High-precision control method for mine filling slurry concentration

Abstract

The invention relates to a high-precision control method for mine filling slurry concentration. The method comprises the following steps of: describing a slurry production process by adopting a third-order lag system, and decomposing the system into two small systems, namely an aggregate conveying process and an aggregate and cement stirring process; and establishing a control-oriented augmented error system without time lag in form by introducing errors and new variables. On the basis, a control law of the stirring process and a control law of the conveying process are designed by applying anoptimal control theory respectively. According to the method, the characteristics of the system and future information of an output target signal are fully utilized, so that the fluctuation of the slurry concentration can be effectively reduced, a guarantee is provided for high-quality filling, and the technical problem of control in the current mine filling slurry production process is solved. The method aims at engineering practical problems, and the achievement provides a theoretical reference for mine filling slurry production and has important application value for reducing the slurry concentration fluctuation and improving the filling quality.

Description

technical field [0001] The invention relates to the technical field of process control, in particular to a method for controlling the concentration of mine filling slurry with high precision. Background technique [0002] At present, with the rapid development of my country's economy, the society's demand for mineral resources is increasing day by day. However, the damage to the environment and the discharge of waste from the mining of mineral resources have become more and more serious, which has greatly affected the natural ecological environment of our country and even hindered the economic development of the development areas. As the country pays more and more attention to the sustainable development of the economy, it has increased the intensity of environmental protection, requiring mining enterprises to pay attention to the transformation of production technology, and to unify economic benefits and environmental protection. [0003] The filling mining method is a new...

AI Technical Summary

Problems solved by technology

[0006] (1) PID control is a deviation-based method. It directly constructs a control law based on the deviation between the target output and the actual output of the controlled object. Although it is simple but not completely reasonable, it may cause the initial error of the system to be very large, thereby making the initial control of the system difficult. The effect is very large, resulting in serious overshoot

In addition, due to the lack of a systematic mathematical model, it is difficult to set the proportional coefficient, integral coefficient and differential coefficient. In practice, these three coefficients are usually determined manually, which makes the system performance susceptible to the influence of the designer's engineering experience. Also affects the dynamic performance of the system

[0007] (2) The slurry production process is a large time-delay system. Due to the delay of the control action, PID control is used for it, so that when the controlled output of the system is affected by the disturbance and the control correction is not timely, the output is prone to fluctuations, and even affects the entire system. system stability

[0008] (3) Insufficient utilization of system information. PID control uses the current deviation signal to perform proportional and differential operations, and uses past information through integral operations. In combination, it only uses past and current information, and does not use the known conditions of the target signal. Utilize future information to affect the improvement of system control performance

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