Feedforward Plus Feedback Control of an Electro-Hydraulic Valve System Using a Proportional Control Valve
The output feedback signal of the electro-hydraulic valve system (EHVS) affects the activation of its right or left envelope function; thus, even weak measurement noise can cause high-frequency switching between the two envelope functions, leading to chattering in the control input. Consequently, fe...
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doaj-332f4f922d894797bc0ef487f6bd475a2020-11-25T02:30:12ZengMDPI AGActuators2076-08252020-06-019454510.3390/act9020045Feedforward Plus Feedback Control of an Electro-Hydraulic Valve System Using a Proportional Control ValveYoung-Rae Ko0Tae-Hyoung Kim1Department of Mechanical Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, KoreaDepartment of Mechanical Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, KoreaThe output feedback signal of the electro-hydraulic valve system (EHVS) affects the activation of its right or left envelope function; thus, even weak measurement noise can cause high-frequency switching between the two envelope functions, leading to chattering in the control input. Consequently, feedforward and feedback controllers in a cascaded configuration generate undesirable chattering in the output signal. We propose a practical and reliable control approach for an EHVS actuated by a proportional control valve. The proposed controller has a parallel structure comprising an inverse generalized Prandtl–Ishlinskii (P–I) model-based feedforward controller, with both hydraulic dead-zone and flow saturation limits, for compensating asymmetric hysteretic behavior. Further, the proposed controller comprises a robust proportional-integral-derivative (PID) feedback controller for achieving robustness against disturbances and noises. The proposed parallel structure is independent of the output feedback of the EHVS. Moreover, the proposed robust PID feedback controller guarantees EHVS stability by precisely selecting the cutoff frequency for the sensitivity and complementary sensitivity functions based on the amplitude spectrum of the inverse-model-based feedforward compensation error. The results verify the high reliability of the proposed EHVS control scheme for the precise control of an EHVS actuated by a proportional control valve in practice.https://www.mdpi.com/2076-0825/9/2/45asymmetric hysteresiselectro-hydraulic valve systeminverse generalized Prandtl–Ishlinskii modelproportional control valverobust proportional-integral-derivative control |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Young-Rae Ko Tae-Hyoung Kim |
spellingShingle |
Young-Rae Ko Tae-Hyoung Kim Feedforward Plus Feedback Control of an Electro-Hydraulic Valve System Using a Proportional Control Valve Actuators asymmetric hysteresis electro-hydraulic valve system inverse generalized Prandtl–Ishlinskii model proportional control valve robust proportional-integral-derivative control |
author_facet |
Young-Rae Ko Tae-Hyoung Kim |
author_sort |
Young-Rae Ko |
title |
Feedforward Plus Feedback Control of an Electro-Hydraulic Valve System Using a Proportional Control Valve |
title_short |
Feedforward Plus Feedback Control of an Electro-Hydraulic Valve System Using a Proportional Control Valve |
title_full |
Feedforward Plus Feedback Control of an Electro-Hydraulic Valve System Using a Proportional Control Valve |
title_fullStr |
Feedforward Plus Feedback Control of an Electro-Hydraulic Valve System Using a Proportional Control Valve |
title_full_unstemmed |
Feedforward Plus Feedback Control of an Electro-Hydraulic Valve System Using a Proportional Control Valve |
title_sort |
feedforward plus feedback control of an electro-hydraulic valve system using a proportional control valve |
publisher |
MDPI AG |
series |
Actuators |
issn |
2076-0825 |
publishDate |
2020-06-01 |
description |
The output feedback signal of the electro-hydraulic valve system (EHVS) affects the activation of its right or left envelope function; thus, even weak measurement noise can cause high-frequency switching between the two envelope functions, leading to chattering in the control input. Consequently, feedforward and feedback controllers in a cascaded configuration generate undesirable chattering in the output signal. We propose a practical and reliable control approach for an EHVS actuated by a proportional control valve. The proposed controller has a parallel structure comprising an inverse generalized Prandtl–Ishlinskii (P–I) model-based feedforward controller, with both hydraulic dead-zone and flow saturation limits, for compensating asymmetric hysteretic behavior. Further, the proposed controller comprises a robust proportional-integral-derivative (PID) feedback controller for achieving robustness against disturbances and noises. The proposed parallel structure is independent of the output feedback of the EHVS. Moreover, the proposed robust PID feedback controller guarantees EHVS stability by precisely selecting the cutoff frequency for the sensitivity and complementary sensitivity functions based on the amplitude spectrum of the inverse-model-based feedforward compensation error. The results verify the high reliability of the proposed EHVS control scheme for the precise control of an EHVS actuated by a proportional control valve in practice. |
topic |
asymmetric hysteresis electro-hydraulic valve system inverse generalized Prandtl–Ishlinskii model proportional control valve robust proportional-integral-derivative control |
url |
https://www.mdpi.com/2076-0825/9/2/45 |
work_keys_str_mv |
AT youngraeko feedforwardplusfeedbackcontrolofanelectrohydraulicvalvesystemusingaproportionalcontrolvalve AT taehyoungkim feedforwardplusfeedbackcontrolofanelectrohydraulicvalvesystemusingaproportionalcontrolvalve |
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