
Mhia Md. Zaglul ShahadatRajshahi University of Engineering and Technology · Department of Mechanical Engineering
Mhia Md. Zaglul Shahadat
PhD
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42
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Introduction
IoT based Intelligent System
Publications
Publications (42)
Vertical axis wind turbines (VAWT) are suitable for low wind speed regions like Bangladesh, as they require low initial torque. Hence, in recent years, researchers have prioritized maximizing energy harvesting potentials from VAWTs at low wind speeds. With a view to maximizing the power output of the lift-based H-Darrieus VAWT, this research numeri...
Due to serious flaws in the Wired Equivalency Protocol (WEP), the Wi-Fi Protected Access (WPA) and WPA2 Wired Local Area Network (WLAN) security protocols were developed. Because of recent studies showing that WPA security can be broken in less than an hour given enough computing power, therefore WPA is supplemented by WPA2, which is required for u...
The presentation file for the 17th Annual Paper Meet of Mechanical Engineering (APMME) 2023
Voice over Internet Protocol (VoIP) technology enables users to place phone calls over an Internet Protocol (IP) network. It is becoming an increasingly significant component of our daily life as it is a very simple and inexpensive method of data transmission. The authors have fabricated a VoIP system with particle photon and MAX9814 as microcontro...
Presentation file for 5th International Conference on Mechanical, Industrial and Materials Engineering (ICMIME 2022)
Since 1990s, telephone has been the primary mode of communication. However, Voice over Internet Protocol (VoIP) which is a highly straightforward and affordable form of data transfer, is now becoming an important part of daily communication.VoIP is the technology that makes it possible to send speech and multimedia data packets across either a publ...
Presentation file for 4th International Conference on Energy and Power (ICEP2022)
Since 1990s, telephone has been the primary mode of communication. However, Voice over Internet Protocol (VoIP) which is a highly straightforward and affordable form of data transfer, is now becoming an important part of daily communication. VoIP is the technology that makes it possible to send speech and multimedia data packets across either a pub...
This paper presents the isolation of vibration through the acceleration feedback of the Kalman filter. In this paper, vibration isolation was analyzed both analytically and experimentally through the estimation of the Kalman filter (KF). A negative stiffness mechanism was used to reduce the level of vibration for the developed dynamic system. The t...
This paper presents the design, fabrication, and performance test of a magnetic bearing employing no active components. In this study, the magnetic bearing was fabricated using a magnetic edge effect. Four large and three small hollow Neodymium (Nd) magnets were used of the same thickness, same internal diameter but different outer diameters. Small...
With the advancement of science and technology in the last few decades, the increasing demand for electricity is ineluctable. This phenomenon is further being alarming as energy resources are depleting at a high rate. Efficient renewable energy harvesting technologies should be the solution to face this difficulty. Harvesting wind energy can serve...
Liquefied Petroleum Gas (LPG) is used in many ranges of applications like home and industrial appliances, in vehicles and as a propellant and refrigerator. However, leakage of LPG produces hazardous and toxic impact on human begins and other living creatures. There by, the authors developed a system to monitor the LPG gas leakage and make alert to...
Voice coil motors (VCM) are direct drive, limited motion devices that use permanent magnet and coil winding (conductor) to produce a force proportional to the applied current. Voice coil motors are mostly used as linear actuators. This paper presents the design and fabrication of a distinctive voice coil motor to be used in tactile sensing devices....
These days cyberattack is a serious criminal offense and it is a hotly debated issue moreover. A man-in-the-middle-attack (MITM) is a kind of cyberattack where an unapproved outsider enters into an online correspondence between two users, remains escaped the two parties. The malware that is in the middle-attack often monitors and changes individual...
These days cyberattack is a serious criminal offense and it is a hotly debated issue moreover. A man-in-the-middle-attack is a kind of cyberattack where an unapproved outsider enters into an online correspondence between two users, remains escaped the two parties. The malware that is in the middle-attack often monitors and changes individual/classi...
This paper deals with a single-axis zero-compliance horizontal system in
which the displacement cancellation technique has been employed to
develop the system. The both theoretical and experimental analyses
regarding the developed system have been conducted. The displacement
cancellation technique possesses the characteristic of zero-compliance in...
This paper portrays the benefits of introducing an ultracapacitor into a battery pack of an urban electric vehicle drive train. Simulations are done taking two basic scenarios into consideration: fresh cells and half-used battery cells. The simulations show that the lower the temperature higher the hybrid system efficiency. Data from real world are...
