Members of Vibrations and Acoustics Lab
Undergraduate Students
1. Project: Smart Pump
Project: In Punjab, electricity that is provided free of cost for irrigational purposes is usually misused and diverted. The wastage of
electricity leads to an erratic power grid and unreliable power supply and the wastage of water have led to declining water tables (the
problem has reached alarming levels).Thus, a project aimed to develop a system to tackle these issues keeping the socio-economic
factors in mind was planned and initiated.The system would be such that it discourages wastage of water and electricity. A “Smart
Pump” mechanism (for water metering and pumping) was developed in order to check and regulate the usage of water and electricity
for irrigation by farmers.
The proposed system intends to give farmers a “Water Balance” for a fixed period of time. The farmer can use his/her quota of water
during the fixed period. As and when the allotted quota is used up, the electric connection to the pump is cut off. The connection is
re-established when the “Water Balance” is recharged. The recharge can be only done after the fixed period thus encouraging
judicious use of the allotted water balance thereby checking wastage.
The prototype of the system was developed for the first phase of the project (September 2011 – April 2012)and the next phases will be
worked upon by the current students of IIT Ropar.
2. Project:Energy harvesting using smart materials
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The project focussed on energy harvesting using Smart Materials. Our method was three-fold
1. Modelling: We used a commercially available FEA software - Abaqus to model a unimorph beam. By giving appropriate boundary
conditions and excitations, we were able to calculate the voltages produced by the system.
2.Experimentation: The same unimorph beam was fabricated in the Noise and Vibration Lab using an Aluminum beam and excited
according to particular frequencies using a base shaker
3. Theoretical Calculations: The natural frequencies of vibration of the beam were calculated theoretically and implemented on the
shaker
In totality, all three methods were employed and graphs of voltage vs frequency were obtained.The model accurately characterised the
physical and theoretical model and satisfactory results were obtained.
1. Modelling: We used a commercially available FEA software - Abaqus to model a unimorph beam. By giving appropriate boundary
conditions and excitations, we were able to calculate the voltages produced by the system.
2.Experimentation: The same unimorph beam was fabricated in the Noise and Vibration Lab using an Aluminum beam and excited
according to particular frequencies using a base shaker
3. Theoretical Calculations: The natural frequencies of vibration of the beam were calculated theoretically and implemented on the
shaker
In totality, all three methods were employed and graphs of voltage vs frequency were obtained.The model accurately characterised thephysical and theoretical model and satisfactory results were obtained.
3. Project:Modeling and Simulation of 3-Phase Induction Motor in
MATLAB
Three phase squirrel cage induction motors occupy around 80% of the total motor requirement in
the market due to its versatility and ease of operations. They are reliable, efficient and cost saving
but still various faults such as the broken rotor bar(s) fault, variable power supply fault, unequal
rotor resistances fault, eccentricity, etc. do occur. Thus, to reduce the Mean Time to Repair
(MTTR)/Breakdown of these machines, we have focused our research on diagnosing these faults in
their 'formative stages' so that
preventive/corrective actions can be taken in time.
By developing healthy and faulty models of a three-phase squirrel cage induction motor in MATLAB©, we are able to predict the
deviations that would be generated in the current signatures (Motor Current Signature Analysis) of faulty motors. This method helps us in
analyzing real time data for the detection of these faults.
Softwares Used - MATLAB© , SIMULINK©
Machine being worked upon - 'Machine Fault Analysis'
preventive/corrective actions can be taken in time.
By developing healthy and faulty models of a three-phase squirrel cage induction motor in MATLAB©, we are able to predict the deviations that would be generated in the current signatures (Motor Current Signature Analysis) of faulty motors. This method helps us in
analyzing real time data for the detection of these faults.
Softwares Used - MATLAB© , SIMULINK©
Machine being worked upon - 'Machine Fault Analysis'
4. Project:Noise Barriers
Project: Increasing noise pollution will lead to an ever increasing need to control noise of all forms. Noise barriers are the most common
solution for controlling noise in surroundings and several methods have been developed for improving their efficiency without
increasing their height. So we have to suggest a most suitable design considering all parameters ( material, height , width, etc.)
of noise barrier and constraints(light weight, cost, etc.) which can be deployed to the baffle range of TBRL(DRDO) so that maximum
sound attenuation can be achieved by considering both acoustical and non-acoustical parameters.
solution for controlling noise in surroundings and several methods have been developed for improving their efficiency without
increasing their height. So we have to suggest a most suitable design considering all parameters ( material, height , width, etc.)
of noise barrier and constraints(light weight, cost, etc.) which can be deployed to the baffle range of TBRL(DRDO) so that maximum
sound attenuation can be achieved by considering both acoustical and non-acoustical parameters.
