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

2012 ◽  
Vol 622-623 ◽  
pp. 75-79 ◽  
Author(s):  
Pornjit Pratumsuwan ◽  
Santi Hutamarn ◽  
Watcharin Po-Ngaen
Keyword(s):  
Power Consumption ◽  
Energy Saving ◽  
Hydraulic System ◽  
Fuzzy Controller ◽  
Asynchronous Motor ◽  
Pressure Control ◽  
Experimental Result ◽  
Relief Valve ◽  
Load Pressure ◽  
Reduce Power Consumption

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.

Steady State Characteristics of a Flapper-Nozzle Relief Valve

1987 ◽  
Vol 201 (2) ◽  
pp. 135-144 ◽  
Author(s):  
J S Yun ◽  
H S Cho
Keyword(s):  
Steady State ◽  
Pressure Control ◽  
Effective Area ◽  
Body Motion ◽  
Model Parameters ◽  
Dynamics Model ◽  
Relief Valve ◽  
Load Pressure ◽  
Hydraulic Load ◽  
The Relationship

The static and dynamic characteristics of flapper-nozzle type electromagnetic relief valves have not so far been investigated analytically in depth, although they have been widely used for hydraulic load pressure control. In this paper a non-linear model of the relief valve is formulated explicitly, based upon rigid-body motion and fluid dynamics. Model parameters such as discharge coefficients, effective area of the nozzle and the electromagnetic constant were identified from the steady state characteristics and physical dimensions of the valve. Based upon this constructed model the static characteristics such as the pressure override and the relationship between input current and main pressure were obtained analytically and compared with those obtained experimentally. The comparison shows that this constructed analytical model can precisely predict such characteristics.

Computational fluid dynamics and experimental analysis of the influence of the energy recovery unit on the proportional relief valve

2017 ◽  
Vol 232 (4) ◽  
pp. 697-705 ◽  
Author(s):  
Tianliang Lin ◽  
Qiang Chen ◽  
Haoling Ren ◽  
Ruoxi Lv ◽  
Chen Miao ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Steady State ◽  
Energy Loss ◽  
Hydraulic System ◽  
Energy Recovery ◽  
Pressure Control ◽  
Steady State Flow ◽  
Relief Valve ◽  
Recovery Unit ◽  
Line Pressure

The overflow energy loss in relief valve, which is one of the main reasons leading to the low efficiency of the hydraulic system, had been considered to be impossible to solve. The principle of the overflow energy loss of the relief valve is analyzed and a novel method to reduce the overflow loss using an energy recovery unit, which can improve the return line pressure of the pilot proportional relief valve, is proposed. The influence of the energy recovery unit on the pressure control characteristics and steady-state flow force of the pilot proportional relief valve are discussed. The effects of the return line pressure on the distribution of the flow field and the pressure control characteristics are analyzed through computational fluid dynamics simulation and experiment. The results show that with the increase of the return line pressure, the displacement of the main valve spool increases and the reset spring force increases accordingly. While the steady-state flow force decreases dramatically with the increase of the return line pressure, which results in a smaller pressure differential the pressure differential can be reduced from 15% to 2.5%. It is also observed that the flow rate of the pilot proportional relief valve can be maintained at a certain value with a small oscillation and that the pilot proportional relief valve can release the redundant flow of hydraulic system. This verifies that the pilot proportional relief valve with the outlet connecting to the energy recovery unit to recovery the overflow energy loss cannot reduce the pressure control characteristics, but can achieve a better pressure control accuracy of the pilot proportional relief valve.

Energy Saving in Electro-Hydraulic System Using Adaptive Neuro-Fuzzy Controller

2013 ◽  
Vol 278-280 ◽  
pp. 1451-1458
Author(s):  
Kwanchai Sinthipsomboon ◽  
Issaree Hunsacharoonroj ◽  
Joseph Khedari ◽  
Po Ngaen Watcharin
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Energy Saving ◽  
Hydraulic System ◽  
Power Flow ◽  
Fuzzy Controller ◽  
Nonlinear Effects ◽  
Experiment Study ◽  
Neuro Fuzzy ◽  
Potential Improvement

In industrial machinery units in which handle with high loads, hydraulic actuators are often used to actuate the manipulators. The nonlinear effects of the hydraulic system can be a problem if they disturb the energy efficiency of the hydraulic system. In this study, a designed Adaptive neuro-fuzzy Controller for electro-hydraulic system is developed to reduce the energy consumption. An intelligent neuro-fuzzy controller is employed to optimize the quantitative energy of fluid power flow of hydraulic system by the rotation of the electric motor via an inverter. Results of experiment study are presented showing the potential improvement in term of energy saving and pressure servo performance offered by this method.

Constant Pressure Control for Energy Efficient Lathe Turret

2015 ◽  
Vol 661 ◽  
pp. 3-9
Author(s):  
Jyh Chyang Renn ◽  
Wen Jen Hsu ◽  
Yun Ruei Li
Keyword(s):  
Dynamic Response ◽  
Energy Saving ◽  
Energy Efficient ◽  
Constant Pressure ◽  
Pressure Control ◽  
Gear Pump ◽  
Relief Valve ◽  
Controlled System ◽  
Control Scheme ◽  
New Energy

Hydraulic system plays an important role in many power systems such as excavator, braking system of vehicle and machine tool. Generally speaking, hydraulic control system can be divided into two different driving concepts. The first one is the well-known valve-controlled system and the second one is the pump-controlled system. The former possesses the feature of fast dynamic response. However, the poor energy-saving performance is its major fault. On the contrary, the pump-controlled system has the significant advantage of energy-saving which meets the current demand in modern machine design, but has the disadvantage of slower dynamic response. With the advancement of electric-motor system, however, this disadvantage has been greatly improved. In this paper, the simulation analysis of a newly developed energy-efficient hydraulic CNC lathe turret based on constant pressure control scheme is presented. Instead of the conventional fixed displacement hydraulic pump, the new energy-efficient system utilizes an internal gear pump together with an AC servo motor as its driving power source. In addition, a closed-loop control scheme using PID control is adopted. From simulation results, the new energy-efficient design can reduce the waste of the output flow-rate of the pump through the relief valve that generally happens in conventional hydraulic lathe and then achieve the purpose of designing an energy-efficient hydraulic lathe.

