All-PD control of pure Integrating Plus Time-Delay processes with gain and phase-margin specifications
Sudipta Chakraborty1, Sandip Ghosh2, Asim Kumar Naskar1
1Department of Electrical Engineering, National Institute of Technology Rourkela, 769008, India.
ISA Transactions
|February 14, 2017
Summary
A novel all-PD control structure improves regulatory and servo responses for Integrating Plus Time-Delay (IPTD) processes. This method overcomes limitations of traditional PD controllers and integral actions, validated experimentally.
Area of Science:
- Control Engineering
- Process Control
- Automation Systems
Background:
- Proportional-Derivative (PD) controllers offer good servo response but struggle with regulatory performance in Integrating Plus Time-Delay (IPTP) processes.
- Integral control actions can result in significant overshoot and extended settling times, compromising overall system stability and efficiency.
Purpose of the Study:
- To introduce a new all-PD control structure designed to enhance both servo and regulatory responses for IPTD processes.
- To address the performance deficiencies of existing control strategies in handling IPTD systems.
Main Methods:
- Development of design formulas for the all-PD controller based on gain-margin and phase-margin specifications.
- Systematic derivation of control parameters to meet desired performance criteria.
Main Results:
- The proposed all-PD control structure effectively achieves satisfactory servo and regulatory responses for IPTD processes.
- Numerical examples demonstrate the practical application and effectiveness of the design methodology.
Conclusions:
- The new all-PD control structure presents a viable solution for improving control performance in IPTD systems.
- Experimental validation on a temperature control process confirms the theoretical findings and practical applicability of the proposed method.
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