Study of two-cell immune feedback control for water level of boiler drum based on gray prediction
Due to the ‘false water level’ phenomenon in power station makes the traditional control strategy can't be a good solution to the problem, a two-cell immune feedback control strategy based on gray prediction for water level of boiler drum in power station is proposed, which using the function of gray prediction with strong self-adaptability and advanced control functions, and learning from bio-feedback mechanism of the immune system and regulating rule of response process. Through lots of simulation studies, it can achieve a more satisfied control quality with strong robustness and anti-jamming capability. Meanwhile, the structure and algorithm of the control strategy are simple and easy to engineering implementation.
Design,Realization and Analysis of Immune Controller Based on Two-cell Adjustment
Based on a two-cell immune nonlinear feedback model and the characteristics of the control system,a two-cell artificial immune controller is designed,and its structure is given in this paper.Both theoretical research and simulation indicate that the system controlled with this immune controller can follow the invariable input without any error.Through simulations,the proposed immune control system is compared with the immune PID control system,and the simulation results show that the former is better than the latter in anti-delay,self-adaptation of object parameter change,etc.,and it is easy for the former to choose parameters.
Application of an Immune Feedback Mechanism to Control Systems.
As a control engineering application of a biological immune system, an immune feedback law featuring rapid response to foreign materials and quick stabilization of the immune system and a design method for an immune-mechanism-inspired feedback controller is described. Focusing on the T-cell regulated immune circuit, we propose an immune feedback law that includes both an active term to control the response speed and an inhibitive term to control the stabilization effect. We have also designed a PID-type immune-mechanism-inspired feedback controller based on both the immune feedback law and conventional PID control. Simulation results obtained for a discrete-time single-input single-output system show the feasibility of using the immune-mechanism-inspired feedback controller to control a nonlinear system and reveal the controller characteristics. Experimental results for velocity tracking control of a DC servo motor demonstrate the effectiveness of the immune-mechanism-inspired feedback controller for controlling a practical mechanical system even with existing nonlinear disturbances.