Disturbance observer based control presentstion

Disturbance observer based control

1. TITLE: DIDSTURBANCE OBSERVER BASED ANTI DISTURBANCE CONTROL Name: Sayantan Halder Roll no: 002110801231 Electrical engineering department , Jadavpur University

2. ABOUT THE TOPIC Disturbance-observer-based control (DOBC) methods have been researched and applied in various industrial sectors in the last four decades. In all of these methods, disturbance and uncertainty are, in general, lumped together, and an observation mechanism is employed to estimate the total disturbance. This DOBC method is widely used in mechatronic systems to counter external disturbances like variation of load torque and pivot frictions . In aerospace systems it is used in missile systems ,space satellites .

3. MOTIVATION Disturbances and uncertainties widely exist in all industrial systems and bring adverse effects on performance and even stability of control systems . Disturbance and uncertainty rejection is a key objective in control system design. When a disturbance is measurable, a feedforward strategy could attenuate or eliminate the influence of disturbance. However, quite often, the external disturbance cannot be directly measured or is too expensive to measure. DOBC aims to estimate and compensate for these disturbances, enhancing closed-loop performance.  

4. WEEKLY PLAN Frequency domain design of DOBC Linear and non linear disturbance observer based control Linear and non linear disturbance and uncertainty estimation and attenuation Application

5. PROBABLE CONTENTS Introduction Linear disturbance and uncertainty estimation methods Non Linear disturbance and uncertainty estimation methods Disturbance and uncertainty attenuation Application Conclusion

6. REFERENCES L. L. Xie and L. Guo, "How much uncertainty can be dealt with by feedback?", IEEE Trans. Autom . Control, vol. 45, pp. 2203-2217, Dec. 200  Z. Gao, "On the centrality of disturbance rejection in automatic control", ISA Trans., vol. 4, no. 53, pp. 850-857, Jul. 2014.   S. H. Li, J. Yang, W.-H. Chen and X. S. Chen, Disturbance Observer Based Control: Methods and Applications, Boca Raton, FL, USA:CRC Press, 2014. K. Ohishi , M. Nakao, K. Ohnishi and K. Miyachi, "Microprocessor-controlled dc motor for load-insensitive position servo system", IEEE Trans. Ind. Electron., vol. 34, no. 1, pp. 44-49, Feb. 1987.