Thoughts on inquiries in physical and inner worlds

[+] Author and Article Information
VJ Modi

Department of Mechanical Engineering, University of British Columbia, Vancouver, BC, Canada V6T 1Z4; modi@mech.vbc.ca

Appl. Mech. Rev 56(2), R9-R18 (Mar 04, 2003) doi:10.1115/1.1511738 History: Online March 04, 2003

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Modi VJ (1982), Dynamics of an inflatable structure suitable for use in submarine detection: A brief review, Proc of Indian Academy of Sciences, Vol 5 , Part 1, 51–73.
Modi  VJ (1997), Moving surface boundary-layer control: A review, J. Fluids Struct., 11, 627–663.
Modi  VJ, Welt  F, and Seto  ML (1995), Control of wind-induced instabilities through application of nutation dampers: A brief overview, Eng. Struct., 17(9), 626–638.
Modi VJ, Fernando MSUK, and Yokomizo T (1998), An integrated approach to design of a wind energy operated irrigation system, Proc of ASME/AIAA Wind Energy Symp, 36th AIAA Aerospace Sciences Meeting, Reno, Nevada, AIAA and ASME, Paper No. ASME/AIAA 98-0041, 165–182.
Modi VJ, Akutsu T, and Yokomizo T (1997), Fluid dynamics of a sphere and performance of the Starr-Edwards prosthesis (invited plenary address), Proc of 9th Int Conf on Biomedical Engineering, Singapore, JCH Goh and A Nather (eds), BAC Printers, Singapore, 125–129.
Modi VJ, Ying B, and Yokomizo T (1991), An approach to design of the next generation of fuel efficient trucks through aerodynamic drag reduction, Proc of ASME Winter Annual Meeting, Atlanta, SA Velinsky, RM Fries, I Hague, and D Wang (eds), ASME, DE-Vol. 40, 465–482.
Modi VJ (1996), Dynamics and control of large flexible space structures (invited plenary address), Proc of 36th Israel Annual Conf on Aerospace Engineering, Tel Aviv/Haifa, JB Greenberg et al (eds), Omanuth Press Ltd, Haifa, Israel, A-9–A-36.
Modi VJ (1995), System modes based dynamics and control of multibody systems: Analysis and applications, AAS/AIAA Astrodynamics Specialist Conf, Halifax, Nova Scotia, Canada, Paper No. AAS-95-395 (also Advances in the Astronautical Sciences, AAS Publications Office, San Diego CA, K Terry Alfriend et al (eds), 90, 1543–1568).
Modi  VJ (1998), Man, the unknown: Fleeting impressions of an uncertain mind, Acta Astronaut., 41(2), 63–90.
Hénon  M, and Heiles  C (1964), The applicability of the third integral of motion: Some numerical experiments, Astron. J., 69(1), 73–79.
Favre A (1938), Contribution a l’etude experimentale des mouvements hydrodynamiques a deux dimensions, Thesis, Univ of Paris.
Modi VJ (2000), On the moving surface boundary-layer control (Invited plenary presentation), Fluids 2000 and Exhibit, AIAA, Denver CO, Paper No AIAA-2000-2238.
Modi VJ, Zhang J, and de Silva CW (2002), Dynamics and control of manipulator with slewing and deployable links, AIAA/AAS Astrodynamics Specialist Conf, Monterey CA, Paper No AIAA-2002-4522.
Ranganathananda S (1996), Vedanta and Science, Second Edition, Ramakrishna Mission Inst of Culture Publ, Calcutta, India.


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A chart showing the variation of environmental torques with altitude on GEOS-A satellite. Note, at the geostationary altitude of 22,300 miles (36,000 km) used by communications satellites, solar pressure and gravitational torques are of the same order of magnitude. Similarly, for near earth satellites, the aerodynamic force has dominant effects.
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Response of a spinning satellite showing significance of various system parameters. Note, the solar pressure parameter is as important as other system variables traditionally used in the spacecraft design.
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A schematic representation of an invariant surface
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Effect of the solar radiation pressure parameter C on the limiting invariant surface representing the bound of stability. A significant reduction in the stability region is apparent for higher C: e=0.1,Ki=1, ϕ=solar aspect angle=0. θ represents the true anomaly.
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Schematic diagrams of bodies with the Moving Surface Boundary-layer Control (MSBC) used in the study: a) slender geometry represented by an airfoil; and b) bluff bodies.
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Plots to assess relative influence of different configurations studied on the lift and stall characteristics
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Representative flow visualization pictures showing, rather dramatically, successful control of the boundary-layer separation through momentum injection
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Application of the MSBC to reduce drag of barges
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A simplified schematic diagram of a flexible platform with the Mobile Servicing System (MSS): Dynamics and control of this class of systems represent problems never encountered before.




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