Showing posts with label Mechanical Engineering Seminar Topic. Show all posts
Showing posts with label Mechanical Engineering Seminar Topic. Show all posts

Saturday, February 8, 2014

Mini Projects List of Mechanical Engineering Seminar Topics

Mini Projects List of Mechanical Engineering Seminar Topics


  1. PATH FINDER ROBOT
  2. MOTORISED OBJECT LIFTING JACK
  3. KEY CONTROLLED- FORK LIFTER
  4. MATERIAL HANDLING (X, Y, Z MOTION CONTROL)
  5. GEARED MOTOR CONTROL WITH SELECTED STEPS FOR CONVEYOR BELT
  6. CONVEYOR BELT OBJECT REJECTION & COUNTING MACHINE
  7. ROBOTIC ARM WITH GRIPPER
  8. ROBOTIC CRANE
  9. VEHICLE TROLLEY FOR MATERIAL HANDLING
  10. VEHICLE CAR WITH SENSORS
  11. LINE TRACER INDUSTRIAL VEHICLE
  12. VEHICLE FIRE BRIGADE TROLLEY
  13. VEHICLE LIFT ESCALATOR
  14. DRIVER LESS CAR
  15. AMPHIBEAN ROBOTIC CAR

Friday, February 7, 2014

Mini Project - MOTORISED OBJECT LIFTING JACK

MOTORISED OBJECT LIFTING JACK

Abstract:

For many people robot is a machine that imitates a human—like the androids in Star Wars, Terminator and Star Trek: The Next Generation. However much these robots capture our imagination, such robots still only inhabit Science Fiction. People still haven't been able to give a robot enough 'common sense' to reliably interact with a dynamic world. The type of robots that you will encounter most frequently are robots that do work that is too dangerous, boring, onerous, or just plain nasty. Most of the robots in the world are of this type. They can be found in auto, medical, manufacturing and space industries. In fact, there are over a million of these types of robots working for us today. A study of robotics means that students are actively engaged with all of these disciplines in a deeply problem-posing problem-solving environment.

Line follower is a machine that can follow a path. The path can be visible like a black line on a white surface (or vice-versa) or it can be invisible like a magnetic field. Sensing a line and maneuvering the robot to stay on course, while constantly correcting wrong moves using feedback mechanism forms a simple yet effective closed loop system. As a programmer you get an opportunity to ‘teach’ the robot how to follow the line thus giving it a human-like property of responding to stimuli. The one more feature in this application there is an object lifting jack works with the help of geared motors and worm gear arrangement to lift the objects,if detected.


Mini Project - PATH FINDER ROBOT

PATH FINDER ROBOT


Abstract:

For many people robot is a machine that imitates a human—like the androids in Star Wars, Terminator and Star Trek: The Next Generation. However much these robots capture our imagination, such robots still only inhabit Science Fiction. People still haven't been able to give a robot enough 'common sense' to reliably interact with a dynamic world. The type of robots that you will encounter most frequently are robots that do work that is too dangerous, boring, onerous, or just plain nasty. Most of the robots in the world are of this type. They can be found in auto, medical, manufacturing and space industries. In fact, there are over a million of these types of robots working for us today. A study of robotics means that students are actively engaged with all of these disciplines in a deeply problem-posing problem-solving environment.

Line follower is a machine that can follow a path. The path can be visible like a black line on a white surface (or vice-versa) or it can be invisible like a magnetic field. Sensing a line and maneuvering the robot to stay on course, while constantly correcting wrong moves using feedback mechanism forms a simple yet effective closed loop system. As a programmer you get an opportunity to ‘teach’ the robot how to follow the line thus giving it a human-like property of responding to stimuli.

The main heart of the hardware module is the microcontroller which is the programmable IC. The programming language used for developing the software to the microcontroller is Embedded/Assembly. The KEIL cross compiler is used to edit, compile and debug this program. Micro Flash programmer is used for burning the developed code on Keil in to the microcontroller Chip. Here in our application we are using AT89C51 microcontroller which is Flash Programmable IC.AT represents the Atmel Corporation represents CMOS technology is used for designing the IC. This IC is one of the versions of 8051.

Wednesday, October 16, 2013

Fuel efficiency in AWD - System

Fuel efficiency in AWD - System

Abstract :

This degree project has been made in cooperation with engineers working for GM Engineering/Saab Automobile AB in Trollhättan. The given name by Saab for the project is “Fuel efficiency improvements in All Wheel Drive(AWD)-system”. The main tasks of this thesis work were to investigate the size of the power losses in different parts on the propeller shaft, to design a computer program that calculates coordinates and angles on a propeller shaft and to investigate the possibilities to put together a simplified formula that calculates the natural frequencies on a propeller shaft.

The main parts of this report are a compilation of the theory about AWD and mostly about the parts on the propeller shaft, and also a description of the developed computer program called Propeller Shaft Calculator. This report doesn’t concern power losses in the different joints because there were no such general equations to be found. The most common way to calculate the power losses inside a joint is to do tests were the power loss is measured at different angles, torque and speed and then use that data to put together an approximated equation.
Most of the work on this project has been on theory studies and on programming.

