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30 results on '"Rokonuzzaman, Mohammad"'

1. A Comprehensive Review on Autonomous Navigation

Author

Nahavandi, Saeid, Alizadehsani, Roohallah, Nahavandi, Darius, Mohamed, Shady, Mohajer, Navid, Rokonuzzaman, Mohammad, and Hossain, Ibrahim

Subjects
Computer Science - Robotics
Abstract

The field of autonomous mobile robots has undergone dramatic advancements over the past decades. Despite achieving important milestones, several challenges are yet to be addressed. Aggregating the achievements of the robotic community as survey papers is vital to keep the track of current state-of-the-art and the challenges that must be tackled in the future. This paper tries to provide a comprehensive review of autonomous mobile robots covering topics such as sensor types, mobile robot platforms, simulation tools, path planning and following, sensor fusion methods, obstacle avoidance, and SLAM. The urge to present a survey paper is twofold. First, autonomous navigation field evolves fast so writing survey papers regularly is crucial to keep the research community well-aware of the current status of this field. Second, deep learning methods have revolutionized many fields including autonomous navigation. Therefore, it is necessary to give an appropriate treatment of the role of deep learning in autonomous navigation as well which is covered in this paper. Future works and research gaps will also be discussed.

Published
2022

7. Effective adoption of vehicle models for autonomous vehicle path tracking: a switched MPC approach.

Author

Rokonuzzaman, Mohammad, Mohajer, Navid, and Nahavandi, Saeid

Subjects
*VEHICLE models, *FUZZY logic, *FUZZY systems, *PREDICTION models, *AUTONOMOUS vehicles
Abstract

Efficient path tracking plays a key role in the overall ride experience of Autonomous Vehicles (AVs). Model Predictive Control (MPC) is one of the most competent techniques which is capable of handling multiple variables and constraints. The performance of this controller heavily relies on the proper choice of the vehicle model used to predict future states. This work proposes a novel MPC framework for the effective adoption of vehicle models to achieve a compromise between MPC's performance and computational cost. To this aim, a Switched MPC (SMPC) using vehicle models with different levels of complexity and fidelity is developed. The SMPC uses a novel supervision scheme to adopt the appropriate vehicle model based on the models' prediction error and MPC's solution time. Two different configurations of SMPC are implemented: (1) A Fuzzy Logic System (FLS), and (2) An adaptive switching supervisor. The outcomes show that both approaches can perform path tracking accurately on roads with varying curvatures for different AV speeds. Moreover, comparisons with the conventional MPCs show that the proposed controllers can perform comparably with selective use of a complex vehicle model. Notably, they benefit from a higher computation efficiency from sidestepping the most complex models during path tracking. [ABSTRACT FROM AUTHOR]

Published
2023
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17. Drivers and Barriers to Industrial Energy Efficiency in Textile Industries of Bangladesh

Author

Hasan, A. S. M. Monjurul, Rokonuzzaman, Mohammad, Tuhin, Rashedul Amin, Salimullah, Shah Md., Ullah, Mahfuz, Sakib, Taiyeb Hasan, Thollander, Patrik, Hasan, A. S. M. Monjurul, Rokonuzzaman, Mohammad, Tuhin, Rashedul Amin, Salimullah, Shah Md., Ullah, Mahfuz, Sakib, Taiyeb Hasan, and Thollander, Patrik

Abstract

Bangladesh faced a substantial growth in primary energy demand in the last few years. According to several studies, energy generation is not the only means to address energy demand; efficient energy management practices are also very critical. A pertinent contribution in the energy management at the industrial sector ensures the proper utilization of energy. Energy management and its efficiency in the textile industries of Bangladesh are studied in this paper. The outcomes demonstrate several barriers to energy management practices which are inadequate technical cost-effective measures, inadequate capital expenditure, and poor research and development. However, this study also demonstrates that the risk of high energy prices in the future, assistance from energy professionals, and an energy management scheme constitute the important drivers for the implementation of energy efficiency measures in the studied textile mills. The studied textile industries seem unaccustomed to the dedicated energy service company concept, and insufficient information regarding energy service companies (ESCOs) and the shortage of trained professionals in energy management seem to be the reasons behind this. This paper likewise finds that 3-4% energy efficiency improvements can be gained with the help of energy management practices in these industries.

Published
2019
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20. Assessing Impact of Large Scale Integration of Wind and Solar PV Power Generation on Small Signal and Transient Stability

Author

Hoq, Md Tanbhir, Murad, Mohammed Ahsan Adib, Rokonuzzaman, Mohammad, Hossain, Nusrat, Hoq, Md Tanbhir, Murad, Mohammed Ahsan Adib, Rokonuzzaman, Mohammad, and Hossain, Nusrat

Abstract

One imperative challenge in building a sustainable electricity future is to integrate renewable energy sources in the present energy mix. Renewable energy sources are inherently different in nature from their conventional counterparts. Thus integration to existing system posses a substantial challenges. In this paper using a IEEE 14 bus test system the effect of large scale and distributed integration of wind and solar PV on power system stability is assessed using PSAT. Both small signal and transient stability are studied with varying amount of renewable energy in the system. From the simulation results, it is observed that the small signal stability degrades with higher renewable energy penetration, and the transient frequency and voltage response of the system worsens as well with higher renewable energy in the system, but nonetheless the systems in different scenarios remains stable despite having poor damping., QC 20191025

Published
2018
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25. Engineering a Suburban Ad-Hoc Network

Author

Tyson, Mike, Pose, Ronald. D, Kopp, Carlo, Rokonuzzaman, Mohammad, and Mahmudul Islam, Mohammad

Subjects
Computer System Architecture
Abstract

Proceedings of 7th Australian Information Warfare and Security Conference, Edith Cowan University, Perth Western Australia, 4th - 5th December, 2006, Networks are growing in popularity, as wireless communication hardware, both fixed and mobile, becomes more common and affordable. The Monash Suburban Ad-Hoc Network (SAHN) project has devised a system that provides a highly secure and survivable ad-hoc network, capable of delivering broadband speeds to co-operating users within a fixed environment, such as a residential neighbourhood, or a campus. The SAHN can be used by residents within a community to exchange information, to share access to the Internet, providing last-mile access, or for local telephony and video conferencing. SAHN nodes are designed to be self-configuring and selfmanaging, relying on no experienced user intervention. Thus, they are suitable for use by the general public, in ‘plug-and-play’ fashion. This paper investigates possible architectures for an implementation of the SAHN (Tyson 2005), and presents a real-world prototype. The prototype presented takes the form of a Linux kernel module, and a user-space daemon.

Published
2006
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