DBPapers
DOI: 10.5593/sgem2017/13/S03.074

NEW TRENDS TO OPTIMIZE THE OPERATING PARAMETERS OF VERTICAL TRANSPORT INSTALLATIONS

F.D. Popescu, B. O. Tomus, I. Kertesz
Monday 11 September 2017 by Libadmin2017

References: 17th International Multidisciplinary Scientific GeoConference SGEM 2017, www.sgem.org, SGEM2017 Conference Proceedings, ISBN 978-619-7105-00-1 / ISSN 1314-2704, 29 June - 5 July, 2017, Vol. 17, Issue 13, 581-590 pp, DOI: 10.5593/sgem2017/13/S03.074

ABSTRACT

The acceleration and deceleration periods during each race of a vertical transport
installation may be considered as periods of transitional processes where kinematics and dynamic measures variations take place (acceleration, speed and forces) as well as some electric measures (actuating motor’s current). Considering T as the duration of the process, for the minimisation of the installed power, the minimisation of the energy dissipated in the system is imposed during the transitional period: W = D₁ (ꭍₒᵀ i² (t) dt) → min (!) where i(t) is the intensity of the current absorbed by the actuating motor. According to the same considerations this integral is equivalent to: W = D₂ (ꭍₒᵀ a² (t) dt) → min (!) where a(t) is the acceleration of the system, considered here as a command value. Mainly, in order to minimise the above integrals, values as small as possible need to be adopted for current i(t) as well as for acceleration a(t). On the other hand, if the acceleration drops drastically it may lead to exceeding the imposed value of process T, implying as well a compromising solution.

Keywords: Acceleration, Tachograms, Speed, Torque, Power