Habib Mahmoud - Academia.edu (original) (raw)
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Papers by Habib Mahmoud
Proceedings of International Conference on Control Applications, 1995
Active control has been pursued vigorously to combat thermoacoustic instabilities in combustion p... more Active control has been pursued vigorously to combat thermoacoustic instabilities in combustion processes. Despite the success reported in experimental investigations, a systematic procedure by which active control can be designed and implemented is currently not available. In this paper, we discuss the active control of a premixed combustor. The model structure in the presence of a loudspeaker and a microphone
International Journal of Optics and Photonic Engineering, 2019
Beam shaping technique is applied to design optical lenses for transforming uniform beams to diff... more Beam shaping technique is applied to design optical lenses for transforming uniform beams to diffraction-free Bessel Beams. One-lens and two-lens refracting system will be demonstrated where the lens' surfaces equations can be easily derived. The designed lenses take the input uniform beam distribution and confine it to be within the main lobe of the Bessel beam and avoid its zeros crossings. Various design parameters such as the power of the beam and the optical system length will be discussed. It will be demonstrated that the two-element design will produce smaller system length than the one-element design.
Proceedings of International Conference on Control Applications, 1995
Active control has been pursued vigorously to combat thermoacoustic instabilities in combustion p... more Active control has been pursued vigorously to combat thermoacoustic instabilities in combustion processes. Despite the success reported in experimental investigations, a systematic procedure by which active control can be designed and implemented is currently not available. In this paper, we discuss the active control of a premixed combustor. The model structure in the presence of a loudspeaker and a microphone
International Journal of Optics and Photonic Engineering, 2019
Beam shaping technique is applied to design optical lenses for transforming uniform beams to diff... more Beam shaping technique is applied to design optical lenses for transforming uniform beams to diffraction-free Bessel Beams. One-lens and two-lens refracting system will be demonstrated where the lens' surfaces equations can be easily derived. The designed lenses take the input uniform beam distribution and confine it to be within the main lobe of the Bessel beam and avoid its zeros crossings. Various design parameters such as the power of the beam and the optical system length will be discussed. It will be demonstrated that the two-element design will produce smaller system length than the one-element design.