design brochure 08
TRANSCRIPT
Master of Technology in
DESIGN OF MECHANICAL EQUIPMENT
(BATCH OF 2007-2009)
Department of Mechanical Engineering Indian Institute of Technology, Delhi
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INTRODUCING ‘DESIGN OF MECHANICAL EQUIPMENT’
“Design of Mechanical Equipment” also known as “Machine Design” has historically occupied a prominent position in the curriculum of mechanical engineering and emphasizes on methods of engineering problem solving as related to design, analysis and deployment of man-machine interfaces. Design of Mechanical Equipment is one of the most competitive P.G. programmes in the country with candidates selected in IIT Delhi having rank up to 200 in GATE exam. The tough competition ensures that only the best engineering talent, possess-ing a good academic record throughout their universities and colleges get the opportu-nity to be a part of this programme. On joining here, ♦ The design of programme leads to hands on training on a range of machine design
methods not available in specialized programs like ITMMEC, IDDC and analysis based programmes like Applied Mechanics.
♦ The courses in this program have integral laboratory practice, leading to thorough grounding in problem solving practice in the field.
♦ Teaching Assistantship work (TA) work is a part of the program in all programs in IIT Delhi. We have chosen to mentor the students through close association with faculty through teaching assistance in practicals, projects and other administrative activities. This gives them exposure beyond the classroom level.
I hope that you will have time to go through the brochure attached that de-scribes their training and project in more detail. I hope that you will consider them for opportunities commiserate with their training and capabilities. Regards,
Program Coordinator Prof. Sudipto Mukherjee
MASTER OF TECHNOLOGY IN
DESIGN OF MECHANICAL EQUIPMENT
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Course Content 1 Laboratories 4 Students Profile 5 Faculty Profile 12 Softwares Used 13 Past Recruiters 14 Contacts 15
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Vibration Engineering Introduction to unwanted mechanical vibrations and their harmful effects including those on human beings. Vibration control strategies and case studies. Experimental and theoretical routes to vibration engineering. Vibration Testing. Spatial, Modal and Response models of vibrating systems. Lumped parameter and dis-tributed parameter modeling of mechanical vibratory systems. Free vibrations and Forced response solu-tions of Single- and multi- degree- of-freedom models including modeling of damping. Applications of nu-merical procedures to determine natural frequencies and mode shapes. Finite Element Method for dy-namic analysis. Distributed parameter models of rods, bars and beams. Vibration control solutions. Bal-ancing of rotating and reciprocating machines. Design of vibration isolators. Auxiliary mass systems in-cluding tuned dampers for vibration control. Application of damping treatment for vibration control in ma-chines and structures. Dynamic instability control. Introduction to Modal testing, model updating and struc-tural dynamic modification to improve dynamic design of machine structures. Active control of vibrations. Introduction to NVH and its control. Advanced Mechanical Engineering Design Introduction to Advanced Mechanical Engineering Design. Review of materials & processes for machine elements. Case studies of mechanical engineering design failures. Review of static strength failure analy-sis-theories of failure including vonMises theory based strength design. High cycle and low cycle fatigue. Fatigue Strength Design of Mech. Equipment Elements. Exercises of fatigue design of shafting and gears. Surface fatigue design failures. Exercises of surface fatigue design of rolling contact bearings including linear bearings. Stiffness based design. Design for creep. Combined creep and fatigue failure prevention. Design to prevent buckling and instability. Tribodesign with applications to design of sliding bearings and mechanical seals. Selection of lubrication systems. Design for corrosion, wear, hydrogen embrittlement, fretting fatigue and other combined modes of mechanical failure. Dynamically sound designs of machine elements like springs and shafts. Introduction to dynamic design of mech. equipment and its implementa-tion. Computer Methods in Mechanical Design Introduction and overview. Need and Scope of Computer Aided Machine Design. Role of Geometric Mod-eling, FE and Optimization; Principles of interactive computer graphics, and overview of hardware avail-able for use in CAD; Geometric transformations and Projections. Windowing and view-porting; Geometric modeling; Modeling of curves, cubics, splines, beziers and b-splines; Modeling of surfaces; Modeling of solids–b-rep, CSG, octree, feature based modeling; Introduction to the Finite Element Method, principle of potential energy; 1D elements, Derivation of Stiff-ness and Mass matrices for a bar, a beam and a shaft, Comparison with Analytical results; Solution of static problems and case studies in stress analysis of mechanical components; FEA using 2D and 3D ele-ments; Plain strain and plain stress problems, FE using plates / shell elements; Importance of Finite ele-ment mesh, Automatic meshing