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Testing Autonomous Vehicles in Virtual Environments: A Review of Simulation Tools and Techniques Uzzaman, Asif; Islam, Monirul; Hossain, Md Shimul
Control Systems and Optimization Letters Vol 3, No 2 (2025)
Publisher : Peneliti Teknologi Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59247/csol.v3i2.196

Abstract

Autonomous vehicles (AVs) have the potential to transform the transportation industry by improving road safety, reducing traffic congestion, and enhancing fuel efficiency. Significant progress has been made in autonomous vehicle (AV) technologies, especially in sensor systems, machine learning, and artificial intelligence. These advancements enable vehicles to navigate complex environments and make real-time decisions. Despite these advancements, numerous challenges remain in ensuring the safety, reliability, and acceptance of AVs. Key issues include sensor fusion, the ability to handle unpredictable scenarios, the development of universally accepted regulatory frameworks, and public trust in autonomous systems. Furthermore, ethical dilemmas, such as decision-making in unavoidable accident situations, present additional concerns. The deployment of AVs also raises questions about the impact on employment in driving-dependent industries and the infrastructure needed to support these technologies. This paper reviews the current state of AV development, examining the progress made in simulation-based testing, sensor technology, and decision-making algorithms. Additionally, it discusses the challenges that still need to be addressed, including safety concerns, regulatory barriers, and societal implications. The paper concludes by outlining potential areas for future research, such as improving sensor reliability, enhancing machine learning algorithms, integrates an analysis of simulation-based testing, decision-making algorithms, and sensor technologies with a forward-looking discussion on legal frameworks, public trust, and employment impacts, offering a holistic perspective on the path toward AV integration.
Design and Optimization of Structural Parameters of Hydraulic Retarder Blades Hossain, Md Shimul; Jiaxin, Wang; Merda, Md Ruqul
Control Systems and Optimization Letters Vol 4, No 1 (2026)
Publisher : Peneliti Teknologi Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59247/csol.v4i1.291

Abstract

Hydraulic retarders are auxiliary braking devices in heavy-duty vehicles where rotor blade structural integrity directly affects system reliability and safety. Under operational conditions, blades experience combined centrifugal and fluid pressure loading, making geometric optimization essential to prevent stress concentration and deformation failure. This study employs finite element analysis to conduct a systematic parametric investigation of rotor blade design. Four key parameters—blade number (32-36), thickness (3-5 mm), wedge angle (35°-50°), and material (structural steel, AISI 4140, aluminum bronze, CFRP)—were evaluated under identical operating conditions (2000 rpm rotational velocity, 0.5 MPa uniform pressure). Equivalent stress, deformation, strain, and safety factor were used as comparative metrics. Results demonstrate that geometric optimization significantly outperforms material addition in improving structural performance. The optimized configuration achieves substantially enhanced safety margins while maintaining deformation within elastic limits. Material comparison identifies AISI 4140 as offering the optimal balance of strength and stiffness. These findings provide quantifiable design guidance for hydraulic retarder development and establish a systematic optimization framework applicable to rotating machinery components.