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Jain, Vikas
- Effect of Road Profile and Curves Generated by Wheel on the Performance of a Shock Absorber of a Motorcycle
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PDF Views:257
Authors
Affiliations
1 Mechanical Engg Dept,, SGS Inst. of Tech. & Sci., Indore, IN
2 Indore Inst. of Sci. &Tech., Indore-452003, IN
1 Mechanical Engg Dept,, SGS Inst. of Tech. & Sci., Indore, IN
2 Indore Inst. of Sci. &Tech., Indore-452003, IN
Source
Indian Journal of Science and Technology, Vol 4, No 5 (2011), Pagination: 534-538Abstract
A front wheel suspension system of a motorcycle is assigned to a quarter car model and from which one shock absorber is considered for the performance study. The deviations from the cycloidal rotation of the wheel are proposed and the vertical motion of the wheel with respect to the sinusoidal road surface is modelled by a polynomial equation and compared with the experimental data. To give deterministic impulses due to road profile, the adjustable bumps are angularly mounted on a variable eccentric cam which gives input motion to a shock absorber mounted upright above it and acting as follower to the cam. For the heavier loads the rebound of shock absorber reduces and displacement smoothens. There occurs a combination of speed range, load and road disturbances within which the vertical acceleration is within the standard limit.Keywords
Quarter Car Model, Shock Absorber, Road Profile, Curves Generation by WheelFull Text
References
- Fenton J (1996) Hand book of vehicle design analysis, SAE Intl. Publi.pp:461-463.
- Ghosh A and Malik A (1992) Theory of mechanisms and machines. Affiliated East-West Press Pvt. Ltd. pp:332-355.
- Imine H, Delanne Y and M’Sirdi (2003) Road profiles inputs to evaluate loads on the wheels. Ph. D Thesis, I’Universit’e de Versailles Saint Quentin en Yvelines.
- Inman D (2001) Engineering vibration. Prentice– Hall, Inc., Upper Saddle River, New Jersey. pp:112– 123.
- Savaresi SM and Spelta AC (2009) Single-sensor control strategy for semi–active suspensions. IEEE Trans. on Control Sys. Technol. 17(1), 143-152.
- Vygodsky M (1978) Mathematical hand book. MIR Publi., Moscow. pp:795-826.
- Characteristics of Ferro Fluid
Abstract Views :501 |
PDF Views:130
Authors
Affiliations
1 Mechanical Engineering Department, SGS Institute of Technology and Science, Indore-452002, IN
2 Principal, Indore Institute of Science and Technology, Indore-452003, IN
1 Mechanical Engineering Department, SGS Institute of Technology and Science, Indore-452002, IN
2 Principal, Indore Institute of Science and Technology, Indore-452003, IN
Source
Indian Journal of Science and Technology, Vol 4, No 11 (2011), Pagination: 1505-1509Abstract
This paper focuses on the synthesis and characterization of ferro fluid (smart fluid). The colloidal mixtures of magnetite in carrier fluid were made by different chemical processes. The characteristics like particle size, turbidity, density, viscosity, and damping were studied. The average particle size after repeated filtering measured to 12 nm. The turbidity variation was found to be almost negligible. The damping coefficient varied from 0.2418 Ns/m to 0.8348Ns/m in the magnetic field. The effect of magnetic field on viscosity was studied on in house made viscometer and calibrated with the existing Redwood viscometer. It was possible to change the viscosity with the change in magnetic field. Such smart fluid could be used in a semi active shock absorber of a vehicle for better performance.Keywords
Ferro Fluid, Viscosity, Magnetic Field, Smart FluidFull Text
References
- Afkhami S, Renardy Y, Renardy M, Riffle JS and St. Pierre TG (2008) Numerical modeling of ferrofluid droplets in magneti fields. 15th Intl. Congress on Rheol. The Soc. Rheol. 80th Annual Meeting.pp:521-526.
- Alexander V Lebedev, Andreas Engel, Konstantin I Morozov and Heiko Bauke (2003) Ferrofluid drops in rotating magnetic fields. New J. Phys. 5, 57.1–57.20. doi:10.1088/1367-2630/5/1/357.
- Brousseau D (2008) Wave front correction with a ferro fluid deformable mirror, experimental results and recent developments. Ph.D. Thesis, Universite’ Lavel.
- Hrovat D (1998) Survey of advanced suspension developments and related optimal control applications. Automatica. 33(10), 1781-1817.
- Huke B and Lu¨cke M (2003) Magnetization of concentrated polydisperse ferrofluids: Cluster expansion. Physical Rev. E 67, 051403.
- Ravaud R and Lemarquand G (2009) Mechanical properties of a ferro fluid seal. Three dimensional analytical approach based on the Columbian model. Prog. in Electromagnetics Res. 13, 385–407.
- Tomasz Strek (2005) Finite element simulation of Heat transfer in ferro fluid. Intl. J. Appl. Mechanics & Engg. 10, 103-105.
- Upadhyay Shail (2006) Simple technique to measure volume of solid body using ferro fluid. Physics Edu. April- June . pp:21-26.
- Physicochemical and Preliminary Phytochemical Studies on the Fruit of Tribulus terrestries Linn.
Abstract Views :187 |
PDF Views:0
Authors
A. K. Meena
1,
Kiran Sharma
2,
Vikas Jain
2,
Bhavana Pal
2,
K. Ajit
1,
Uttam Singh
2,
R. Singh
1,
M. M. Rao
1
Affiliations
1 National Institute of Ayurvedic Pharmaceutical Research, Patiala–47001, Punjab, IN
2 Shobhit University, Meerut, UP, IN
1 National Institute of Ayurvedic Pharmaceutical Research, Patiala–47001, Punjab, IN
2 Shobhit University, Meerut, UP, IN
Source
Research Journal of Science and Technology, Vol 2, No 2 (2010), Pagination: 31-33Abstract
The present communication attempts to evaluate the physicochemical and preliminary phytochemical studies on the fruit of Tribulus terrestries Linn. Zygophyllaceae family.
Tribulus terrestries is an annual or perennial, prostrate herb with many slender, spreading branches and silky-villous young parts. The plant grows wild throughout India, the shrub thrives in well irrigated black soil upto attitudes of 3000m. Tribulus terrestries is traditionally used in the formulation for antiurolithiatic activity, anthelmintic activity, anti-inflammatory activity, cardiac activity, aphrodisiac activity etc.
As there is no detailed standardisation work reported on fruit, the physicochemical parameters, preliminary phytochemical constants, toxic heavy metals, pesticide residue, and aflatoxin analysis are carried out. The study revealed specific identities for the particular crude drug which will be useful in identification and control to adulterations of the raw drug.
