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| Pulp Consistency Control System Based on Variable Universe Fuzzy PID |
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| DOI：10.11980/j.issn.0254-508X.2019.01.008 |
| Key Words:pulp concentration variable universe fuzzy control Simulink |
| Fund Project:西京学院科研基金项目（XJ170129）。 |
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| Abstract:The traditional fuzzy PID controller cannot achieve precise control of pulp consistency due to fixed parameters such as variable universe， scale factor and quantization factor. A variable universe fuzzy PID control algorithm combining variable universe theory with fuzzy control PID control was proposed. In order to improve the control precision of the fuzzy controller， the domain range of the input and output variable of the fuzzy controller was adjusted in the fuzzy controller by introducing the domain scalability factor in the fuzzy controller. The variable universe fuzzy controller was used to adjust three parameters of PID to realize real-time online tuning of PID controller. The simulation results showed that the variable domain fuzzy PID control algorithm could effectively overcome the time-varying， multi interference and time-delay defects in the pulp consistency control process， and could achieve the stability and accuracy of pulp consistency control. Field application could control pulp consistency in the error within ±0.025%， indicating that the algorithm was feasible and adaptable． |
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