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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2008, Vol. 9 Issue (5): 624-632    DOI: 10.1631/jzus.A071552
Civil & Mechanical Engineering     
Dynamic simulation and optimal control strategy for a parallel hybrid hydraulic excavator
Xiao LIN, Shuang-xia PAN, Dong-yun WANG
State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China
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Abstract  The primary focus of this study is to investigate the control strategies of a hybrid system used in hydraulic excavators. First, the structure and evaluation target of hybrid hydraulic excavators are analyzed. Then the dynamic system model including batteries, motor and engine is built as the simulation environment to obtain control results. A so-called multi-work-point dynamic control strategy, which has both closed-loop speed PI (proportion integral) control and direct torque control, is proposed and studied in the simulation model. Simulation results indicate that the hybrid system with this strategy can meet the power demand and achieve better system stability and higher fuel efficiency.

Key words： Hybrid system      Hydraulic excavator      Multi-work-point dynamic control      Direct torque control     
Received: 16 October 2007      Published: 15 April 2008
CLC:  TH137  
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Xiao LIN
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Cite this article:

Xiao LIN, Shuang-xia PAN, Dong-yun WANG. Dynamic simulation and optimal control strategy for a parallel hybrid hydraulic excavator. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2008, 9(5): 624-632.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.A071552     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2008/V9/I5/624

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