Novel coffee machine temperature anti-interference control method

Abstract

The invention discloses a novel coffee machine temperature anti-interference control method. The method comprises the following steps: 1, considering an inertia coefficient of a coffee machine temperature control system, a gain of the coffee machine temperature control system and delay time of the coffee machine temperature control system, and establishing a temperature control system frequency domain model and a time domain model of a full-automatic coffee machine; 2, according to to-be-controlled input, the power-temperature transfer function without considering the delay and the delay timeof the coffee machine temperature control system, obtaining a delay influence suppression quantity; and 3, according to to-be-controlled input, the power-temperature transfer function without considering the delay, the delay time of the coffee machine temperature control system and the delay channel filter, obtaining the flow influence estimation quantity. Compared with a traditional method, the method has the advantages of being simple in form, easy to implement, better in anti-delay control performance and better in anti-interference control performance.

Description

technical field [0001] The invention belongs to the field of industrial control products, and relates to a high-precision temperature control method for coffee machines, in particular to a novel coffee machine temperature anti-interference control method, which is a coffee machine temperature control method based on flow impact estimation and delay impact suppression . Background technique [0002] Although the output of coffee machines made in China ranks first in the world at present, most of them are relatively low-end percolation or drip coffee machines, and fully automatic coffee machines with real-time temperature control are almost monopolized by foreign products. The higher the accuracy of temperature control, the better the taste of the coffee produced. Domestic fully automatic coffee machines with high-precision temperature control are in urgent need of research and development. [0003] There are two major difficulties in the high-precision temperature control of...

AI Technical Summary

Problems solved by technology

[0003] There are two major difficulties in the high-precision temperature control of a fully automatic coffee machine. The first is that the temperature control of a fully automatic coffee machine itself is a control system with a large delay. The existence of this delay will greatly reduce the adjustment time process and accuracy of the temperature control. , and even lead to the failure of temperature control; the second is that the temperature control of the fully automatic coffee machine is greatly disturbed by the water flow, and the existence of interference will directly lead to a great reduction in the accuracy of temperature control

The existing temperature control of fully automatic coffee machines is generally based on the proportional-integral-derivative (PID) algorithm. Directly using the PID algorithm for temperature control has a weak ability to suppress large delays and interferences. Generally, the only way to increase the proportional coefficient and integral coefficient Slightly improved the control performance of suppressing delay and interference

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