Back to results
US 5,859,395 AGranted
Method for generating velocity profiles for elevator car doors
AssigneeOtis Elevator Company
InventorRichard N. Fargo
Life of this patent
Estimating the term…
Abstract
A method for generating velocity profiles for elevator car doors includes a step of generating a straight line velocity versus time profile. The profile is then passed through a low pass finite impulse response filter to smooth the transition between different velocity and acceleration values and to limit certain undesired frequencies. The filtered profile can be integrated into a position versus time profile and stored in the RAM of a control system to be used for subsequent operations.
Claims4
A method for generating velocity profiles for elevator car doors, said method comprising steps of:
- generating a straight line velocity versus time profile for desired door movement;
- passing said straight line velocity versus time profile through a low pass filter to obtain a filtered velocity versus time profile for limiting frequency content of said velocity versus time profile;
- integrating said filtered velocity versus time profile to obtain a position versus time profile;
- and
- storing said position versus time profile.
2 more elements
Dependencies are inferred from the claim text.