Active control of turbine tip clearance by fuzzy parameter self-setting PID algorithms

Improved blade tip clearance management in high pressure turbine can provide dramatic improvements in specific fuel consumption (SFC), time on wing, engine efficiency, increased payload and mission range capabilities. In order to achieve the goal that keeping clearance at desired operating point in complete flight process, the active tip clearance control system was analysis firstly, and then a controller based on fuzzy algorithm was designed; An innovative piezoelectric actuator was provided, and then the actuating system be modeled as a second-order mass-spring-damper system for verified the performance of the controller. The simulation result shows: fuzzy self-setting controller can track the tip clearance changes accurately.