Adaptive digital velocity control loop for a high performance elevator door system with low cost

US5384439A · kind A · utility

Assignee

• OTIS ELEVATOR COMPANY · US

Inventors

• Christoph M. Ernecke · Berlin, DE
• Michael Barten · Berlin, DE
• Mustapha Toutaoui · Berlin, DE

Key dates

• Filing date: Feb 16, 1993
• Grant date: Jan 24, 1995
• Expiry date: Feb 16, 2013

Classification

• Technology area (CPC G): Physics
• CPC primary: G05B2219/43074
• WIPO field: Control
• WIPO sector: Instruments

Abstract

The present invention solves the problem of discontinuous operation of an elevator door, depending upon the operating point of the door at the time of the reversal command, by a digital control technique which uses as a reference signal for the adaptation, the velocity dictation coming from a profile generator. This gives an information concerning the actual operating point. The adaptation of the controller parameters is made with respect to the signal.