scholarly journals Practical robust control using Self-regulation Nonlinear PID controller for pneumatic positioning system

2014 ◽  
Vol 1 (1) ◽  
Author(s):  
Sy Najib Sy Salim ◽  
M. F. Rahmat ◽  
N. H. Sunar ◽  
A. A. M. Faudzi ◽  
Z. H. Ismail ◽  
...  
Keyword(s):  
Robust Control ◽  
Pid Controller ◽  
Self Regulation ◽  
Positioning System ◽  
Nonlinear Pid Controller

scholarly journals Position Control of Pneumatic Actuator Using Self-Regulation Nonlinear PID

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Syed Najib Syed Salim ◽  
Mohd Fua’ad Rahmat ◽  
Ahmad ’Athif Mohd Faudzi ◽  
Zool H. Ismail ◽  
Noorhazirah Sunar
Keyword(s):  
Pid Controller ◽  
Position Control ◽  
Self Regulation ◽  
Nonlinear Function ◽  
Experimental Tests ◽  
Pneumatic Actuator ◽  
Rate Variation ◽  
Positioning System ◽  
Error Signal ◽  
Nonlinear Gain

The enhancement of nonlinear PID (N-PID) controller for a pneumatic positioning system is proposed to improve the performance of this controller. This is executed by utilizing the characteristic of rate variation of the nonlinear gain that is readily available in N-PID controller. The proposed equation, namely, self-regulation nonlinear function (SNF), is used to reprocess the error signal with the purpose of generating the value of the rate variation, continuously. With the addition of this function, a new self-regulation nonlinear PID (SN-PID) controller is proposed. The proposed controller is then implemented to a variably loaded pneumatic actuator. Simulation and experimental tests are conducted with different inputs, namely, step, multistep, and random waveforms, to evaluate the performance of the proposed technique. The results obtained have been proven as a novel initiative at examining and identifying the characteristic based on a new proposal controller resulting from N-PID controller. The transient response is improved by a factor of 2.2 times greater than previous N-PID technique. Moreover, the performance of pneumatic positioning system is remarkably good under various loads.

scholarly journals Enhanced self-regulation nonlinear PID for industrial pneumatic actuator

2019 ◽  
Vol 9 (4) ◽  
pp. 3015
Author(s):  
S. N S. Salim ◽  
M. F. Rahmat ◽  
L. Abdullah ◽  
S. A. Shamsudin ◽  
M. Zainon ◽  
...  
Keyword(s):  
Steady State ◽  
System Performance ◽  
Pid Controller ◽  
Dead Zone ◽  
Self Regulation ◽  
Nonlinear Function ◽  
Positioning System ◽  
Proportional Valve ◽  
Signal Error ◽  
Steady State Performance

<p class="3Abstract">The present article describes the improvement of Self-regulation Nonlinear PID (SN-PID) controller. A new function is introduced to improve the system performance in terms of transient without affecting the steady state performance. It is used to optimize the nonlinear function available on this controller.  The signal error is reprocessed through this function, and the result is used to tune the nonlinear function of the controller. Furthermore, the presence of the dead zone on the proportional valve is solved using Dead Zone Compensator (DZC). Simulations and experiments were carried out on the pneumatic positioning system. Comparisons between the existing methods were examined and successfully demonstrated.</p>

scholarly journals Robust Control of Steam Turbine System Speed Using Improved IMC Tuned PID Controller

2012 ◽  
Vol 38 ◽  
pp. 1450-1456 ◽  
Author(s):  
M.V. Subramanyam ◽  
K. Satya Prasad ◽  
P.V. Gopi Krishna Rao
Keyword(s):  
Robust Control ◽  
Steam Turbine ◽  
Pid Controller

A Nonlinear Feedback Control Scheme for Transient Performance Enhancement in Hard Disk Drives

2014 ◽  
Author(s):  
Minghui Zheng ◽  
Xu Chen ◽  
Masayoshi Tomizuka
Keyword(s):  
Steady State ◽  
Pid Controller ◽  
Control Algorithm ◽  
Hard Disk Drives ◽  
Hard Disk ◽  
Disk Drives ◽  
Transient Performance ◽  
Nonlinear Feedback ◽  
Nonlinear Pid Controller ◽  
Steady State Performance

This paper aims to develop a nonlinear control algorithm to break the limitations of linear PID controls and improve the transient performance during the short-span track seeking / settling in hard disk drives (HDDs). It is designed based on a baseline PID controller which is well-designed to obtain good track following performance. The control algorithm is a combination of a nonlinear PID controller and a nonlinear turbo controller (NTC): when the position error signal (PES) is large, NTC assists the nonlinear PID controller to rapidly reduce the error; when PES is small, NTC is turned off to avoid possible chattering and ensure good steady state performance. As PES becomes even smaller, the nonlinear PID controller is reduced to the baseline PID controller to keep good steady state performance.

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