This paper focuses on compatibility of zero-compliance and zero-power characteristics in a single system. To realize such compatibility, a horizontal zero-compliance system is developed, in which a zero-power controlled voice coil motor is connected with a normal spring (positive stiffness) in series. Since the zero-power control results zero-curre...
In this paper, a decentralized low-cost water treatment plant is designed using empirical equations. From the analysis of water quality of Bangladesh, it is seen that the standard level of water quality is not maintained in Bangladesh. First, the primary treatment plant is designed including septic tank and anaerobic pond design. But only primary p...
The dynamic displacements of micro vibration isolation systems still need to be suppressed because the precision accuracies in Hi-tech manufacturing industries have currently progressed to nanometer. In this study, the dynamic behavior of a vibration isolation system using a negative stiffness controller is further improved by additional accelerati...
A vibration isolation system based on parallel-mechanism is developed. The responses of the developed system against a disturbance are investigated analytically and experimentally. The developed system consists of six individual vibration isolation units of single degree-of-freedom which are placed in parallel between a common vibration isolation t...
Two vibration control techniques, negative stiffness and displacement cancellation, are characterized and employed to achieve active vibration isolation. A horizontal vibration isolation system is developed and then used to investigate each of these techniques theoretically and experimentally. The respective responses of the developed system are me...
The effect of friction on a negative stiffness control system is investigated. The negative stiffness control system is used to obtain zero compliance needed for a vibration isolation system. However, the performance of a negative stiffness control system is significantly affected by friction. In this paper, the friction-induced limit cycle in a ne...
A virtually zero-power and zero-compliance mechanism is presented in this paper. A zero-compliance system using an integral control accompanies power consumption to cancel disturbances on the system. On the other hand, systems using a zero-power control can avoid power consumption at steady-state. However, the zero-power control causes a negative d...
A horizontal vibration isolation system using negative stiffness control technique is realized. The developed vibration isolation system consists of isolation table and middle table. In negative stiffness control technique, the isolation table is driven by negative stiffness controlled actuator and the middle table is driven by positive stiffness c...
The effect of friction on a negative stiffness control system is investigated. The series combination of isolators of negative and positive stiffness of equal magnitude provides infinite stiffness as well as zero compliance of the vibration isolation table against direct static load. However the performance of negative stiffness control system is a...
A three-degree-of-freedom (3-DOF) active vibration isolation system using vibration cancellation technique is presented in this paper. The disturbance cancellation concept is put into action to design the controller as well as to eliminate the displacement of the isolation table respect to the base under static load. The corresponding controller is...
Realizing an active horizontal suspension system using negative stiffness for attenuating the effect of direct disturbance to the isolation table is presented in this paper. The inclination of the suspension system causes dislocation of the suspended table. The vibration isolation characteristics of the proposed active system controlled by negative...
The objective of the present study is to save the conventional primary energy resources and to reduce overall exhaust emission of compression ignition (CI) engine simultaneously. To obtain the objective, it was emphasized on finding out a potential non-edible vegetable oil for providing raw material of biodiesel production and to adopt this biodies...
Concern of environmental pollution and energy crisis all over the world have caused the research attention on reduction of IC engine exhaust emissions and saving of energy simultaneously. This investigation mainly focuses on reducing exhaust emission and energy saving by investigating diesel combustion with neat diesel fuel and a new attachment of...
In this report combustion and exhaust emissions with neat diesel fuel and diesel–biodiesel blends have been investigated. In the investigation, firstly biodiesel from non-edible neem oil has been made by esterification. Biodiesel fuel (BDF) is chemically known as mono-alkyl fatty acid ester. It is renewable in nature and is derived from plant oils...
In this report diesel combustion and exhaust emission with neat diesel fuel and diesel-biodiesel blends is investigated. In the investigation, first, the making of biodiesel is done by esterification and second, experiment is conducted with neat diesel fuel and diesel-biodiesel blends in a four stroke naturally aspirated (NA) direct injection (DI)...
The diesel engine exhausts are of many types and of them oxides of nitrogen (NOx), particulate matter (PM), total unburnt hydrocarbon (THC) is responsible for atmospheric pollution. Many research and development works have been done in recent year for the reduction of diesel engine emissions. In the present investigation fuel combustion and exhaust...