Abstract:
A method for scheduling airplanes. Eastbound and westbound flights are scheduled to arrive to and depart from an airport within a small period of time (e.g., 5 minutes). By now scheduling both eastbound and westbound flights to arrive to and depart from an airport within a small block of time, the flow of air traffic is smoothed. Further, the scheduling structure of the present invention allows the passenger's connect time profile to be the same for all the passengers thereby extending the minimum connect time to a greater number of passengers. Further, the scheduling structure of the present invention allows staggered gating (gates are paired in such as a manner as to function as a single gate) thereby expanding gate separation as well as allowing a reduction or an elimination of the gap in times in the services being performed above and below the wings of an aircraft.
Abstract:
A control system for a cutting machine is disclosed in which the relative motion between a cutting tool, supported by a cutting motor, and the material to be cut is controlled by a feed motor. The cutting motor load level is continuously monitored and used to derive a load level signal which is related to the cutting motor load level and a desired cutting load level. The feed motor's forward speed is controlled to increase at a selected fixed rate until the cutting motor load level is substantially equal to the desired cutting load level. Whenever the cutting motor load level increases above the desired cutting load level, representing an overload condition, the speed of the feed motor in the forward direction is reduced at the rate of increase of the overload condition. If the cutting motor load level exceeds a threshold load level, the feed motor is driven in a reverse direction at a speed which increases or decreases at a rate related to the rate at which the cutting motor load level increases above or decreases toward said threshold load level.