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A speed pattern generator, and method of generating a speed pattern, for use by an elevator car during a run to a target floor. The speed pattern includes a time based portion and a distance-to-go based portion. Calculations during the time based portion are minimized by calculating spaced points or

A speed pattern generator, and method of generating a speed pattern, for use by an elevator car during a run to a target floor. The speed pattern includes a time based portion and a distance-to-go based portion. Calculations during the time based portion are minimized by calculating spaced points or decision speeds on the acceleration portion of the desired speed pattern. The points selected are those points at which decisions must be made as to whether the acceleration portion of the pattern should be continued. The pattern is changed at a predetermined jerk limited rate between the decision points, until a decision is made which indicates acceleration should be reduced to zero, either because the maximum desired magnitude of the speed pattern is being approached, or because the advanced floor position (AVP floor) of the elevator car has reached the target floor. A final and single calculation during the time based portion is then made, which uses the latest decision speed to calculate the desired slowdown distance for the elevator car. When the elevator car reaches the calculated slowdown distance, a distance-to-go speed pattern is generated, which is substituted for the time based pattern when the two patterns have a predetermined relationship.

대표청구항 ▼

A method of generating a speed pattern for a run of an elevator car to a target floor, comprising the steps of: (a) calculating a decision speed on the acceleration portion of a desired speed pattern, (b) providing a speed pattern generator, and (c) changing the output of the speed pattern generator

A method of generating a speed pattern for a run of an elevator car to a target floor, comprising the steps of: (a) calculating a decision speed on the acceleration portion of a desired speed pattern, (b) providing a speed pattern generator, and (c) changing the output of the speed pattern generator at a predetermined jerk limited rate until the magnitude reaches the magnitude of the calculated decision speed point.