Overshoot compensation control method and overshoot compensation control system for material in mixing plant

Abstract

The invention discloses an overshoot compensation control method and an overshoot compensation control system for material in a mixing plant. The overshoot compensation control method comprises the following step: pre-establishing a material flow coefficient K1, a material gate operating speed K2 and a corresponding relation table for overshoot values; selecting an overshoot value of the current state from the corresponding relation table by detecting a material flow coefficient K1 when the weighing of the material is about to finish and a material gate operating speed K2 when the material gate is closed, and according to a material flow coefficient K1 and a material gate operating speed K2 corresponding to the current time; and setting the overshoot value as the compensation value for calculating weighing hopper and material weight. According to the method, the material flow condition and the material gate operating speed can be detected promptly; and a proper overshoot value is selected from the corresponding relation table according to real situation to serve as the compensation value of the current overshoot value. The method provided by the invention has the advantage that the material weighing dynamic accuracy is improved to a great extent, so as to improve batching accuracy and product quality.

Description

technical field [0001] The invention relates to the technical field of batching precision control of a mixing station, in particular to a control method and a control system for overshoot compensation of materials in a mixing station. Background technique [0002] Asphalt mixing plant is a typical mixing plant system for producing asphalt mixture. It mixes various aggregates, mineral powder, and asphalt according to the required ratio to obtain asphalt product ingredients that meet the use standards. [0003] In the prior art, asphalt product ingredients are generally dynamically weighed and measured by the automatic control system of the mixing station for various materials (stones, sand, mineral powder, recycled powder, asphalt, additives, etc.) according to the formula, and then sent to the mixing station. Tank mixing into asphalt mixture. It consists of subsystems such as storage, primary distribution, drying, lifting, screening, batching, mixing, and finished material ...

AI Technical Summary

Problems solved by technology

[0006] The general method of estimating the overshoot in the prior art is as follows: always assume that the overshoot is fixed, however, the system generally uses a piston pump, the operation of the air compressor is intermittent, and the pressure in the air circuit changes periodically, so the cylinder The action speed of the feeder is constantly changing, and the action speed of the material gate is constantly changing. The current overshoot cannot be accurately expressed by the static overshoot.

Images