Volume 9 Number 5
October 2012
Article Contents
Vineet Kumar, B. C. Nakra and A. P. Mittal. Some Investigations on Fuzzy P + Fuzzy I + Fuzzy D Controller for Non-stationary Process. International Journal of Automation and Computing, vol. 9, no. 5, pp. 449-457, 2012. doi: 10.1007/s11633-012-0666-9
Cite as: Vineet Kumar, B. C. Nakra and A. P. Mittal. Some Investigations on Fuzzy P + Fuzzy I + Fuzzy D Controller for Non-stationary Process. International Journal of Automation and Computing, vol. 9, no. 5, pp. 449-457, 2012. doi: 10.1007/s11633-012-0666-9

Some Investigations on Fuzzy P + Fuzzy I + Fuzzy D Controller for Non-stationary Process

Author Biography:
  • B. C. Nakra received his Ph.D. degree from Imperial College of Science and Technology, London, and started his academic career at Indian Institute of Technology, Delhi. He has also worked as a professor of eminence in Division of Instrumentation & Control Engineering at Netaji Subhas Institute of Technology (NSIT), Delhi. He has been involved in teaching and research for over four decades.He is presently a professor of eminence, Mechanical and Automobile Engineering Department at the Institute of Technology and Management, University Gurgaon, Haryana, India. His research interests include vibration engineering, system dynamics, instrumentation, automatic controls, mechatronics, and engineering design. E-mail: bcnakra@gmail.com

  • Corresponding author: Vineet Kumar
  • Received: 2011-09-20
通讯作者: 陈斌, bchen63@163.com
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Some Investigations on Fuzzy P + Fuzzy I + Fuzzy D Controller for Non-stationary Process

  • Corresponding author: Vineet Kumar

Abstract: The paper addresses the adaptive behaviour of parallel fuzzy proportional plus fuzzy integral plus fuzzy derivative (FP+FI+FD) controller. The parallel FP+FI+FD controller is actually a non-linear adaptive controller whose gain changes continuously with output of the process under control. Two non-stationary processes, whose characteristics change with time, are considered for simulation study. Simulation is performed using software LabVIEWTM. The set-point tracking response of parallel FP+FI+FD is compared with conventional parallel proportional plus integral plus derivative (PID) controller, tuned with the Ziegler-Nichols (Z-N) tuning technique. Simulation results show that conventional PID controller fails to track the set-point and becomes unstable as the process changes its characteristic with time. But the parallel FP+FI+FD controller shows considerably much better set-point tracking response and does not deviate from steady state. Also, a huge spike is observed in the output of PID controller as the reference set-point and process parameters are changed, while the FP+FI+FD controller gives spike free control signal.

Vineet Kumar, B. C. Nakra and A. P. Mittal. Some Investigations on Fuzzy P + Fuzzy I + Fuzzy D Controller for Non-stationary Process. International Journal of Automation and Computing, vol. 9, no. 5, pp. 449-457, 2012. doi: 10.1007/s11633-012-0666-9
Citation: Vineet Kumar, B. C. Nakra and A. P. Mittal. Some Investigations on Fuzzy P + Fuzzy I + Fuzzy D Controller for Non-stationary Process. International Journal of Automation and Computing, vol. 9, no. 5, pp. 449-457, 2012. doi: 10.1007/s11633-012-0666-9
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