techniques; Interfacing with CAD software, Case studies using FEM for Design of simple element geometries such as a tapered bar, a plate with a hole and a spanner; Introduc-tion to Dynamic analysis; Limitations of FEM, Introduction to Non-linear problems and FEA for plastic ma-terials. Practicals: Practice of transformation. Use of CAD Package for developing typical objects using Boolean, and sweep operations on primitives, use of CAD models for other applications. Development of FEM models for Static / Dynamic analysis of a bar, beam and a shaft. Practice in using an FEM Software on other real life problems like spanners, connecting rods etc. Robotics Review of serial robotic manipulators. Classification of parallel robots (Stewart platform, wheeled mobile robots, walking machines, etc.). Algorithms for inverse and forward kinematic/dynamic analyses of parallel robots. Kinematic design of serial and parallel robots based on singularity, workspace, manipulability, dex-terity, etc. Mechanical design of robot links and joints. Introduction to control of robotic systems. Practi-cals: Experiments with existing robots.
COURSES
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COURSES
Design of Mechanisms and Manipulators Classification of closed- and open-loop kinematic systems, Definition of mechanisms and manipula-tors, Kinematic constraints, Degree of freedom (DOF) and Mobility; DH parameters, Coordinate trans-formations, Matrix methods; Structural analysis and synthesis of mechanisms; Forward kinematics of robot manipulators with examples; Inverse kinematics; Jacobian and singularity; Alternative design solutions of mechanisms and manipulators; Evaluation and selection of optimum mechanism; Type and number synthesis, Design of mechanisms; Indexes of merit; Graphical, Algebraic and Optimiza-tion techniques; Design of function, path, and motion generators; Dynamic considerations, Rigid body dynamics, Newton-Euler formulation, Equations of motion; Methodologies for inverse and forward dy-namics. Practicals will include numerical problem solutions; Basic practices in MATLAB, ADAMS and ULTRAGRIP software; Analysis and Synthesis using software. Instrumentation and Automatic Control Systems Classification and representation of control systems. Influence of type of control on steady state and transient response. Time and frequency domain analysis. Stability analysis using Routh & Nyquist cri-teria. Root locus method. Modern Control theory. Sequence control and programmable logic control-lers. Control components, Comparators, hydraulic, pneumatic and electrical types of controllers, ser-vomotors. Electromechanical and electro-optical transducers and control elements. Signal conditioning and indicating / recording elements. Computer based data acquisition systems , A-D and D -A convert-ers. Microprocessor applications in measurement and control. Static and dynamic analysis of instru-ment systems. Signal and systems analysis. FFT analyzers. Current developments in measurement and control of motion, force, torque, pressure, temperature, flow, noise etc. Virtual instrumentation, Laser Based instrumentation. Practicals: Static and dynamic behavior of some important transducers, calibration procedure, Development of Computer aided experimentation systems. Experimental stud-ies on Hydraulic, Pneumatic, Electrical controller, Electromechanical actuators. Optimum Design of Mechanical Systems Introduction to Optimum design of Mechanical Systems. Need of optimization of preliminary design by identification of design requirements and by use of appropriate design strategy. Introduction to detail design optimization by simulation, prototyping and optimum selection of configuration, materials and processes. Mechanical System Design problem-economic political environment, issues of human safety & welfare, and professional ethics. Optimum mechanical design concepts. Overview and appli-cation of optimization methods to machine elements and mechanical system design. Prototyping, simulation, and use of standards for detail design optimization. Optimum selection of material & proc-esses in mechanical design using material selection charts and optimization methods. Optimizing product design functionality, aesthetics and economics by employing industrial design principles and by suitable selection of material & processing including use of polymers, composites and other non metallic materials. Design for Noise Vibration and Harshness Fundamentals of Vibrations and their manifestations in real life systems. Review of Design of a Vibra-tion Absorber. Vibration Reduction Measures, Unconstrained and constrained layer damping treat-ment, add on dampers, and stiffeners. Changing the dynamic characteristics of a structure, Structural dynamics modification. Predicting the modification (dynamic design) Design of Isolators in machine foundations. Role of materials damping. Balancing of rotating machinery. Rigid and flexible rotor bal-ancing. Active Vibrations control. Introduction of wave analysis of structures and spaces. Characteris-tics of Duct and Cabin Noise. Stationary modes. Random noise. Measures of a sound acoustic d sign, importance of reverberations time. Various types of acoustic testing chambers. Noise measurement and control instruments. Sound Intensity Mapping Noise isolation design. Noise absorber design. De-sign of silencers, mufflers.
