Linkage Mechanism Optimization and Sensitivity Analysis of an Automotive Engine Hood

Year 2018, Volume: 2 Issue: 1, 7 - 16, 30.03.2018

Onur Denizhan , Meng-Sang Chew

https://doi.org/10.30939/ijastech..364438

Cited By: 1

Abstract

Equipment such as a rod between vehicle body and
hood or a lift strut are used to keep automobile hood in open positions during
the regular maintenances or repairs. Moreover, some effort is required to open
or close automobile hood because of its weight. To keep it in various opened positions
and to exert the least force to open or close it, a mechanism is used in
conjunction with extension, compression or torsion springs in two different
configurations. Each optimization has been carried out for all these different
springs, each in two configurations and results are compared. Sensitivity
analysis for the design variables are examined to determine how these variables
are influential on the designed mechanism. Optimization results of extension
and compression springs are observed to be similar in both configurations of
the designed mechanism. On the other hand, results for the torsion spring in
two configurations are exactly the same for the mechanism. Sensitivity analysis
shows that the designed mechanism is not sensitive on the design variables that
are on the bound in both of these two configurations.    

Keywords

Automobile engine hood, Linkage mechanism, Mechanism synthesis, Nonlinear optimization, Sensitivity analysis, Springs

References

• [1] Choi, K.S. et al. (2007). Dynamic analysis of vehicle trunk lid with 4-bar link structure. World Congress, Detroit, Michigan, April 16-19.
• [2] Ko, O.S. (1995). The mechanism analysis on hood, tail gate, and trunk lid by mathematical modeling. International Congress and Exposition, Detroit, Michigan, February 27 – March 2.
• [3] Norton, R.L. (1999). Design of machinery. McGraw-Hill
• [4] Deb, K. and Goyal, M. (1998). Flexible optimization procedure for mechanical component design based on genetic adaptive search. Journal of Mechanical Design 120 (2): 162-164.
• [5] Kannan, B.K. and Kramer, S.N. (1994). An augmented lagrange multiplier based method for mixed integer discrete continuous optimization and its applications to mechanical design. Journal of Mechanical Design 116 (2): 405-411.
• [6] Sandgren, E. (1990). Nonlinear integer and discrete programming in mechanical design optimization. Journal of Mechanical Design 112: 223-229.
• [7] Parades, M. et al. (2001). An optimization process for extension spring design. Computer Methods in Applied Mechanics and Engineering, 191 (8-10): 783-797.
• [8] Nathan, R.H. (1985). A constant force generation mechanism. Journal of Mechanisms, Transmissions and Automation in Design, 107: 508-512.
• [9] Marsh, G.L. (1975). Compression spring. United States: Patent 3,892,398.
• [10] Genova, P.E. (1972). Mechanics of plane mechanisms with spring links. VI Lenin, Sofia, Bulgaria: Mechanical and Electro-Technical Institute.
• [11] Matthew, G.K. and Tezar, D. (1977). Synthesis of spring parameters to balance general forcing functions in planar mechanism. Journal of Engineering for Industry, 347-357.
• [12] Hain, K. (1961). Spring mechanisms point balancing. Spring Design and Application, New York, McGraw-Hill, 268-275.
• [13] Shigley, J.E. et al. (2003). Mechanical engineering design. McGraw, New York, 542.
• [14] Century Springs Company (2003). Torsion springs. Engineers Guide.
• [15] Schwieterman, M.A. and Hutchinson, D.E. (1996). Torsion spring balance assembly and adjustment method. United States: Patent 5,893,936.
• [16] Vrooland, E. J. and Curtis, M. (1985). Spring balance assembly. United States: Patent 4,537,233.