Energy Saving in Electro-Hydraulic System Using a MIMO Fuzzy Controller

Abstract:

Energy saving in the electro-hydraulic system (EHS) that currently exists in most inverter used to adjust speed of the asynchronous motor (ASM) which drive a fixed displacement pump. The most controller commonly used control system such as PID and multi-input single-output (MISO) fuzzy controller. In this paper, a multi-input multi-output (MIMO) fuzzy controller is used to improve the energy saving performance of the EHS. The proposed controller is designed to control the pressure of the EHS to suit the actual needs of the load. The two inputs of controller received signals from the error and change in error of the load pressure of the EHS. For the two outputs of the controller, one output is used to control the inverter to adjust speed of an ASM which drive hydraulic pump, and one output that is used for control proportional pressure relief valve. The proposed controller was implemented to pressure control of compression machine. The experimental result showed that using a proposed controller can reduce power consumption was higher than compared with PID and MISO fuzzy controllers. Particularly, a MIMO fuzzy controller can reduce power consumption by up to 70.22% when compared to the conventional system.

• Periodical: Advanced Materials Research (Volumes 622-623)
• Pages: 75-79
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.622-623.75
• Online since: December 2012
• Authors: Pornjit Pratumsuwan, Santi Hutamarn, Watcharin Po-Ngaen
• Keywords: Electro-Hydraulic System, Energy Saving, Mimo Fuzzy Controller

References

[1] Radek manasek, in: Simulation of a electrohydraulic Load-sensing system with ac motor and Frequency change, Czech Republic, Hamburg 2000, pp.311-324.

[2] Darko Lovree, Mitja Kastreve, and Samo Ulaga, in: Electro-hydraulic load sensing with a speed-controlled hydraulic supply system on forming-machines, International Journal Advanced Manufacturing Technology, Springer-Verlag London Limited (2008).

DOI: 10.1007/s00170-008-1553-y

[3] Medhat Abbas Shawky, Sadek Z. Kassab, Ihab Gaber Adam, and Nasr Aldin Abdel Moneim Tawfik, in: Using Frequency Inverter for Controlling and Saving Energy in Hydraulic Systems, European Journal of Scientific Research Vol. 74 No. 1 (2012), pp.33-47.

[4] M. Kastrevc, and R. Pusenjak, in: Fuzzy Pressure Control of Hydraulic System with Gear Pump Driven by Variable Speed Induction Electro-Motor, Experimental Technique Vol. 29, Issue3, (2006), pp.57-62.

DOI: 10.1111/j.1747-1567.2005.tb00219.x

[5] Takayuki Imamura, Yuzo Sawada, Masashi Ichikawa, and Hirokazu Nakamura, in: Energy-Saving Hybrid Hydraulic System Comprising Highly Efficient IPM Motor and Inverter for Injection Molding and Manufacturing Machine , Japan, 2008, pp.117-120.

DOI: 10.5739/isfp.2008.117