Identification and Controller Tuning of Cascade Control Systems Based on Closed-Loop Step Responses

2012 ◽  
Vol 45 (15) ◽  
pp. 414-419 ◽  
Author(s):  
Jyh-Cheng Jeng ◽  
Ming-Wei Lee
Keyword(s):  
Control Systems ◽  
Closed Loop ◽  
Cascade Control ◽  
Controller Tuning ◽  
Step Responses

scholarly journals Closed Loop Tuning of Cascade Controllers Based on Setpoint Experiment

2020 ◽  
Vol 8 (4) ◽  
Author(s):  
Mohammad Atif Siddiqui ◽  
◽  
MN Anwar ◽  
SH Laskar ◽  
M Shamsuzzoha ◽  
...  
Keyword(s):  
Pid Controller ◽  
Closed Loop ◽  
Cascade Control ◽  
Peak Time ◽  
Process Data ◽  
Controller Tuning ◽  
Output Change ◽  
Pid Controller Tuning ◽  
Control Configuration ◽  
Loop Tuning

This study presents online PI/PID controller tuning rules for cascade control configuration. The necessary process data are determined with the help of a simple setpoint experiment in a single closed-loop mode with the proportional controller only. The obtained process data is recorded in terms of the overshoot, controller gain, peak time, and relative output change. The data is then utilized to establish a correlation with PI/PID settings through simulations. Further, the proposed PI/PID controller tuning rule for a single loop has been extended to the cascade control configuration. The inner loop controller is tuned first, and then the primary loop is tuned by considering a well-tuned inner loop as a part of the primary plant. Finally, simulation examples demonstrate that the proposed method delivers significant disturbance rejection and better setpoint response when compared to the recently reported methods from the literature. The proposed method is also able to deliver stable closed-loop performances when subjected to large parametric uncertainties and measurement noise.

EEG-FES-Force-MMG closed-loop control systems of a volunteer with paraplegia considering motor imagery with fatigue recognition and automatic shut-off

2021 ◽  
Vol 68 ◽  
pp. 102662
Author(s):  
Paulo Broniera Junior ◽  
Daniel Prado Campos ◽  
André Eugenio Lazzaretti ◽  
Percy Nohama ◽  
Aparecido Augusto Carvalho ◽  
...  
Keyword(s):  
Control Systems ◽  
Motor Imagery ◽  
Closed Loop ◽  
Closed Loop Control ◽  
Loop Control

Analysis of Reset Control Systems Consisting of a FORE and Second-Order Loop1

2001 ◽  
Vol 123 (2) ◽  
pp. 279-283 ◽  
Author(s):  
Qian Chen ◽  
Yossi Chait ◽  
C. V. Hollot
Keyword(s):  
Control Systems ◽  
Closed Loop ◽  
Second Order ◽  
Step Response ◽  
Steady State Response ◽  
First Order ◽  
State Response ◽  
Loop Transfer Function ◽  
Performance Specifications ◽  
Reset Control

Reset controllers consist of two parts—a linear compensator and a reset element. The linear compensator is designed, in the usual ways, to meet all closed-loop performance specifications while relaxing the overshoot constraint. Then, the reset element is chosen to meet this remaining step-response specification. In this paper, we consider the case when such linear compensation results in a second-order (loop) transfer function and where a first-order reset element (FORE) is employed. We analyze the closed-loop reset control system addressing performance issues such as stability, steady-state response, and transient performance.

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