A Hybrid of Force and Position Control with Energy Saving in the Electro-Hydraulic System

2013 ◽  
Vol 717 ◽  
pp. 557-562 ◽  
Author(s):  
Pratumsuwan Pornjit ◽  
Junchangpood Aphaiwong
Keyword(s):  
Hydraulic System ◽  
Position Control ◽  
Fuzzy Controller ◽  
Control Valve ◽  
Hydraulic Press ◽  
Superior Performance ◽  
Pid Controllers ◽  
Gear Pump ◽  
Control Force ◽  
Relief Valve

Generally, the electro-hydraulic system (EHS) has force and position controls. The control of these parameters to the desired value multiple PID controllers are often used, which are sensitive to changes in system parameters. In addition, the existing EHS is often used as a single proportional direction control valve (PDCV) to control those parameters that cause loss and waste energy. Therefore, in this paper, a fuzzy controller is proposed to control force and position. Simultaneously, the EHS that is used for control will be added the inverter to adjust the speed of the electric motor (EM) to drive a fixed displacement gear pump, and a proportional pressure relief valve (PPRV), in order to save energy. A proposed fuzzy controller and the EHS are implemented to the hydraulic press. The experimental results showed that the hybrid of force and position control by using a fuzzy controller has a superior performance compared to the multiple PID controllers. Moreover, the proposed EHS is also more effective in saving power consumption than conventional EHS.

scholarly journals Static Characteristics of Pressure Control Valve

2017 ◽  
Vol 67 (1) ◽  
pp. 119-124
Author(s):  
Ondřej Vykoukal ◽  
Lumír Hružík ◽  
Adam Bureček
Keyword(s):  
Experimental Measurement ◽  
Hydraulic System ◽  
Check Valve ◽  
Control Valve ◽  
Pressure Control ◽  
Static Characteristics ◽  
Hydraulic Pump ◽  
Relief Valve ◽  
Pressure Control Valve

Abstract The article deals with the measurement of static characteristics of a pressure control valve. The pressure, at which the valve starts to leak oil, is adjusted by a spring. The measurement is performed on a hydraulic system that consists of tank, hydraulic pump, check valve, relief valve and pressure control valve which is measured. The results of this experimental measurement are Δp - Q characteristics of the pressure control valve for various pressure settings.

A Proposal of Cyclic Sleep Control Technique for Backup Resources in ROADM Systems to Reduce Power Consumption of Photonic Network

2014 ◽  
Vol E97.B (12) ◽  
pp. 2698-2705
Author(s):  
Tomoyuki HINO ◽  
Hitoshi TAKESHITA ◽  
Kiyo ISHII ◽  
Junya KURUMIDA ◽  
Shu NAMIKI ◽  
...  
Keyword(s):  
Power Consumption ◽  
Control Technique ◽  
Reduce Power Consumption ◽  
Photonic Network ◽  
Sleep Control

A Neuro-Fuzzy Controller for Doubly FED Asynchronous Motor Drive

2010 ◽  
Vol 4 (1) ◽  
pp. 8-15
Author(s):  
Azeddine Chaiba ◽  
◽  
Rachid Abdessemed ◽  
M. Lokmen Bendaas ◽  
◽  
...  
Keyword(s):  
Fuzzy Controller ◽  
Asynchronous Motor ◽  
Motor Drive ◽  
Neuro Fuzzy ◽  
Doubly Fed

scholarly journals Improvements in Energy Saving and Thermal Environment after Retrofitting with Interior Insulation in Intermittently Cooled Residences in Hot-Summer/Cold-Winter Zone of China: A Case Study in Chengdu

Energies ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2776
Author(s):  
Xin Ye ◽  
Jun Lu ◽  
Tao Zhang ◽  
Yupeng Wang ◽  
Hiroatsu Fukuda
Keyword(s):  
Energy Saving ◽  
Thermal Environment ◽  
Real Life ◽  
Average Energy ◽  
Experimental Result ◽  
Cold Winter ◽  
The South ◽  
Indoor Thermal Environment ◽  
Space Cooling

Space cooling is currently the fastest-growing end-user in buildings. The global warming trend combined with increased population and economic development will lead to accelerated growth in space cooling in the future, especially in China. The hot summer and cold winter (HSCW) zone is the most densely populated and economically developed region in China, but with the worst indoor thermal environment. Relatively few studies have been conducted on the actual measurements in the optimization of insulation design under typical intermittent cooling modes in this region. This case study was conducted in Chengdu—the two residences selected were identical in design, but the south bedroom of the case study residence had interior insulation (inside insulation on all opaque interior surfaces of a space) retrofitted in the bedroom area in 2017. In August 2019, a comparative on-site measurement was done to investigate the effect of the retrofit work under three typical intermittent cooling patterns in the real-life scenario. The experimental result shows that interior insulation provides a significant improvement in energy-saving and the indoor thermal environment. The average energy savings in daily cooling energy consumption of the south bedroom is 42.09%, with the maximum reaching 48.91%. In the bedroom with interior insulation retrofit, the indoor temperature is closer to the set temperature and the vertical temperature difference is smaller during the cooling period; when the air conditioner is off, the room remains a comfortable temperature for a slightly longer time.

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