Browsing by Author "Khan, Sheroz"

Now showing 1 - 3 of 3
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    Analysis of Hybrid Stepper Motor Performance under the Influence of Voltage Supply Interference
    (IIUM Press, International Islamic University Malaysia, 2011-11-06) Salami, Abdulazeez Femi; Lawal, Wahab Adetunji; Khan, Sheroz; Gunawan, T. S.; Jarot, S. P. W.
    This work investigates the effects of voltage supply interference on the performance of hybrid stepper motor. MATLAB Simlink is used to model the power supply, sinusoidal interfering signal, stepper motor driver circuit and the hybrid stepper motor. This stepper motor is using a DC Voltage supply of 28 volts and it is a two-phase motor with a step angle of 1.8o. The different simulation scenarios that is explored in this work are for a; noiseless power supply, low frequency-low amplitude noise operating at 50 hertz and 1 volts, low frequency-high amplitude noise operating at 50 hertz and 5 volts, high frequency-low amplitude noise operating at 200 hertz and 1 volts and high frequency-high amplitude noise operating at 200 hertz and 5 volts.
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    Feasibility Analysis of Clustering Routing Protocols for Multipurpose Sensor Networking
    (Intelligent Information Technology Application Research Association (IITA Association), 2010-09-29) Salami, Abdulazeez Femi; Bari, S. M. S.; Anwar, Farhat; Khan, Sheroz
    Recent advances in wireless sensor technology have led to the evolvement of new protocols specially designed for wireless sensor networks. Current wireless sensor network routing protocols are based on the assumption that all sensor nodes are monitoring a single global event. However, in many scenarios, it is desirable to use a single sensor network to monitor multiple events. This will not only reduce the cost of deploying and administering the sensor nodes but it will also improve the management and efficiency of the entire sensor network. Cluster-based routing protocols for large-scale wireless sensor networks are more suitable for multipurpose sensor networking scenario because clustering minimizes the number of messages that are propagated throughout the network whenever an event is sensed. In this paper, an investigation of selected clustering routing protocols for wireless sensor networks is presented together with a highlight of their key features and their ability to adapt to multipurpose sensor networking.
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    Piece-wise Linear Analog to Digital (PLADC) Converter Process
    (IIUM Press, International Islamic University Malaysia, 2011-11-06) Salami, Abdulazeez Femi; Lawal, Wahab Adetunji; Khan, Sheroz; Zahirul Alam, A. H. M.
    In today’s automation systems transducers are making core elements in the instruments and the circuits used for measurement, control and industrial applications. The task of a transducer is to reproduce a physical quantity as an electrical signal which with the help of conditioning circuits, is transformed into a form that suits a corresponding ADC requirement before a digital equivalent output of the required physical quantity is produced. In the most ideal cases a digital quantity is a true replica of the physical quantity when the transducer has got a linear response. However, in most of the cases the transducers characteristics are nonlinear, and hence at very points along the whole range of the transducer characteristics, the corresponding digital output is an exact replica of the concerned physical parameter. This work is about how a physical read more accurately in the case of nonlinear sensor characteristics, and then a microcontroller is programmed with the same technique while reading from an input over the entire range. The data of the microcontroller reading shows very closely matched with the actual sensors response. Further, the reading error is considerably reduced to within 10 % of the actual physical which shows the utility of the technique in very sensitive applications.