From PID to Active Disturbance Rejection Control
Top Cited Papers
- 27 February 2009
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Industrial Electronics
- Vol. 56 (3), 900-906
- https://doi.org/10.1109/tie.2008.2011621
Abstract
Active disturbance rejection control (ADRC) can be summarized as follows: it inherits from proportional-integral-derivative (PID) the quality that makes it such a success: the error driven, rather than model-based, control law; it takes from modern control theory its best offering: the state observer; it embraces the power of nonlinear feedback and puts it to full use; it is a useful digital control technology developed out of an experimental platform rooted in computer simulations. ADRC is made possible only when control is taken as an experimental science, instead of a mathematical one. It is motivated by the ever increasing demands from industry that requires the control technology to move beyond PID, which has dominated the practice for over 80 years. Specifically, there are four areas of weakness in PID that we strive to address: 1) the error computation; 2) noise degradation in the derivative control; 3) oversimplification and the loss of performance in the control law in the form of a linear weighted sum; and 4) complications brought by the integral control. Correspondingly, we propose four distinct measures: 1) a simple differential equation as a transient trajectory generator; 2) a noise-tolerant tracking differentiator; 3) the nonlinear control laws; and 4) the concept and method of total disturbance estimation and rejection. Together, they form a new set of tools and a new way of control design. Times and again in experiments and on factory floors, ADRC proves to be a capable replacement of PID with unmistakable advantage in performance and practicality, providing solutions to pressing engineering problems of today. With the new outlook and possibilities that ADRC represents, we further believe that control engineering may very well break the hold of classical PID and enter a new era, an era that brings back the spirit of innovations.Keywords
This publication has 7 references indexed in Scilit:
- Improving Disturbance-Rejection Performance Based on an Equivalent-Input-Disturbance ApproachIEEE Transactions on Industrial Electronics, 2008
- Comments on Active Disturbance Rejection ControlIEEE Transactions on Industrial Electronics, 2007
- Improved Coordinated Response and Disturbance Rejection in the Critical Sections of Paper MachinesIEEE Transactions on Industry Applications, 2007
- A DSP-Based Active Disturbance Rejection Control Design for a 1-kW H-Bridge DC–DC Power ConverterIEEE Transactions on Industrial Electronics, 2005
- Automatic Disturbances Rejection Controller for Precise Motion Control of Permanent-Magnet Synchronous MotorsIEEE Transactions on Industrial Electronics, 2005
- Disturbance-Rejection High-Precision Motion Control of a Stewart PlatformIEEE Transactions on Control Systems Technology, 2004
- An alternative paradigm for control system designPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2003