Optimal design of a compound hybrid system consisting of torque coupling and energy regeneration for hydraulic hybrid excavator

2015 ◽  
Author(s):  
Yang Xiao ◽  
Cheng Guan ◽  
Perry Y. Li ◽  
Fei Wang
Keyword(s):  
Optimal Design ◽  
Hybrid System ◽  
Energy Regeneration ◽  
Hydraulic Hybrid ◽  
Hybrid Excavator

Optimal Control for the Series-Parallel Displacement Controlled Hydraulic Hybrid Excavator

2011 ◽  
Author(s):  
Joshua Zimmerman ◽  
Rohit Hippalgaonkar ◽  
Monika Ivantysynova
Keyword(s):  
Optimal Control ◽  
Fuel Consumption ◽  
Hybrid System ◽  
State Space Model ◽  
Optimal Controls ◽  
Parallel Displacement ◽  
Hydraulic Hybrid ◽  
Truck Loading ◽  
System States ◽  
Hybrid Excavator

In this paper a hydraulic hybrid system architecture for multi-actuator displacement controlled systems is analyzed. In particular the problem of optimal control for a hybrid excavator with four actuators is solved. The system states and controls are identified and classified into those which are cycle defined and those which are free to vary during the duty cycle. A state space model is derived for the hybrid system using the free states and controls and an outline of the algorithm used to apply dynamic programming to the system is described. The optimal controls and states for an aggressive truck loading cycle of the excavator are compared with suboptimal controls and states obtained using a rule based control strategy. Finally a comparison is made for the simulated fuel consumption of the system using optimal and suboptimal controls. A comparison is also made between the fuel consumption of the hybrid and non-hybrid excavators.

scholarly journals Technical Solutions of Forest Machine Hybridization

Energies ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2793
Author(s):  
Václav Mergl ◽  
Zdravko Pandur ◽  
Jan Klepárník ◽  
Hrvoje Kopseak ◽  
Marin Bačić ◽  
...  
Keyword(s):  
Hybrid System ◽  
Technological Development ◽  
New Technology ◽  
Storage Device ◽  
Hydraulic Motor ◽  
Hybrid Propulsion ◽  
Hydraulic Hybrid ◽  
Drive Systems ◽  
Hydraulic Accumulator ◽  
Technical Solutions

The paper deals with the characteristics of three different types of power train hybridization of forest logging machines and with the benefits of reducing environmental impacts by comparing new technology with more conventional, older technology. New hybridization options that could be implemented in forestry machines are also discussed. The paper divides a hybrid solution into three classes based on the energy used in the system of hybridization. First is an electro-hybrid system that uses an electric motor and battery or different storage device. The second, a hydraulic hybrid system, is a solution with a hydraulic accumulator, hydraulic motor, and pump. The third system is a combination of the electro-hybrid and hydraulic-hybrid system. The current technical and technological development of hybrid drive systems, as well as their components, has led to significant improvements in drive performance and thus better performance of the new generation of forest vehicles. Improved energy efficiency using hybrid propulsion systems in forest vehicles would result in a significant reduction in greenhouse gas emissions and possibly lower maintenance costs.

Control strategy analysis of the hydraulic hybrid excavator

2015 ◽  
Vol 352 (2) ◽  
pp. 541-561 ◽  
Author(s):  
Wei Shen ◽  
Jihai Jiang ◽  
Xiaoyu Su ◽  
Hamid Reza Karimi
Keyword(s):  
Control Strategy ◽  
Strategy Analysis ◽  
Hydraulic Hybrid ◽  
Hybrid Excavator
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