munaliza ibrahim - Academia.edu (original) (raw)
Papers by munaliza ibrahim
Periodica polytechnica. Transportation engineering, Feb 20, 2024
The pantograph is an essential component that provides electrical contact between the overhead wi... more The pantograph is an essential component that provides electrical contact between the overhead wires and the electric train. The quality of the current collection in high-speed trains is directly influenced by the mechanical interaction between the pantograph collector head and the overhead contact line. To overcome these challenges and improve pantograph performance, researchers and engineers have explored innovative solutions, including the introduction of active control mechanisms. Excitation by the vehicle is one of the normal disturbances in the dynamic interaction of the pantograph and the overhead line. The vertical effects of vehicle-track vibrations on the interaction between the pantograph and the overhead contact line have not yet been adequately researched. To fill this research gap, this study establishes models for both the pantograph-catenary interaction and the vehicle-track system. In this study, the performance of the modified Skyhook-Proportional-Integral-Derivative (PID) controller was investigated for a half-body of a railway pantograph-catenary system. Track irregularities such as step, sine, and random were applied to perturb the suspension system. The performance of both passive and active systems was investigated by considering the track irregularities as a basis. The root mean square analysis (RMS) found that active displacement control of pantograph-catenary systems for a half-body railway model equipped with modified Skyhook-PID controllers performed better than the passive systems. In summary, the future experimental approach for active half-body railway model could incorporate this simple modification of the Skyhook-PID controller.
Jurnal teknologi, Aug 20, 2023
The aim of this work is to determine the effectiveness of active suspension control systems in im... more The aim of this work is to determine the effectiveness of active suspension control systems in improving the ride quality of railway vehicles. A 13-degrees-of-freedom (DOF) full-body model is provided, including lateral, yaw, and rool motions of the body and bogies, and lateral displacement of the four wheelsets. The suspension system of railway vehicles and the dynamics of track irregularities are combined in a set of governing equations. MATLAB/Simulink is used to build a full-body dynamics model of a rail vehicle. The effectiveness of the active suspension systems equipped with the suggested controller has been tested for the purpose of evaluating its performance. Compared to passive systems, the results showed a more than 60 % improvement in vehicle performance on irregular tracks.
![Research paper thumbnail of Experimental and analysis of vehicle dynamics performance based on driving behavior / Mohd Azman Abdullah... [et al.]](https://attachments.academia-assets.com/96575388/thumbnails/1.jpg)
](Faculty of Mechanical Engineering Universiti Teknologi MARA (UiTM), 2017
Most of the time, the dynamic performances of a vehicle is depending on the driving behavior of t... more Most of the time, the dynamic performances of a vehicle is depending on the driving behavior of the driver. The driving behavior can be analyzed from the way they control the vehicle during cornering, accelerating, braking and driving through uneven roads. This paper presents the vehicle dynamics performance analysis based on driving behavior among teenagers' drivers. The analysis was concentrated on how they handle the vehicle that can be seen from the values of moments consists of roll, pitch and yaw and accelerations (vibrations) at x, y and z axes. From the data collected, the dynamic performances of the vehicle were analyzed based on the driving behavior. It can observed that, the aggressive drivers produced significant values in moments and accelerations especially roll moment and vertical acceleration. Significant values in moments and vibrations can compensate the safety part of the driving and serious accident may occur
Periodica polytechnica. Transportation engineering, Feb 20, 2024
The pantograph is an essential component that provides electrical contact between the overhead wi... more The pantograph is an essential component that provides electrical contact between the overhead wires and the electric train. The quality of the current collection in high-speed trains is directly influenced by the mechanical interaction between the pantograph collector head and the overhead contact line. To overcome these challenges and improve pantograph performance, researchers and engineers have explored innovative solutions, including the introduction of active control mechanisms. Excitation by the vehicle is one of the normal disturbances in the dynamic interaction of the pantograph and the overhead line. The vertical effects of vehicle-track vibrations on the interaction between the pantograph and the overhead contact line have not yet been adequately researched. To fill this research gap, this study establishes models for both the pantograph-catenary interaction and the vehicle-track system. In this study, the performance of the modified Skyhook-Proportional-Integral-Derivative (PID) controller was investigated for a half-body of a railway pantograph-catenary system. Track irregularities such as step, sine, and random were applied to perturb the suspension system. The performance of both passive and active systems was investigated by considering the track irregularities as a basis. The root mean square analysis (RMS) found that active displacement control of pantograph-catenary systems for a half-body railway model equipped with modified Skyhook-PID controllers performed better than the passive systems. In summary, the future experimental approach for active half-body railway model could incorporate this simple modification of the Skyhook-PID controller.
Jurnal teknologi, Aug 20, 2023
The aim of this work is to determine the effectiveness of active suspension control systems in im... more The aim of this work is to determine the effectiveness of active suspension control systems in improving the ride quality of railway vehicles. A 13-degrees-of-freedom (DOF) full-body model is provided, including lateral, yaw, and rool motions of the body and bogies, and lateral displacement of the four wheelsets. The suspension system of railway vehicles and the dynamics of track irregularities are combined in a set of governing equations. MATLAB/Simulink is used to build a full-body dynamics model of a rail vehicle. The effectiveness of the active suspension systems equipped with the suggested controller has been tested for the purpose of evaluating its performance. Compared to passive systems, the results showed a more than 60 % improvement in vehicle performance on irregular tracks.
Faculty of Mechanical Engineering Universiti Teknologi MARA (UiTM), 2017
Most of the time, the dynamic performances of a vehicle is depending on the driving behavior of t... more Most of the time, the dynamic performances of a vehicle is depending on the driving behavior of the driver. The driving behavior can be analyzed from the way they control the vehicle during cornering, accelerating, braking and driving through uneven roads. This paper presents the vehicle dynamics performance analysis based on driving behavior among teenagers' drivers. The analysis was concentrated on how they handle the vehicle that can be seen from the values of moments consists of roll, pitch and yaw and accelerations (vibrations) at x, y and z axes. From the data collected, the dynamic performances of the vehicle were analyzed based on the driving behavior. It can observed that, the aggressive drivers produced significant values in moments and accelerations especially roll moment and vertical acceleration. Significant values in moments and vibrations can compensate the safety part of the driving and serious accident may occur