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181 results on '"Ahmad, Salmiah"'

1. Analysis of Training Function for NNARX in Solar Radiation Prediction Modeling

Author

Mohd, Mohd Rizman Sultan, Johari, Juliana, Ruslan, Fazlina Ahmat, Razak, Noorfadzli Abdul, Ahmad, Salmiah, Shah, Ahmad Syahiman Mohd, Angrisani, Leopoldo, Series Editor, Arteaga, Marco, Series Editor, Panigrahi, Bijaya Ketan, Series Editor, Chakraborty, Samarjit, Series Editor, Chen, Jiming, Series Editor, Chen, Shanben, Series Editor, Chen, Tan Kay, Series Editor, Dillmann, Rüdiger, Series Editor, Duan, Haibin, Series Editor, Ferrari, Gianluigi, Series Editor, Ferre, Manuel, Series Editor, Hirche, Sandra, Series Editor, Jabbari, Faryar, Series Editor, Jia, Limin, Series Editor, Kacprzyk, Janusz, Series Editor, Khamis, Alaa, Series Editor, Kroeger, Torsten, Series Editor, Li, Yong, Series Editor, Liang, Qilian, Series Editor, Martín, Ferran, Series Editor, Ming, Tan Cher, Series Editor, Minker, Wolfgang, Series Editor, Misra, Pradeep, Series Editor, Möller, Sebastian, Series Editor, Mukhopadhyay, Subhas, Series Editor, Ning, Cun-Zheng, Series Editor, Nishida, Toyoaki, Series Editor, Pascucci, Federica, Series Editor, Qin, Yong, Series Editor, Seng, Gan Woon, Series Editor, Speidel, Joachim, Series Editor, Veiga, Germano, Series Editor, Wu, Haitao, Series Editor, Zamboni, Walter, Series Editor, Zhang, Junjie James, Series Editor, Alfred, Rayner, editor, and Lim, Yuto, editor

Published
2022
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2. Design, simulation and experiment of PSO-FOPID controller for height position control of a scissor mechanism platform

Author

Norsahperi Nor Mohd Haziq, Ahmad Salmiah, Toha Siti Fauziah, and Mutalib Mohd Azri Abd

Subjects
motorised adjustable vertical platform, fractional order pid, particle swarm optimisation, scissor mechanism, satellite test, optimal control, Engineering (General). Civil engineering (General), TA1-2040, Mechanics of engineering. Applied mechanics, TA349-359
Abstract

This paper proposes the PSO-FOPID controller, which is a Fractional Order Proportional-Integral-Derivative (FOPID) controller tuned using particle swarm optimization with spreading factor algorithm for height position control of a scissor mechanism platform. The tuning process of five control gains in the FOPID controller is technically challenging to achieve high position accuracy. In this study, this problem is addressed through the offline tuning method by using particle swarm optimization with the spreading factor algorithm to reduce the complexity in tuning the control gains. From the experimental study, it is found that the proposed controller can eliminate the steady-state error under the two input references with approximately 1.5% and 0.9% reductions of the overshoot and undershoot in the height position response as compared to its promising performances in simulations. It is envisaged that the PSOFOPID controller can be useful in designing effective height position control of a non-linear platform.

Published
2022
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8. Design and Material Analysis of Spherical Mobile Robot for Bouncing Mechanism

Author

Abdullah, Muhammad Amirul, Ahmad, Salmiah, Toha, Siti Fauziah, Rannenberg, Kai, Editor-in-chief, Sakarovitch, Jacques, Series editor, Goedicke, Michael, Series editor, Tatnall, Arthur, Series editor, Neuhold, Erich J., Series editor, Pras, Aiko, Series editor, Tröltzsch, Fredi, Series editor, Pries-Heje, Jan, Series editor, Whitehouse, Diane, Series editor, Reis, Ricardo, Series editor, Furnell, Steven, Series editor, Furbach, Ulrich, Series editor, Winckler, Marco, Series editor, Rauterberg, Matthias, Series editor, Chbeir, Richard, editor, Manolopoulos, Yannis, editor, Maglogiannis, Ilias, editor, and Alhajj, Reda, editor

Published
2015
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15. Integrated Modelling and Control of Linear Actuator Based Automatic Pedal Pressing Mechanism for Low-Speed Driving in a Road Traffic Delay.