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Multibody System Vibration Design Definition of multibody systems, Introduction to rigid, Multibody dynamics, Virtual work, Euler-Lagrange and Orthogonal complement approaches to derive the dynamic equations of multibody sys-tems; Dynamics of flexible-body system, Modeling with flexible bodies; Mode shapes, modal analy-ses; Discrete and finite element modeling; Introduction to modal updating, Technique of correlation of analytical and experimental models. Experimental Modal Analysis & Dynamic Design Introduction to modal testing. Dynamic test data measurement and processing methods. Frequency response functions for multi degree of freedoms systems, forced response. Experimental and theo-retical modal analysis - algorithms and codes. Applications of modal testing in system and force iden-tification, structural dynamic modification, sensitivity analysis and frequency response coupling of substructure etc. Introduction to non-linear vibration analysis. Introduction to discrete systems and finite element modeling. Comparison of numerical data with test results. Introduction to model updat-ing, Techniques of correlation of analytical and experimental models. Dynamic design of mechanical equipment structures via model testing, structural dynamic modification and model updating. Finite element methods Method of weighted residuals and variational approach for solving differential equations. Galerkin and Rayleigh-Ritz methods. Finite element method and implementation. Convergence criterion. Finite element formulation for linear elastic continuum and extended Laplace equation including inertia and dissipative terms. Substructuring. Co-elements including isoparametric elements. Plate bending and ‘C’ elements. Non-conforming elements and patch test. Dynamic and nonlinear problems. Finite Ele-ment formulation-problems involving initial stress and initial strain. Axisymmetric problems-classical solution. Finite Element solution of free vibration problems. Principles of transient dynamic analysis. Laboratory work for the solution of solid mechanics problems using FE packages. Fracture mechanics Linear elastic fracture mechanics, Energy and stress intensity factor approach. General yielding frac-ture mechanics. Concept of crack opening displacement and J integral fracture criteria. Evaluation of fracture mechanics parameters. Fracture safe designing of structures and machine components. Ser-vice failure analysis. Machine Tool Design Design requirements of machine tools. A design approach for machine tools. Identification and quan-tification of objectives and constraints in machine tool design. Estimation of power requirements and selection of motor for metal cutting machine tool spindles. Design of gearbox, spindle and guideways. Principles of design of structural components, namely, head stock, tail stock, carriage, table, knee, column and overarms to achieve desired static & fatigue strength, stiffness, dynamic characteristics and other requirements. Exercises on the design of machine tools using existing CAD software pack-ages. Introduction to computer integrated manufacturing systems and CNC machine tools. Design/selection of linear motion systems, ball, screws, CNC feedback devices, controllers, feed drives and servomotors for CNC machine tools. Recent developments in CNC and other machine tools.
COURSES
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LABORATORIES Design Research Lab Modal Analysis and NVH, Dynamic Design and Model Updating, Inverse dynamic analy-sis, Scanning Laser Doppler Vibrometer, LMS 8 channel system. Softwares - ICATS, FEM TOOLS, PIMENTO TEST LAB, CES, ANSYS.
