Fig. 1. Photograph of LADRC controller structure

Fig. 2. Photograph of temperature control scheme and probe

Fig. 3. Left and right temperature control scheme curve

Fig. 4. Four sides temperature control scheme curve

Fig. 5. Front and behind temperature control scheme curves

Fig. 6. Diagram of system structure

Fig. 7. Control performance comparison between LADRC and PID

Fig. 8. Differential signal tracking curves

Fig. 9. Photograph of hardware systerm composition

Fig. 10. Overshoot comparison between LADRC and PID

Fig. 11. Stability comparison between LADRC and PID

Fig. 12. Response time comparison between LADRC and PID