Author

Hashim, Azrul Azim Abdullah, Ahmad, Salmiah, Ghani, Nor Maniha Abdul, and Nasir, Ahmad Nor Kasruddin

Subjects
TRAFFIC engineering, AUTOMOBILE driving, TRAFFIC congestion, ELECTRIC circuits
Abstract

Sitting in traffic congestion for hours in a posture that requires recurrent actions of manually pressing the pedal and braking excessively can result in fatigue, especially on the driver's leg and back. This fatigue can have long-term implications and adversely affect the driver's health. Thus, this paper aims to model and develop a control system that utilizes a linear actuator to replace the leg activities involved in pressing and releasing the brake pedal. This approach, combined with the implementation of a PID controller, offers a novel solution to control the vehicle speed by integration with the linear actuator that focus on low-speed driving condition. The design process begins with creating a 3D model using SolidWorks to visualize the movement of the linear actuator and Pedal subsystem. This model is then connected to Matlab-Simulink, where a PID controller is implemented and integrated into the electrical circuit to control the actuator's movement. Integration with the vehicle dynamic model enables a comprehensive analysis of the system's behavior on the vehicle dynamics. This research compares the trial and error method with the Matlab tuner for implementing the PID controller. The performance of the system will be evaluated based on the steady state error, overshoot, rise time, and settling time. The results demonstrate that the Matlab tuner outperforms trial and error method by achieving a faster response and significantly reducing steady state error during robustness testing. With the integration of the linear actuator, the system is capable of tracking the desired speed and has the potential to replace the leg activities involved in pressing and releasing the brake pedal. For future work, validating the proposed mechanism with a physical prototype of the linear actuator and pedal using hardware-in-the-loop techniques poses a challenge, as hardware constraints may vary with different environments. [ABSTRACT FROM AUTHOR]

Published
2023
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19. Design, simulation and experiment of PSO-FOPID controller for height position control of a scissor mechanism platform

Author

Norsahperi, Nor Mohd Haziq, Ahmad, Salmiah, Toha, Siti Fauziah, Abd Mutalib, Mohd Azri, Norsahperi, Nor Mohd Haziq, Ahmad, Salmiah, Toha, Siti Fauziah, and Abd Mutalib, Mohd Azri

Abstract

This paper proposes the PSO-FOPID controller, which is a Fractional Order Proportional-Integral-Derivative (FOPID) controller tuned using particle swarm optimization with spreading factor algorithm for height position control of a scissor mechanism platform. The tuning process of five control gains in the FOPID controller is technically challenging to achieve high position accuracy. In this study, this problem is addressed through the offline tuning method by using particle swarm optimization with the spreading factor algorithm to reduce the complexity in tuning the control gains. From the experimental study, it is found that the proposed controller can eliminate the steady-state error under the two input references with approximately 1.5% and 0.9% reductions of the overshoot and undershoot in the height position response as compared to its promising performances in simulations. It is envisaged that the PSOFOPID controller can be useful in designing effective height position control of a non-linear platform.

Published
2022

21. Palm Oil Based Polyurethane Foams

Author

Ahmad, Salmiah, Siwayanan, Parthiban, Lye, Ooi Tian, Ali, Rohana, Rafaei, Azman, Zainuddin, Zuhairi, Wiese, Dieter, Choo, Chua Meng, Prasad, Paras N., editor, Mark, James E., editor, and Fai, Ting Joo, editor

Published
1995
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44. Dishwashing performance of mixed palm stearin sulfonated methyl esters—Nonylphenol ethoxylate alcohol

Author

Wen Huei Lim and Ahmad Salmiah

Subjects
chemistry.chemical_compound, Chromatography, Nonylphenol ethoxylate, Chemistry, General Chemical Engineering, Alcohol, Physical and Theoretical Chemistry, Mixed micelle, Palm stearin, Surfaces, Coatings and Films, Sodium salt
Abstract

The dishwashing performance of sodium salts of α-sulfonated methyl esters derived from palm stearin (α-SMEPS) and nonylphenol ethoxylate alcohol (NPEO) in mixed micelle systems was evaluated as a function of weight ratio at different water hardness values (5.12, 51.2, and 512.0 ppm CaCO3) and temperatures (20, 30, and 45°C). Manipulating several parameters, such as weight ratios in α-SMEPS and NPEO mixtures, washing temperature, and water hardness, can enhance detergency performance. In comparison, detergency efficiency of the mixtures increased as follows: α-SMEPS/NPEO 400

Published
2004

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