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International Journal of Automotive Technology

, Volume 17, Issue 5, pp 769–776 | Cite as

Hybrid modeling of seat-cab coupled system for truck

  • L. L. Zhao
  • C. C. Zhou
  • Y. W. Yu
Article

Abstract

For the complex structure and vibration characteristics of the seat and cab system of truck, there is no reliable theoretical model for the suspensions design at present, which seriously restricts the improvement of ride comfort. In this paper, a 4 degree-of-freedom seat-cab coupled system model was presented; using the mechanism modeling method, its vibration equations were built; then, by the tested cab suspensions excitations and seat acceleration response, its parameters identification mathematical model was established. Combining the tested signals and a simulation model with the parameters identification mathematical model, a new method of hybrid modeling of seat-cab coupled system was presented. With a practical example of seat and cab system, the parameters values were identified and validated by simulation and test. The results show that the model and method proposed are correct and reliable, and lay a good foundation for the optimal design of seat suspension and cab suspensions to improve ride comfort.

Key words

Ride comfort Seat-cab coupled system Dynamic characteristics simulation Hybrid modeling 

Nomenclature

mc

cab mass, kg

mb

equivalent mass of the driver-seat, kg

Icx

cab moment of inertia around the x c-axis, kg·m2

Icy

cab moment of inertia around the y c-axis, kg·m2

Ks

stiffness of the seat suspension, N/m

KcfL

stiffness of the front-left suspension of the cab, N/m

KcfR

stiffness of the front-right suspension of the cab, N/m

KcrL

stiffness of the rear-left suspension of the cab, N/m

KcrR

stiffness of the rear-right suspension of the cab, N/m

Cs

damping of the seat, N·s/m

CcfL

damping of the front-left suspension of the cab, N·s/m

CcfR

damping of the front-right suspension of the cab, N·s/m

CcrL

damping of the rear-left suspension of the cab, N·s/m

CcrR

damping of the rear-right suspension of the cab, N·s/m

lcfL

distance between the front-left suspension of the cab and origin o c in the y c-axis direction, m

lcfR

distance between the front-right suspension of the cab and origin o c in the y c-axis direction, m

lcrL

distance between the rear-left suspension of the cab and origin o c in the y c-axis direction, m

lcrR

distance between the rear-right suspension of the cab and origin o c in the y c-axis direction, m

lc1

distance between the front suspension of the cab and origin o c in the x c-axis direction, m

lc2

distance between the rear suspension of the cab and origin o c in the x c-axis direction, m

rx

distance between the installation position of the seat and origin o c in the x c-axis direction, m

ry

distance between the installation position of the seat and origin o c in the y c-axis direction, m

rz

vertical distance between the center of sprung mass of the seat suspension and origin o c, m

q1

vertical displacement of the frame at the installation position of the front-left suspension, m

q2

vertical displacement of the frame at the installation position of the rear-left suspension, m

q3

vertical displacement of the frame at the installation position of the front-right suspension, m

q4

vertical displacement of the frame at the installation position of the rear-right suspension, m

zc

translational degree of freedom of the cab along z c-axis, m

φc

rotational degree of freedom of the cab around y c-axis, rad

θc

rotational degree of freedom of the cab around x c-axis, rad

zb

translational degree of freedom of the seat along z b-axis, m

zcfL

cab vertical displacement at the installation position of its front-left suspension, m

zcfR

cab vertical displacement at the installation position of its front-right suspension, m

zcrL

cab vertical displacement at the installation position of its rear-left suspension, m

zcrR

cab vertical displacement at the installation position of its rear-right suspension, m