◄ Modal Testing of fan at Design Research Lab
Mechatronics & Manipulators Lab Dynamic Design Of Flexible Robot Manipulator & Intelligent Robot, Haptic manipulator, Intelligent Conveyor System, X-Y Table. Softwares - IDEAS, RIDIM, RECURDYN, MSC ADAMS. Scorbot at Mechatronics Lab ►
Mechanisms Lab Study of mechanisms & their principles, Balancing Experiments, Gyroscope, Gov-ernor, Coriolis Acceleration Set-up, 4 Cyl-inder IC engine vibration test rig, Various Gear Train Experiment.
Impact Simulation Lab Accident Reconstruction, Automotive CRASH modeling both four wheelers & two wheelers, Design for vehicle Safety, Air Bag Simulation, Pedestrian Impact, Human Body Material Characterization, Softwares - PAM CRASH/SAFE, LSDYNA, MADYMO, PC CRASH, HYPERMESH, ANSYS, RADIOSS. Air bag simulation at Impact Lab ►
Vibration Research Lab Rotor/Gear Dynamics, Static and Dynamic Balancing, Prognosis of Rotors, Modal Analy-sis of Rotors, LMS system, Active/Passive Vibration Control Softwares - ProE, LabVIEW, MATLAB
◄ Dynamic Testing Machine at Vibration Research Lab
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STUDENTS PROFILE Ninad P. Kulkarni [email protected] M.Tech. project : Dynamic Analysis Of Geared Rotor Systems
The dynamic behavior of a geared rotor system is not only dependant on mass imbalance as in case of simple rotor systems, but it involves contribution of many other complicated factors. The analysis of geared rotor systems involves - ♦ Study of factors affecting dynamics of geared rotor systems, such as Mesh
stiffness variation, Backlash, Damping, Tooth errors, Friction etc. ♦ Establishing mathematical model of the system. ♦ Dynamic response analysis (unbalance & transient) of the model using FE
method. ♦ Extending the study to condition monitoring of geared rotor systems i.e.
predicting faults in gear teeth like crack, surface crater etc. from the vibration response.
Ganesh R. Kakade [email protected] M.Tech. project: Pedestrian-Car Crash Reconstruction and Injury Correlation
♦ Objective of work is to develop a methodology
to simulate real life pedestrian car accidents and correlate injury predictions with known injury data.
♦ Pedestrian-Car accidents data collection at Birmingham Automotive Safety Centre, University of Birmingham, UK.
♦ Estimation of kinematics of pedestrian by simulation of accidents in MADYMO software.
♦ Use of this kinematics results for head injury correlation by head impact simulation in Radioss/Pam-crash software using ULP head model.
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STUDENTS PROFILE Praveen Kumar Singh [email protected] M.Tech. project : Design of two de-gree of freedom Haptic Device
Aim is to design a Haptic device for simulating a medical procedure like epidural injection and medi-cal training to see, touch and manipulate realistic models of biological tissues and organs. Creation of such a system would include • Mechanism with desired degree of freedom, low-
complexity. • Providing singularity free zones, good ergonomics
and comfort ♦ Superior and known performance characteristics
such as computational efficiency, higher stiffness, stability.
Gaurav Singh [email protected] M.Tech. project: Studies in Operational Modal Analysis of Me-chanical Structures
The objectives of present work are:- ♦ To perform operational modal
analysis of simple structure and its comparison with experimental mo-dal analysis and finite element analysis.
♦ To perform operational modal analysis of automotive substruc-tures.
♦ To attempt operational modal analysis under operating conditions.
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STUDENTS PROFILE Jagdish M. [email protected] M.Tech. project: Electro-Magnetic Controller For Rotor Vibration Control
This project proposes an active vibration control scheme for controlling transverse vibration of a rotor shaft due to unbalance and presents a theoretical and experimental study. The technique uses electromagnetic exciters mounted on the stator at a plane, in general away from the conventional support locations, around the rotor shaft for applying suitable force of actuation over an air gap to control transverse vibration. Suitable force of actuation is achieved by varying the control current in the exciters depending upon a proportional and derivative control law applied to the displacement of the rotor section fed back by pick-ups with respect to the non-rotating position of the section taken as the reference.
