Identification and experimental validation of a scalable elevator vertical dynamic model

Young Man Cho, Rajesh Rajamani

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


A reliable model of an elevator's vertical motion is of tremendous value in many aspects of elevator design, installation and service. The challenges in developing and validating a dynamic model for an elevator arise from the large size of the dynamic system involved, its position-dependent or time-varying nature and from the limited number of variables available for measurement. In this paper, a physics-based dynamic model of an elevator's vertical motion, scalable to varying rises, is first derived. Then, extensive experimental data is obtained from two elevator systems with rises over 100 and 250 m. The corresponding parameters of the two elevator systems are identified via modal analysis and a numerical mode-matching procedure so that the model-predicted transfer functions may best match the experimentally estimated ones. The scalability of the model is subsequently examined to extend the validity of the model to untested elevator systems. Finally, the experimentally validated model is successfully used in predicting the performance indices of high-rise elevators.

Original languageEnglish (US)
Pages (from-to)181-187
Number of pages7
JournalControl Engineering Practice
Issue number2
StatePublished - 2001

Bibliographical note

Funding Information:
The authors would like to thank Drs. Randy Roberts, Helio Tinone, and Mike Griffin for their generous support and encouragement. This research was supported in part by a grant from the BK-21 Program for Mechanical and Aerospace Engineering Research at Seoul National University, Institute of Advanced Machinery and Design at Seoul National University, and OTIS Elevator Company.


  • Identification
  • Modeling
  • Parameter estimation
  • Vertical dynamics


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