximate the dislocation distribution along the elements, except at vicinity of the crack tip where the dislocation distribution preserves a square-root singularity. The mode-III stress intensity factors are then obtained numerically in terms of the values of the dislocation density functions of the logarithmic singular integral equations.
Dynamic Analysis of Narrow Tilting Three Wheeled Vehicle (NTTWV) with LQG Control Muhammad Fadlil Adhim; Unggul Wasiwitono
JMES The International Journal of Mechanical Engineering and Sciences Vol 1, No 2 (2017)
Publisher : LPPM, Institut Teknologi Sepuluh Nopember, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25807471.v1i2.3329

Abstract

The need for compact vehicles will increase in urban areas in the future. This paper propose solution by designing a vehicle that can combine advantage of car such as comfort and safety and the advantage of motorcycle such as efficiency and lightweight. The proposed vehicle has 3 wheels, 2 front wheels as steering wheels and the rear wheel as traction wheel. Active tilting system is used to give desired roll angel  that can resist the centrifugal force to maintain the vehicle stability. The goals of this research are to design dynamic model and control of NTTWV and its control system. The simulation result showed that the NTTWV rolls only 60% of ideal motorcycle rolling angle at same velocity and turning radius. The improvement of critical speed compared to non-tilting three-wheeled vehicle at steer angle = 5 deg and  10 deg are 193% and 171%.
KINETO-DYNAMIC PADA VARIABLE GEOMETRY SUSPENSION (VGS) Abdi, Ferly Isnomo; Wasiwitono, Unggul; Arizal, Heru; Ramadani, Ali Hasbi
Jurnal Rekayasa Mesin Vol 6 No 02 (2021): JRM
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jrm.v6i02.43154

Abstract

Suspension technology on the vehicle provides a comforting effect with shock absorbers and a safety effect in driving and reducing the accident rate. The suspension system was developed by changing the construction and mechanism as well as the addition of a control element. Variable Geometry Suspension (VGS) is the development of a suspension system by using an active actuator is Single-link which is used to change the geometry of the suspension. Geometry change can affect the performance of the suspension system, so a modeling approach is needed to analyze the performance of the VGS system. The VGS modeling uses a quarter-vehicle model and a multi-body model with an equation of motion system using a Kineto-dynamic model with a double-wishbone suspension type. The analysis method on the VGS uses input is bumpy-road to obtain system performance in body acceleration, suspension deflection, and tire deformation. The results of the VGS with the Kineto-dynamic model has a range of 2 mm in the variation of the single-link angle, the performance values ??in the body acceleration and tire deformation between the quarter-vehicle and multi-body models have the same oscillations until steady, while the suspension deflection in the Kineto-dynamic model differs in the first oscillation with a steady time of 1.6 seconds. Therefore, the Kineto-dynamic model can be used to approximate the actual system.
Co-Authors Achmad Saiful Hadi Agus Sigit Pramono Ali Hasbi Ramadani Alief Wikarta Aris Yudha Setiawan Arockia Selvakumar Bambang Pramujati Buntheng Chhornand Dika Bayu Prasetyo Ferly Isnomo Abdi Heru Arizal I Gusti Agung Komang Diafari Djuni Hartawan Idestrian Adzanta Indra Sidarta Indra Sidharta Maulana Syarif Habibi Muhammad Fadlil Adhim Muhammad Sukma Wirayudha Sunggono Mukhamad Ilham Alfian Nurahmi, Latifah Rizal Pribadi Restuaji Samnang Chheang Sutikno Sutikno Taufik Ali Rahman Yansen Prayitno