Priti Yadav [email protected] M.Tech. project: Finite element analysis of knee joint prostheses.
Total knee replacement (TKR) has long been the standard operation to relieve pain and restore range of motion to knee joints damaged by osteoarthritis. But the major problem associated with TKR is implants cost and their life. From the current available knee implants it has been forecasted that frequency of revision surgery will be 270 thousand per year by 2030.With the increment in the knee replacements every year the need for the knee prostheses are increasing not only in quantity but also in quality in terms of the life of knee implants. To achieve this goal this project is aimed to review finite element analysis of natural knee as well as knee prostheses under different daily routine (walking, stair raising etc.) loading cycles.
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STUDENTS PROFILE Madhava Krishna Tippa [email protected] M.Tech. project : Identification of Dynamic Forces Using Modal Analysis
The knowledge of dynamic forces in a me-chanical system subject to operational excitations is beneficial from the as-pects of design, control and diagnosis of the system. There are a great num-ber of engineering problems where direct measurement of forces is not possi-ble. Under such conditions, the dynamic forces are estimated by using meas-ured responses from vibration sensors mounted on the structure. The project work intends to develop a model of force identification technique to identify dynamic forces (e.g. harmonic, periodic and impact) acting on arbitrary struc-tures using measured responses, and also to study the relative performance of the widely used techniques for force identification in frequency domain.
Purna Chandra Rao Kommuru [email protected] M.Tech. project: Dynamic Analysis of Multistage Bladed Disc Systems
This project work deals with dynamic behavior of multistage bladed disc rotor. The rotor may have several bladed discs on the shaft, with each disc contain-ing fairly large number of blades. The blades may be pretwisted, tapered and staggered, with aerofoil section. Study of vibration in multistage bladed disc is as follows:
♦ Calculation of normal modes and natural frequencies for individual compo-nents and complete rotor, by using any FEM software (ANSYS).
♦ The calculated natural frequencies obtained for the blade, the shaft, the bladed discs are to be analyzed to discover the resonance conditions and coupling effects.
♦ Investigate the effect of shaft flexibility on the dynamic characteristics of the bladed discs and the coupling effects between the shaft and bladed disc modes.
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STUDENTS PROFILE Monojit kumar Choudhury [email protected] M.Tech. project : Finite Element Model Updating and Dynamic Design of Spot Welded Structures
♦ Many structures in mechanical engineering which involve thin
metal sheets are fabricated by spot welding process. Such structures are widely used in automobiles and transportation industries.
♦ Due to many spot welds that go in the fabricated structures the modeling of these spot welds has a great influence on the dynamics of the entire spot-welded structures.
♦ The current work attempts to find out the degree of co-relation that exists be-tween the numerical models of such spot welded structures with that of dynamic test.
♦ To improve the accuracy of the numerical model to represent the results from dynamic test which will be done by model updating. This will be followed by structural dynamic modified studies using updated model.
Sridhar Vanka [email protected] M.Tech. project: Active Vibration Control Of Rotors
The objective of the present work is to control the transverse vibration response of a rotor-shaft and increase the stability limit speed of the system by applying based on nominal position fed back by proximity pick-ups. Similarly experiments would be carried. This work has been attempted by modeling the rotor material with the internal material damping to predict the stability limit speed. Finite element method is used to discretize the continuum and write the equations of motion.
SPOT WELD MODEL
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STUDENTS PROFILE Ramakrishna Reddy Y. [email protected] M.Tech. project : Analysis and Design of a Magnetorheological Fluid based Squeeze Film Damper with Feedback Control
It is commonly known that about 80 to 90% of high speed rotating machinery use ball bearings due to its light weight, low friction, and ease in its installation, except inherent damping characteristics. In order to impart good damping to ball bearings, squeeze film dampers (SFD) based on magnetorheological fluid (MRF) can be efficiently utilized. Use of MRF in SFD offers variable damping charac-teristics due to change in its rheological behavior by externally applied mag-netic field.
