Abstract
To study the electric actuator, a model is established with backlash nonlinearity and equivalent rigidity considered. Applying the describing function, the limit cycle of the actuator system is analyzed, and the characteristics of the limit cycle's frequency and amplitude are also analyzed. A method adding negative feedback moment to the load is proposed. The feedback moment can suppress the limit cycle of the actuator by changing the motion state of the load. The effect of the feedback moment to the servo system is analyzed and the principle of the feedback coefficient is given. The simulation results show the effectiveness of the describing function in predicting the limit cycle in the nonlinear system, and the proposed method does not affect the servo performance of the system and the negative feedback moment is valid in suppressing the limit cycle of the electric actuator with the backlash nonlinearity.
| Translated title of the contribution | Analysis and suppression of the limit cycle about electric actuator |
|---|---|
| Original language | Chinese (Traditional) |
| Pages (from-to) | 773-778 |
| Number of pages | 6 |
| Journal | Xi Tong Gong Cheng Yu Dian Zi Ji Shu/Systems Engineering and Electronics |
| Volume | 43 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Mar 2021 |