International Journal of Automotive Technology

The Korean Society of Automotive Engineers (한국자동차공학회)
권호 표지

CONTROL PERFORMANCE IMPROVEMENT OF AN EMV SYSTEM USING A PM/EM HYBRID ACTUATOR

  • Ahn, H.J. (Department of Mechanical Engineering, College of Engineering, Soongsil University) ;
  • Chang, J.U. (School of Mechanical & Aerospace Engineering, Seoul National University) ;
  • Han, D.C. (School of Mechanical & Aerospace Engineering, Seoul National University)
  • Published : 2007.08.31
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, we improved control performance of an EMV (electromechanical valve) system using a PM/EM (permanent magnet/electromagnet) hybrid EMA (electromagnetic actuator) and showed the feasibilities of both soft landing and fast transition of the EMV system using a simple PID control. The conventional EMV systems using only EM show significant nonlinear characteristics. Therefore, it is very difficult to control the valve position and several complex control schemes are used. This paper focused on the control performance improvement using a PM/EM hybrid actuator. In particular, a PM is used as a key design parameter such as a bias current of a magnetic bearing in order to improve the linear characteristic of the actuator, although most PM/EM hybrid actuators use a PM as a power saver during valve-open and -closed states. First, a FE (finite element) analysis was performed to confirm its linear static force characteristics. Then, both a test rig and a valve control system were built in order to prove experimentally the control performance improvement of the actuator. Finally, feasibilities of both soft landing and fast transition of the system were shown experimentally through gain-scheduled PID (proportional derivative integral) control.

Keywords

References

  1. Ahn, H. J., Lee, S. W., Lee, S. W. and Han, D. C. (2003). Control-relevant identification of the MIMO AMB rigid rotor: The design of an optimal controller for the magnetic bearing system. Automatica 39, 2, 299–307
  2. Chang, J. U., Ahn, H. J. and Han, D. C. (2007). Design parameter study of a permanent magnet biased magnetic actuator for improving stiffness and linearity. J. Mechanical Science and Technology 21, 8, 1218-1225 https://doi.org/10.1007/BF03179038
  3. Henry, R. and Lequesne, B. (1997). A Novel Fullyflexible electro-mechanical engine valve actuation system. SAE Paper No. 970249
  4. Kluting, M. and Flierl, R. (2000). The third generation of valvetrains – New fully variable valvetrains for throttlefree load control. SAE Paper No. 2000-01-1227
  5. Kreuter, P., Heuser, P. and Schebitz, M. (1993). Strategies to improve SI engine performance by means of variable intake lift timing and duration. SAE Paper No. 930825
  6. Lee, S. H., Chang, J. U., Lee, S. W., Kim, O. S. Chang, I. B. and Han, D. C. (2002). Design of novel permanent magnet biased linear magnetic bearing and its application to high-precision linear motion stage. 8th Int. Symp. Magnetic Bearings, Ibaraki, Japan. 543-548
  7. Lee, S. H. (2001). Fine Motion Control Characteristics of Magnetically Levitated (MAGLEV) Ultra Precision Stage Using PM/EM hybrid Magnetic Bearing. Ph. D. Dissertation. Seoul National University
  8. Okada, Y., Marumo, Y. and Konno, M. (2004). Electromagnetic valve actuator for automobile engines. SAE Paper No. 2004-01-1387
  9. Park, S. H., Lee, J. H., Yoo, J. S., Kim, D. J. and Park, K. S. (2003). Effect of design and operating parameters on the static and dynamic performance of an electromagnetic valve actuator. ImechE, 217, Part D: J. Automobile Engineering, 193-201 https://doi.org/10.1243/09544070360550480
  10. Peterson, K. S., Stefanopoulou, A. G., Wang, Y. and Megi, T. (2003). Virtual lash adjuster for an electromechanical valve actuator through iterative learning control. Proc. IMECE DSCD 2003-41270
  11. Peterson, K. S. and Stefanopoulou, A. G. (2002). Nonlinear self-tuning control for soft landing of an electromechanical valve actuator. Proc. IFAC on Mechatronics, 207–212
  12. Pischinger, M., Salber, W., Staay, F. V. D., Baumgarten, H. and Kemper, H. (2000). Low fuel consumption and low emissions-Electromechanical valve train in vehicle operation. Int. J. Automotive Technology 1, 1, 17-25
  13. Pulkrabek, W. W. (1997). Engineering Fundamentals of the Internal Combustion Engine. Prentice-Hall. New Jersey
  14. Schweitzer, G., Bleuler, H. and Traxler, A. (1994). Active Magnetic Bearings. Hochschulverlag AG an der ETH Zurich
  15. Tai, C. and Tsao, T. C. (2003). Control of an electromechanical actuator for camless engine. Proc. American Control Conf., Denver, Colorado, 3113-3118
  16. Tai, C. and Tsao, T. C. (2002). Control of an electromechanical camless valve actuator. Proc. American Control Conf. Anchorage, AK 262-267
  17. Theobald, M. A., Lequesne, B. and Henry, R. (1994). Control of engine load via electromagnetic valve actuators. SAE Paper No. 940816
  18. Yim, J. S., Kim, J. H., Seol, S. K., Ahn, H. J., Park, I. H. and Han, D. C. (2002). A novel cost-effective scheme of power amplifier for AMBs using space vector technology. 8th Int. Symp. Magnetic Bearings (ISMB- 8), Ibaraki, Japan. 101-105