Ajay Yadav [email protected] M.Tech. project: Condition Monitoring Of Gear Box
Conditioning monitoring seeks to monitor the health of the machine by taking vibration, acoustics, and temperature measurements. During operation, each element contributes to the overall vibration of the machine. Following steps are involved in condition monitoring of gear box: ♦ Need of condition monitoring and study of causes for the defects in gears. ♦ Experiments on the gear test rig setup with the help of sensors and
software. ♦ Use of various techniques (frequency domain analysis) to analyze the
experimental results such as Frequency Spectrum, Cepstrum Analysis, Wavelet technique etc.
♦ Analyze the results to get the location of the defect and take proper remedial action.
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STUDENTS PROFILE Chintala Kranthi Teja [email protected] M.Tech. project : SHPB For Bones
Side impact crashes are identified to be taking place at high strain rates and shoulder bones are critical in side impact crashes and their dynamic proper-ties at these strain rates are not characterized. For the safety of vehicles and prevention of devastating fractures in side impact crashes the dynamic prop-erties of shoulder bones need to be characterized. So for characterizing dy-namic mechanical properties of bones SHPB technique is selected. Objectives: ♦ Characterization of dynamic mechanical properties of shoulder bones us-
ing SPLIT HOPKINSON PRESSURE BAR Technique. ♦ To identify the effect of Variation in mechanical properties at different loca-
tions on shoulder bones. ♦ Developing simulations to observe the behavior of the response of shoul-
der bones using dynamic properties. Vinay Kumar Khemka [email protected] M.Tech. project: Conceptual design of an Omni-directional walking simu-lator
The aim of this project is to evaluate technolo-gies, techniques, and strategies for using virtual environment for combat training and to design a locomotion interface proto-type. The focus of the virtual environment system is training and mission re-hearsal. Thus following analysis and processes are involved in this project. ♦ Identification and study of design issues and dynamic behavior of a motion
platform ♦ Prototype development of the motion platform ♦ Study of various controlling aspects and developing a control scheme that
allow the user to walk naturally on the platform ♦ Development and Implementation of the controlling programs on the proto-
type
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FACULTY
Prof. Anoop Chawla
Ph.D. IIT Kanpur Research Interest-CAD, CAE, Dynamics, Bio- Mechanics, AI and Expert Systems for Design and Manufacturing
Dr. Subodh V. Modak
Ph.D. Research Interest-Finite Element Model Updating, Modal Analysis, Vibration.
Dr. Ashish K. Darpe
Ph.D. IIT Delhi Research Interest-Condition Monitoring, Rotor Dynamics, Vibration
Prof. Sudipto Mukherjee
Ph.D. Ohio State Univ., U.S.A. Research Interest-Mechanical System Design, Computer Controlled Mechanisms, Dynamics, Biomechanics.
Dr. Jayant K. Dutt
Ph.D. Research Interest-Rotor Dynamics, Vibration and Control.
Dr. Rahul Ribeiro
Ph.D. Texas A&M University Research Interest-Biomaterials, Tribology, Tis-sue Properties.
Prof. Kshitij Gupta
Ph.D. Research Interest-Vibrations, Mechanical Design, Rotor Dynamics, Composite Materials.
Prof. S. K. Saha
Ph.D. McGill Univ., Canada Research Interest-Robotics and Mechanisms & Multibody Dynamics
Prof. T. K. Kundra
Ph.D. Research Interest-Mechanical System Design, Concurrent Engg, Vibration Design, CAD/CAM, Finite Element Model Updating
Prof. S. P. Singh
Ph.D. Research Interest-Dynamics of Rotating Machinery, Composite Materials, Machine Design, Active Vibration Control.
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SOFTWARES
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PAST RECRUITERS
Head of Department, Mechanical Engineering, Prof. J.P. Subrahmanyam, Room No. 265, Block II, Tel: +91‐11‐2659 6139, Fax: +91‐11‐2658 2053, [email protected].
Programme Coordinator, M. Tech Design of mechanical equipment, Prof. S. Mukherjee, Room No. 430, Block II, Tel: +91‐11‐26559 1138, Fax: +91‐11‐2658 2053, [email protected]
Student Coordinator, Vinay Kumar Khemka, Tel: 09953079225, [email protected]
CONTACTS