Simulation Of Thermal Stresses In a Disc Brake


Simulation Of Thermal Stresses In a Disc Brake

Abstract :

The heat flux produced from the friction between a disc and pad system leads to a high temperature which causes thermal stresses in the disc and after a number of repeated braking cycles, cracks might be initiated. The finite element analysis (FEA) is performed to determine the temperatures profile in the disc and to analyze the stresses for the repeated braking, which could be used to calculate the fatigue life of a disc.

Sequentially coupled approach is used for thermo-mechanical problem and the problem is divided into two parts, heat analysis and thermal stress analysis. The heat analysis is obtained by including frictional heat and adopting an Eulerian approach. The heat analysis is conducted by using Abaqus and the toolbox developed by Niclas Strömberg. The thermal stress analysis, which is the main focus of this thesis, is followed using Abaqus. The plasticity theory as background for stress analysis is discussed in detail. The rate independent elasto-plastic plasticity is used in the stress analysis. Temperature independent material properties are considered throughout the thesis work.

Isotropic, kinematic and combined hardening models are analyzed for simple 2D academic models for different types of cyclic loads. A benchmark disc and pad model, which is less complicated than the real disc-pad model, is also studied. The linear kinematic hardening model with rate independent elastic-plastic plasticity is used for benchmark and real disc-pad model. The results of the benchmark model and the real model are observed to be similar in terms of plasticity theory.

Automatic Design Of Wiring Pattern For Car Seat Heaters


Automatic Design Of Wiring Pattern For Car Seat Heaters

Abstract :

This projects aims to develop design automation in product development. Design automation
causes increase in producibility and decrease in product cost and manufacturing lead time.

The study at hand is proposed to provide a new method and to introduce procedure to the design of wiring pattern for a car seat heater for Kongsberg Automotive, KA. KA is a Norwegian company and a global provider of engineering, design, and manufacture for seat comfort, driver and motion control systems, fluid assemblies, and industrial driver interface products. The method that currently is used in the company to create a wiring pattern is neither sufficient enough nor automated.
In order to design the wiring pattern, at first procedure is handled by the designer. Secondly, car
seat heater 2D layout is imported and then, the dimensions of the elements are defined as
constraints. Then VBA codes are opened and the program is run. The result will be a wiring
pattern in different 2D layouts. To make the design process easier, we have modeled five different layouts; wiring pattern of one element, two elements, three elements, five elements (with two back sides) and one element trapezoidal 2D layout.

The algorithm written in VBA (Visual basic for application) creates the pattern according to the
dimensions of the elements which are used as inputs to define constrained parameters. The created macros are simple to use and easy to modify, independent from the programming knowledge. The user is only responsible with parameter input and running the program. The solution gives wiring pattern for a car seat heater.

CFD Measurements of the Cooling Air in a DC-Motor


Latest Mechanical Engineering Seminar Topic on CFD Measurements of the Cooling Air in a DC-Motor

 Abstract :

The cooling system of a DC-motor is examined in this thesis. A change of direction of the
cooling air is desired to prevent the generated coal dust from entering into the windings of the
machine. Ultimately this will have a negative effect on the cooling in the machine and the loss
of cooling needs to be compensated through other ways. The purpose of this thesis is to work
for an improved operational safety and performance of the DC-motor and to make it more
competitive in the market. By modelling the interior geometry of the machine and defining
the boundaries in the software programs Gambit and FLUENT respectively, the motion and
the heat transfer of the airflow could be simulated. The simulation results would give us an
understanding of the flow pattern which later could be used to develop design modifications
on the cooling system of a DC-motor. In this thesis the main focus lies on creating a
simulation model with a sufficiently fine mesh size.




Summary :

The cooling system in a certain rotating machine of the type direct current (DC-) motor is
examined in this thesis. In a DC-motor there is coal dust generated at the connecting surfaces
between a stationary part where the electric current is inserted to the rotor (the Brushes) and
the adjoining rotating surface (the Commutator). This dust is sucked in through the windings
of the machine when the airflow is going from the non-drive side of the machine, which is the
most common nowadays, and this dust is causing a lot of damage. The idea investigated in
this thesis is to drive the airflow through the machine from the opposite side, the drive side,
and by doing so also avoid getting the dust into the machine. From a thermodynamic point of
view though this is less efficient and the deterioration of the cooling should be counteracted
by improving the cooling in other ways. The purpose is to work for an improvement of the
operational safety and the performance of the DC-motor and to make it more competitive in
the market.

