一种电极系统无模型滑模自适应控制及阻尼估计增强方法
By employing a model-free sliding mode adaptive control method in an electric fused magnesium furnace, combined with sliding mode disturbance observation and damped pseudo-gradient estimation, the problem of insufficient anti-disturbance capability of traditional PID controllers in electric fused magnesium furnaces is solved, achieving high-precision, low-chattering electrode current control and improving the robustness and smoothness of the system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHENYANG JIANZHU UNIVERSITY
- Filing Date
- 2026-05-12
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional PID controllers in fused magnesium furnaces are unable to effectively cope with the complex operating conditions of highly nonlinear and rapidly changing systems due to their fixed structure and limited disturbance resistance. Existing improved PID controllers still suffer from switching jitter and disturbance compensation lag. Simple model-free adaptive control lacks robustness, pseudo-gradient estimation is prone to chattering, and rule-based intelligent control lacks adaptability and cannot cope with dynamically changing operating conditions.
A model-free sliding mode adaptive control method is adopted, combined with a partial scheme dynamic linearized data model, and a terminal sliding surface containing an exponentially decaying integral term and a double power-law approaching law is designed. A sliding mode disturbance observer and a sliding mode damped pseudo-gradient estimate are introduced. By online estimation and feedforward compensation of unknown disturbances, a sliding mode damped pseudo-gradient estimation method is constructed to suppress high-frequency oscillations.
It achieves high-precision, robust, and low-jitter control of electrode current, significantly improving tracking accuracy and anti-interference capability, optimizing control smoothness, reducing energy consumption, and extending equipment life.
Smart Images
Figure CN122172540B_ABST