Donald Gordon Mcpherson
Engineers at Canosa Ct, Westminster, CO
License number
Colorado 1474
Issued Date
Feb 17, 1951
Renew Date
May 1, 2003
Expiration Date
Apr 30, 2005
Type
Professional Engineer
Address
Address
7071 Canosa Ct, Westminster, CO 80030
Personal information
See more information about Donald Gordon Mcpherson at radaris.comName
Address
Phone
3882 Union Ct, Wheat Ridge, CO 80033
3625 Strawberry Field Grv Apt, Colorado Spgs, CO 80906
7903 W 90Th Dr, Broomfield, CO 80021
7071 Canosa Ct, Westminster, CO 80030
15058 Madison St, Brighton, CO 80602
Professional information
Dynamically Generated Adaptive Elevator Velocity Profile
US Patent:
4751984, Jun 21, 1988
Filed:
May 3, 1985
Appl. No.:
6/730228
Inventors:
Walter L. Williams - Denver CO
Donald G. McPherson - Westminster CO
Arnold Mendelsohn - Simsbury CT
Donald G. McPherson - Westminster CO
Arnold Mendelsohn - Simsbury CT
Assignee:
Otis Elevator Company - Farmington CT
International Classification:
B66B 130
US Classification:
187116
Abstract:
Elevator velocity profile generation is based upon combining an open loop, least time profile for acceleration with a precision closed loop, phase plane control for deceleration. The deceleration phase-plane velocity profile is generated as a modified mirror image of the acceleration profile, and transition from open loop control is within ride quality constraints. Adaptive control permits operating a drive unit closer to its limits without danger of overloading under worst case conditions, which account for a small percentage of the time. Thus, smaller drive units can be used in a given application with minimal impact on performance.
Automatic Elevator Load Sensor Calibration System
US Patent:
4674605, Jun 23, 1987
Filed:
Apr 18, 1986
Appl. No.:
6/853600
Inventors:
Donald G. McPherson - Westminster CO
Assignee:
Otis Elevator Company - Farmington CT
International Classification:
G01G 1914
US Classification:
187131
Abstract:
An empty elevator car is caused to lift a predetermined calibration weight(s) located above the normal car excursion. The car load sensor signals before and after lifting the calibration weight together with the known values for the empty car weight and the calibration weight are used to recalibrate the load versus signal function.