Crane speed flexible control system and method based on incremental coding

Abstract

The invention discloses a crane speed flexible control system and method based on incremental coding. A programmable logic controller acquires the current crane slot address value through an increment detection device, the current crane slot address value is compared with a preset target crane slot address value, and is processed, the increment difference is correspondingly generated, and according to the continuously decreasing increment difference, the output frequency of a crane frequency converter is correspondingly controlled to decrease synchronously in a following mode. According to the crane speed flexible control system and method based on incremental coding, the original section speed signals are subdivided reasonably so that a crane will be linear and flexible in the whole speed reduction operation process, shakes of the crane are effectively eliminated, work pieces and jigs in the crane can be more stable and are not prone to swinging, working stability is greatly improved, and stable and normal production is guaranteed; meanwhile, the crane can operate in the ultra-high-speed environment with the output frequency of 120Hz, the operation speed is high, working efficiency is high, realization is easy, operation and control are convenient, and the system and method can be easily applied and popularized.

Description

technical field [0001] The invention belongs to the technical field of flexible driving speed control, and in particular relates to a flexible driving speed control system and a control method based on incremental coding. Background technique [0002] At present, the driving speed control system of surface treatment equipment mainly adopts the segment speed control method. This control method has the following disadvantages. [0003] 1. The driving speed is divided into 4 sections, that is, high speed 80Hz, medium speed 60Hz, low speed 40Hz, and slow speed 13Hz. When changing from high speed 80Hz to medium speed 60Hz (or medium speed to low speed, low speed to slow speed), there will be vibration when driving, which will cause the work on the driving to swing. If the workpiece falls in a swinging state, it is easy to hit the edge of the groove, causing damage to the workpiece or the hanger. [0004] 2. This kind of segment speed control method can only be used at high spe...

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