The first and main goal with this thesis work was to create a simplified model of the DCmotor
that simulates the flow and heat transfer of the cooling air through the system. This
model could then be used to analyze the airflow through the machine. By examining different
properties of the cooling air it would eventually lead to a better understanding of the general
motion and heat-transfer pattern of the air in the system. The final objective would have been
to use the simulation model and the knowledge of the patterns in the fluid to develop design
modifications in the machine that would improve the cooling. Unfortunately this goal was
never reached because of the complexity of the task and time limitation of the thesis.
For the building up and the simulation of the created models the software programs Gambit
and FLUENT were used. First of all a simple 2D model version was made to give us an
overview of what kind of problems that could occur during modelling and simulation. A cross
section segment of the Commutator was modelled and simulation results of the velocity and
temperature in the airflow were generated from it. From those results it was noted that there
was a short cutting airflow along the outer wall where cold air went directly from the inlet to
the outlet passage, and another flow closer to the Commutator wall that was circulating in a
vortex formation distributing the heat from the surface to a larger area.

The main modelling work was put on a 3D-model of the DC-motor with sizes of geometry
and mesh parametrisized. Since the modelling was rather complex it was delimited to include
just the Commutator part of the machine. Further it was necessary to systemize the geometry
building to get a higher level of control and this was accomplished by defining the whole
geometry in Python script which would generate a Gambit journal file when compiled. In the
Python script the geometry was divided into three separate sections, each projected onto a
general radial plane, and there after extruded stepwise in the axial direction. The formed
volumes could then be activated or deactivated from its mesh according to the conditions in
the machine which is reproduced. Because of the structure in the axial direction it is possible
to use prism-shaped mesh cells in each section and thereby decrease the number of mesh cells needed. All the volumes containing air were meshed and simulated as well as one solid
volume, the copper layer on the Commutator surface where axial heat conduction occurs.
Further the turbulence model used here was the k-omega model. It was chosen because it was
more convenient since you are able to use both a near wall function and a function for the
wall roughness for the same surface.


Friday, February 1, 2013

Robotic Car

Robotic Car Abstract:


We're pretty familiar with autonomous cars around here, and we've even been treated to a ride in one of Stanford's robots at their automotive innovation lab, which they launched in partnership with Volkswagen. You might also remember Shelley, their autonomous Audi TTS, which autonomously raced to the top of Pikes Peak last year. Volkswagen's thinking behind all of this high performance autonomous car stuff is that at some point, they'll be able to program your car to be a far, far better driver than you could ever be, and it'll have the ability to pull some crazy maneuvers to save you from potential accidents.
Google, who's just down the road from Stanford, seems to understand this, and they've turned their autonomous cars up to "aggressive" in this driving demo that they gave to some lucky sods in a parking lot at the TED conference in Long Beach. It's pretty impressive: This might seem dangerous, but arguably, this demo is likely safer than a human driving around the parking area at normal speeds, if we assume that the car's sensors are all switched on and it's not just playing back a preset path. The fact is that a car equipped with radar and LIDAR and such can take in much more information, process it much more quickly and reliably, make a correct decision about a complex situation, and then implement that decision far better than a human can.
This is especially true if we consider the type of research that is being done with Shelley to teach cars how to make extreme maneuvers, safely. So why aren't we all driving autonomous cars already? It's not a technical ; there are several cars on the road right now with lane sensing, blind spot detection and adaptive cruise control, which could be combined to allow for autonomous highway driving. Largely, the reasons seem to be legal: there's no real framework or precedent for yielding control of a vehicle to an autonomous system, and nobody knows exactly who to blame or sue if something goes wrong.
Robotic Car - Mechanical Engineering Seminar List
And furthermore, the first time something does go wrong, it's going to be like a baseball bat to the face of the entire robotics industry. Anyway, enough of the depressing stuff, here's an outside view of Google's robot car squealing around that parking lot: For what it's worth, "aggressive" is apparently one of four different driving personalities that you have the option of choosing from every time to start up one of their robot cars.

Automatic Air Suspension


Automatic Air Suspension


Air ride suspension carries the load on each axle with a pressurized air bag much like a high pressure balloon. Air ride suspension systems have been in common use for over forty years and have proven to provide the smoothest and most shock-free ride of any known vehicle suspension system. Modern air bags are constructed using the same methods as a tire by using high strength cords which are then encapsulated in rubber. These units are very durable in service and have a proven life of many years.

In addition to providing extremely smooth ride quality, air ride suspension also provides other important features. First, the system automatically adjusts air pressure in the air bag so that the trailer always rides at the same height, whether lightly loaded or heavily loaded. This allows the suspension system to always provide the maximum usable wheel travel independent of trailer load. In addition, the higher air bag pressure associated with higher trailer loads, automatically provides a stiffer suspension which is exactly what is required for a smooth ride. The lower air bag pressure for lightly loaded conditions, automatically provides for a softer suspension, thus providing the same ride quality for all trailer loading conditions. Since each axle is independently supported by its own air bag, the air ride suspension is a truly, fully independent suspension system.

The automatic control of the air bag pressure is accomplished by a solid state electronic control system specifically designed and packaged for vehicle use. This system continuously monitors the "ride height" of the trailer suspension and increases air pressure if the ride height is too low, by turning on an on-board air compressor. The air compressor stops automatically when the proper ride height is reached. If the ride height is too high, an automatic vent valve vents excess air pressure and stops venting when the proper ride height is reached. All required electrical power is provided by a 12 volt battery contained in the trailer equipment compartment

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