- BS/BA: Mechanical Engineering
- MS: Mechanical Engineering
- PhD: Mechanical Engineering
- Phone: 82883358
- Fax: 88005040
- Email: m.moghadam@modares.ac.ir
- Resume Download
Current and Past Graduate Students Ph.D Candidates | M.A.Sc. Candidates | Summer Students | Past Graduates Ph.D. Candidates: Javad Ehyaei
Dynamic Modeling of an Imbalanced Flexible Rotor Equipped with n Automatic Ball-Balancer
Advisor:Dr. Majid M. Moghaddam
Dynamic modeling is studied for a system of a flexible rotor equipped with n automatic ball-balancer where the imbalance masses are distributed in the length of the rotor. The Stodola-Green rotor model, of which the rotor is flexible, is considered for analysis. The rotor model includes the influence of rigid body rotations, due to the shaft flexibility. Utilizing Lagrange’s method for the rotor with ABBs, the nonlinear equations are investigated. The results of the paper may be used for considering dynamic stability and time responses of the above system. It is shown that the results validate for a two ADB rigid rotor system.
Email:jehyaei@gmail.com
Shahram Shahriari Design of an H-infinity-based Control of a Satellite with Control Moment Gyro
Advisor:Dr. Majid M. Moghaddam and Dr. Azadi
A control moment gyro (CMG) is a device used as an actuator for attitude control of satellite. It generates torques through angular momentum transfer to and from the main satellite body. This is achieved by changing the direction of the angular momentum vector of a gimballed flywheel. A cluster of CMGs is used to produce a three dimension attitude control of satellite. Future space mission require agile satellite with accurate attitude control in the present of large amount of uncertainty, vibration of solar panel and other flexible appendage. Design of a robust controller is an obligation for such a system. Email:s_shahriari2000@yahoo.com
Mohammad R. Tafti Mechanical Force Model of Physically Realistic Haptic Simulation of Bone Dissection
Advisor:Dr. Majid M. Moghaddam and Dr. Ali Nahvi and Dr. M. Mahvash This work develops a detailed mechanical force modeling of spherical rotating burrs for bone cutting in haptic applications such as temporal bone surgery or dentistry. The cutting edges of the tool are analyzed as a series of infinitesimal cutting elements. Each cutting element in contact with bone material undergoes an orthogonal cutting process. The feed rate affects the chip thickness, which is the most dominant factor in our force prediction. We have also included parameters such as tool rotational speed and the number of cutting edges in predicting the force. The result is a more realistic force model than those currently used in haptic rendering of bone surgery simulators. Email:ARBAB@modares.ac.ir
Mohammad R. Fazel Robust Hinfinity Identification of a Mobile Robot
Advisors:Dr. Majid M. Moghaddam and Dr. Javad Poshtan This work will identify the moving platform robot first from conventional methods and then apply the robust control-oriented identification algorithms to it for comparison and acheiving new aspects.
Email:mfazel@yazduni.ac.ir
Mohamad M. Sheikhi On Design and Manufacturing of an Active Magnetic Bearing System
Advisors:Dr. Jousef Hojjat and Dr. Majid M. Moghaddam The levitation system is a nonlinear system to levitate the rotor magnetically without any contact. The active magnetic bearing system consists of four electromagnetic actuators called stator and rotor and eight gap sensors and a PID system control. No primary information of the system is needed for the controller to behave robustly. The magnetic field’s effect, the iron core saturation and the magnetic couplings between electromagnets of the radial magnetic bearing are studied. Email:m_sh_1971@yahoo.com
M.A.Sc. Candidates:
Amin Touhidi
2007 Summer Students:
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