zcs

cab vertical displacement at the installation position of the seat suspension, m

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References

  1. Baig, H. A., Dorman, D. B., Bulka, B. A., Shivers, B. L., Chancey, V. C. and Winkelstein, B. A. (2014). Characterization of the frequency and muscle responses of the lumbar and thoracic spines of seated volunteers during sinusoidal whole driver vibration. J. Biomech. Eng. 136, 10, 101002–1.101002-7.CrossRefGoogle Scholar
  2. Chen, D. Y., Wang, L. M., Wang, C. Z., Yuan, L. K., Zhang, T. Y. and Zhang, Z. Z. (2015). Finite element based improvement of a light truck design to optimize crashworthiness. Int. J. Automotive Technology 16, 1, 39–49.CrossRefGoogle Scholar
  3. Donati, P. (2002). Survey of technical preventative measures to reduce whole-driver vibration effects when designing mobile machinery. J. Sound Vib. 253, 1, 169–183.MathSciNetCrossRefGoogle Scholar
  4. Griffin, M. J. (2012). Frequency-dependence of psychophysical and physiological responses to hand-transmitted vibration. Ind. Health 50, 5, 354–369.MathSciNetCrossRefGoogle Scholar
  5. Jamali, A., Shams, H. and Fasihozaman, M. (2014). Pareto multi-objective optimum design of vehicle-suspension system under random road excitations. Proc. Institution of Mechanical Engineers, Part K: J. Multi-body Dynamics 228, 3, 282–293.Google Scholar
  6. Ksiazek, M. A. and Ziemianski, D. (2012). Optimal driver seat suspension for a hybrid model of sitting human driver. J. Terramechanics 49, 5, 255–261.CrossRefGoogle Scholar
  7. Kim, H. J. and Martin, B. J. (2013). Biodynamic characteristics of upper limb reaching movements of the seated human under whole-body vibration. J. Appl. Biomech. 29, 1, 12–22.Google Scholar
  8. Lee, C.-M. and Goverdovskiy, V. N. (2009). Type synthesis of function-generating mechanisms for seat suspensions. Int. J. Automotive Technology 10, 1, 37–48.CrossRefGoogle Scholar
  9. Lemerle, P., Boulanger, P. and Poirot, R. (2002). A simplified method to design suspended cabs for counterbalance trucks. J. Sound Vib. 253, 1, 283–293.CrossRefGoogle Scholar
  10. Smith, S. D., Smith J. A. and Bowden, D. R. (2008). Transmission characteristics of suspension seats in multi-axis vibration environments. Int. J. Ind. Ergonom. 38, 5–6. 434–446.Google Scholar
  11. Stein, G. J., Múck, P. and Gunston, T. P. (2009). A study of locomotive driver’s seat vertical suspension system with adjustable damper. Veh. Syst. Dyn. 47, 3, 363–386.CrossRefGoogle Scholar
  12. Temmerman, J. D., Deprez, K., Anthonis, J. and Ramon, H. (2004). Concep-tual cab suspension system for a selfpropelled agricultural machine. Part 1: Development of a linear mathematical model. Biosyst. Eng. 89, 4, 409–416.CrossRefGoogle Scholar
  13. Temmerman, J. D., Deprez, K., Hostens, I., Anthonis, J. and Ramon, H. (2005). Concep-tual cab suspension system for a self-propelled agricultural machine. Part 2: Operator comfort optimisation. Biosyst. Eng. 90, 3, 271–278.CrossRefGoogle Scholar
  14. Tora, G. (2010). Study operation of the active suspension system of a heavy machine cab. J. Theor. App. Mech-Pol. 48, 3, 715–731.Google Scholar
  15. Tufano, S. and Griffin, M. J. (2013). Nonlinearity in the vertical transmissibility of seating: The role of the human driver apparent mass and seat dynamic stiffness. Veh. Syst. Dyn. 51, 1, 122–138.CrossRefGoogle Scholar

Copyright information

© The Korean Society of Automotive Engineers and Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  1. 1.School of AutomationBeijing University of Posts and TelecommunicationsBeijingChina
  2. 2.School of Transportation and Vehicle EngineeringShandong University of TechnologyZiboChina

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