Modeling and Control of a Novel Linear-Driven Electro-Hydrostatic Actuator Using Energetic Macroscopic Representation

2018 ◽  
Vol 140 (7) ◽  
Author(s):  
Zongxia Jiao ◽  
Zimeng Wang ◽  
Xinglu Li
Keyword(s):  
Power Flow ◽  
Control Structure ◽  
Hydraulic Cylinder ◽  
Graphical Modeling ◽  
Modeling Tool ◽  
Modeling And Control ◽  
Actuation System ◽  
Spool Valves ◽  
And Control

Energetic macroscopic representation (EMR) is an effective graphical modeling tool for multiphysical systems, and EMR model clearly illustrates the power flow and interaction between different subcomponents. This paper presents the modeling and control of a novel linear-driven electro-hydrostatic actuator (LEHA) with EMR method. The LEHA is a novel electro-hydrostatic actuation system, and the hydraulic cylinder in LEHA is driven by a novel collaborative rectification pump (CRP), which incorporates two miniature cylinders and two spool valves. EMR model clearly illustrated the powertrain in LEHA and interaction between each components. Based on EMR model, a maximum control structure (MCS) is easily deduced using the action and reaction principle, and then the practicable controller deduced from MCS shows satisfying performance in the simulation.

The Modeling and Control of the Hydraulic Servo System by Using On-Off Valve

2000 ◽  
Author(s):  
Xuanyin Wang
Keyword(s):  
Servo System ◽  
Mathematic Model ◽  
Hydraulic Cylinder ◽  
Servo Control ◽  
Linear Quadratic ◽  
Modeling And Control ◽  
Hydraulic Servo ◽  
Self Tuning ◽  
Hydraulic Servo System ◽  
And Control

Abstract This paper researches on the hydraulic servo system by using ordinary on-off valves. The mathematic model of an asymmetric hydraulic cylinder servo control system is built, and its characteristic is analysed here. To reduce the static and dynamic characteristic differences between forward and reverse motion of asymmetric cylinder, and improve system’s performance, a self-tuning linear quadratic gaussian optimum controller (SLQG) is designed successful. In the end, an asymmetric hydraulic cylinder servo system of paint robot is researched. The result shows that the above method is effective.

scholarly journals Modeling and Control of a Novel Hybrid Power Quality Compensation System for 25-kV Electrified Railway

Energies ◽  
2019 ◽  
Vol 12 (17) ◽  
pp. 3303 ◽  
Author(s):  
Minwu Chen ◽  
Yinyu Chen ◽  
Mingchi Wei
Keyword(s):  
Power Quality ◽  
Power Flow ◽  
Reactive Power ◽  
Compensation System ◽  
Modeling And Control ◽  
Voltage Unbalance ◽  
Hybrid Power ◽  
Traction Power Supply System ◽  
Traction Power Supply ◽  
And Control

The severe power quality problems aroused by the single-phase 25-kV traction power supply system (TPSS), especially for the voltage unbalance (VU) and high-frequency harmonic resonance, have attracted increasing attention nowadays. In this paper, a novel hybrid power quality compensation system, including a power flow controller (PFC) and thyristor-controlled L and C-type filter (TCL-CTF), is proposed. The PFC can be used for VU compensation, and the TCL-CTF can be designed to filter out harmonics as well as compensate reactive power. Furthermore, an optimized compensation strategy is proposed, and the power quality of the TPSS can meet the requirements of the technology standard. Compared with the conventional scheme, the compensation capacity of the PFC can be reduced by 12%, as well as the cost. Finally, the effectiveness of the proposed system is verified by the simulation and experimental results.

scholarly journals Modeling and Control of an Electromagnetic Variable Valve Actuation System

2015 ◽  
Vol 20 (6) ◽  
pp. 2654-2665 ◽  
Author(s):  
Brian A. Paden ◽  
Shaun T. Snyder ◽  
Brad E. Paden ◽  
Michael R. Ricci
Keyword(s):  
Modeling And Control ◽  
Variable Valve Actuation ◽  
Actuation System ◽  
Variable Valve ◽  
And Control ◽  
Valve Actuation
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