Intelligent temperature control algorithm suitable for livestock and poultry breeding waste treatment

Abstract

The invention discloses an intelligent temperature control algorithm suitable for livestock and poultry breeding waste treatment, and the algorithm comprises the following steps: 1, carrying out the modeling of a temperature control object of an aerobic fermentation system for feces treatment, and obtaining a transfer function of the temperature control object of the aerobic fermentation system; 2, designing a fuzzy PID intelligent temperature control algorithm for the transfer function; and step 3, performing simulation result analysis on the fuzzy PID intelligent temperature control algorithm, and performing comparative analysis with an output curve of a simulation result of a conventional PID algorithm. The purpose of the invention is to obtain a relatively accurate transfer function specially aiming at a manure aerobic fermentation temperature change process (namely a controlled object) through scientific analysis, and then design a self-adaptive temperature control algorithm on this basis to quickly adjust PID parameters and meet the temperature control precision in the aerobic fermentation process. In addition, the method has good robustness and universality for various temperature change requirements possibly involved in the fermentation process.

Description

technical field [0001] The invention belongs to the field of livestock and poultry breeding waste treatment, and in particular relates to an intelligent temperature control algorithm suitable for livestock and poultry breeding waste treatment. Background technique [0002] In order to make up for the lack of pork consumption demand, other types of large-scale livestock and poultry farms, such as chicken farms, duck farms, and sheep farms, are also rapidly being built. The rising consumer demand for livestock and poultry products has promoted the rapid development of animal husbandry, making the scale, intensification, and industrialization of breeding more and more high, and the overall volume of livestock and poultry breeding is also on the rise. However, the rapidly developing animal husbandry, while ensuring the growing demand for livestock and poultry products, has produced a large amount of breeding waste, which has also brought enormous pressure to environmental govern...

AI Technical Summary

Problems solved by technology

In addition, the anaerobic degradation of the fresh manure of poultry and livestock will also produce a high concentration of hydrogen sulfide, which seriously threatens the eyes of humans and livestock, and even causes death.

[0013] (2) Aggravate the deterioration of water body

[0017] (4) Pollution of farmland environment

[0032] First, the output stability of the current temperature control algorithm in the aerobic fermentation of livestock and poultry is not ideal, and the overshoot of the aerobic fermentation system is large when the aerobic fermentation system is started in the process of manure treatment, resulting in a waste of additional electric energy for auxiliary heating of the fermentation tank , which indirectly increases the carbon emissions of the coal grid, which does not conform to the current low-carbon, green, and environmental-friendly development concept;

[0033] Second, there is currently no scientific modeling and analysis for the fermentation process, or to really understand what kind of transfer function the controlled object is. As a result, the use of conventional PID algorithms may not be able to achieve control accuracy, and it is also difficult to adjust parameters. It is very time-consuming and labor-intensive, so the final effect of aerobic fermentation may not be very ideal;

At present, the temperature control accuracy of traditional on / off control is difficult to meet the requirements of the conditions; and although PID control is one of the typical industrial controls, its main difficulty lies in the adjustment of PID parameters. Continuous debugging to obtain a reasonable PID parameter to meet the system requirements, and because the PID parameters cannot be adjusted in real time and adaptively, and the temperature of the aerobic fermentation process is dynamically changing, thus affecting the effect of aerobic fermentation, resulting in There are many shortcomings such as low fermentation temperature of manure, long fermentation cycle, incomplete harmless treatment, etc.

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