Particle kinematics and kinetics, systems of particles, work-energy, impulse and momentum, rigid-body kinematics, relative motion, Coriolis acceleration, rigid-body kinetics, direct and oblique impact, eccentric impact.
The principles of dynamics as applied to the analysis of the accelerations and dynamic forces in machines such as linkages, cam systems, gears trains, belts, chains and couplings. The effect these dynamic forces have on the dynamic balance and operation of the machines and the attending stresses in the individual components of the machines. Some synthesis techniques. Students also work in teams on a semester long project associated with the design of a mechanical system from recognizing the need through a detailed conceptual design.
Application of the principles of strength of materials to the analysis and design of machine parts. Stress and deflection analysis. Curved bars, multi-support shafts, torsion, cylinders under pressure, thermal stresses, creep, and relaxation, rotating disks, fasteners, springs, bearings, gears, brakes and other machine elements are considered. Failure of structural materials under cyclic stress.
Analysis and synthesis of feedback control systems to achieve specified stability and performance criteria, stability via root-locus techniques, Nyquist's criterion, Bode and Nichol's plots, effect of various control laws and pole-zero compensation on performance, applications to servomechanisms, hydraulic and pneumatic control systems, analysis of nonlinear systems.
An introduction to using a computer system to aid in engineering design, fundamental components of hardware and software; databases and database management, numerical control and computer-aided manufacturing. Integration of manufacturing system from conceptual design through quality control to final shipping is discussed. Applications include solids modeling, CAD drawing and solution using finite element method.
Concepts of energy, heat and work; thermodynamic properties of substances and property relationships, phase change; First and Second Laws for closed and open systems including steady and transient processes and cycles; using entropy; representative applications including vapor and gas power and refrigeration cycles.
Dr. Yazan Manna joined the faculty as a Lecturer in the Mechanical Engineering Department at Stevens. He is teaching in the general areas of Machine design, Mechanisms and Machinery Dynamics, Thermal Engineering, Computer Aided Design (CAD), and Computer Aided Engineering (CAE).
Research & Education
He earned his Ph.D in Mechanical Engineering in 2010 at NJIT with his dissertation entitled “Motion Coordination and Control in the Development of a Gait Rehabilitation System.”
The Ph.D research involves the design of a gait pattern generation module which consists of a pair of close chain linkage mechanisms. This module provides coordinated movement of the hip and knee joints according to normal physiological gait pattern. The research developed unique methods for the motion control and coordination of the pair of linkage mechanisms. One method controls the input crank of the linkage mechanism directly with servomotors based on a derived continuous motion profile. Another method achieves both timing and coordination through mechanical means so that the system works under a simple speed control. Features of this system include: improving gait training safety, consistent training, and being labor saving.
He also holds a M.S in Mechanical Engineering in 2005 at NJIT with his research on “A Gait Generation Mechanism for Leg Rehabilitation Therapy”. He also holds a B.Sc in Mechatronics Engineering from The Hashemite University in Jordan. Before he went to continue his higher education, he worked as an internal sales engineer and as a design engineer in Jordan.
His research interests include: Rehabilitation Systems Development, Biomechanics, Computer Aided Design and mechatronics.
Yazan A. Manna, Fen Du, Zhiming Ji. (Jul 2012). "Motion Control and Coordination in the Development of a Gait Rehabilitation System", Journal of Mechanical Engineering Science, Proceedings of the Institution of Mechanical Engineers. 226 (7), 1885-1895.
Zhiming Ji, Yazan A. Manna. (Dec 2008). "Size Minimization of Disk Cams with Roller-Followers under Pressure Angle Constraint", Journal of Mechanical Engineering Science, No. C12, ISSN 0954-4062. 222 2475-2484.
Zhiming Ji, Yazan Manna. (Sep 2008). "Synthesis of a Pattern Generation Mechanism for Gait Rehabilitation", Journal of Medical Devices, Paper #031004. 2 (3).