5. Faults in an Induction Motor
Project:Analysis of healthy motor and various faults that are inherently present or some that develop with continuous use of motor
under heavy loads which includes faults like Broken Rotor Bars,Unequal Supply Voltage,Stator Winding Fault,Rotor Winding
Fault,Eccentricity Rotor ,Stator Bearing fault etc. using Matlab and Simulink.The MCSA (Motor Current Signature Analysis) is also
found and studied for the healthy and various faulty induction motors present in the setup of Machinery Fault Simulator.
Software used ;- 1 Matlab 2 Simulink
under heavy loads which includes faults like Broken Rotor Bars,Unequal Supply Voltage,Stator Winding Fault,Rotor Winding
Fault,Eccentricity Rotor ,Stator Bearing fault etc. using Matlab and Simulink.The MCSA (Motor Current Signature Analysis) is also
found and studied for the healthy and various faulty induction motors present in the setup of Machinery Fault Simulator.
Software used ;- 1 Matlab 2 Simulink
6. Investigation of Faulty Gears
Project:Investigation of Faulty Gears using Vibration Analysis and Mathematical modelling.
7. Pass-by Noise Reduction in Motorcycles by designing a Hybrid Muffler
Project: Community noise regulations put stringent requirements on road vehicle exterior noise emission. Regulations apply to cars, trucks, buses, motorcycles and scooters. Manufacturers have to certify that their vehicles comply with noise emission standards by measuring according to procedures defined by international standards, commonly known as Pass-by noise tests.
The purpose of this work is to develop h hybrid muffler for motorcycles manufactured by India Yamaha Pvt. Ltd. The project deals in studying Indian and European Noise test standards; designing muffler using CAD and analysing the designs; choosing the materials for the muffler and performing tests on the materials; and finally manufacturing the muffler and performing the pass-by noise tests on the muffler.
The muffler models are designed using software like Solid Works, Catia; and the analysis is done on softwares like Abaqus, COMSOL, etc. Finally the muffler is manufactured in the industry.
The final pass-by Noise tests show that after using the hybrid muffler the noise emissions reduce to around 75 dB. Analysing the new muffler design shows the backpressure is very less comparing to the previous models, resulting in increased efficiency of the engine. This report also includes the tentative coast of the hybrid muffler.
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The purpose of this work is to develop h hybrid muffler for motorcycles manufactured by India Yamaha Pvt. Ltd. The project deals in studying Indian and European Noise test standards; designing muffler using CAD and analysing the designs; choosing the materials for the muffler and performing tests on the materials; and finally manufacturing the muffler and performing the pass-by noise tests on the muffler.
The muffler models are designed using software like Solid Works, Catia; and the analysis is done on softwares like Abaqus, COMSOL, etc. Finally the muffler is manufactured in the industry.
The final pass-by Noise tests show that after using the hybrid muffler the noise emissions reduce to around 75 dB. Analysing the new muffler design shows the backpressure is very less comparing to the previous models, resulting in increased efficiency of the engine. This report also includes the tentative coast of the hybrid muffler. .
8. Noise Barrier for the Baffle Range
Project: The main aim of the project is ti design an effective noise barrier for the baffle range which can reduce the unwanted noise up to the rquired level.
This report intends to cover various aspects at the detailed design stage including determination of acoustic properties of noise barriers like transmissoin loss, material selection, some important tips at design and stages and some calculation methodologies,
The inrtoductory section of this document provides the background information needed to understand the mechanisms involved in the generation, propagation and control of shooting noise. It describes the physics of sound, mechanisms of noise generation, sound characteristics of firearms, characteristics of sound wave propagation and sound measurement techniques.
Subsequent sections in the document describe existing noise guidelines or noise regulations and limits that are found in literature and/or law. With respect to these limits and measurements of shooting noise, an assessment can be made.
The concluding sections identify noise control principles and noise reduction techniques, and consider the design principles of a noise barrier. Typical principles, such as shooting noise levels, noise reduction with distance and sound barriers, and realistic expectations for noise control and some calculations simulations and their results.
This report intends to cover various aspects at the detailed design stage including determination of acoustic properties of noise barriers like transmissoin loss, material selection, some important tips at design and stages and some calculation methodologies,
The inrtoductory section of this document provides the background information needed to understand the mechanisms involved in the generation, propagation and control of shooting noise. It describes the physics of sound, mechanisms of noise generation, sound characteristics of firearms, characteristics of sound wave propagation and sound measurement techniques.
Subsequent sections in the document describe existing noise guidelines or noise regulations and limits that are found in literature and/or law. With respect to these limits and measurements of shooting noise, an assessment can be made.
The concluding sections identify noise control principles and noise reduction techniques, and consider the design principles of a noise barrier. Typical principles, such as shooting noise levels, noise reduction with distance and sound barriers, and realistic expectations for noise control and some calculations simulations and their results.