Development and key technologies of pure electric construction machinery

Lin, Tianliang; Ye, Lin; Ren, Haoling; Chen, Haibin; Chen, Qihuai; Li, Zhongshen

doi:10.1016/j.rser.2020.110080

Cited by 65 publications

(30 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…where defines the total volume of the hydraulic cylinder, m 3 . Combining Equations (7)-(10), the following equation can be obtained:…”

Section: Model Of the Hydraulic Systemmentioning

confidence: 99%

See 1 more Smart Citation

Integral Sliding Mode Backstepping Control of an Asymmetric Electro-Hydrostatic Actuator Based on Extended State Observer

Zhang

2020

The 1st International Electronic Conference on Actuator Technology: Materials, Devices and Applications

View full text Add to dashboard Cite

“…where defines the total volume of the hydraulic cylinder, m 3 . Combining Equations (7)-(10), the following equation can be obtained:…”

Section: Model Of the Hydraulic Systemmentioning

confidence: 99%

“…Electro-hydrostatic actuators (EHAs) are widely used in aviation, shipbuilding, automobile and other industrial fields due to their small size, light weight, high efficiency and great reliability [1][2][3]. The EHA is a highly integrated direct driven hydraulic system that integrates an electric motor, a pump, an actuator, a tank, etc.…”

Section: Introductionmentioning

confidence: 99%

Integral Sliding Mode Backstepping Control of an Asymmetric Electro-Hydrostatic Actuator Based on Extended State Observer

Zhang

2020

The 1st International Electronic Conference on Actuator Technology: Materials, Devices and Applications

View full text Add to dashboard Cite

“…Recently, much attention has been paid to the automation of the entire shield tunneling machine [3][4][5] as well as the segment assembling [6][7][8]. To the best of our knowledge, all segment erectors are driven by hydraulic systems because of the large power-to-weight ratio [9][10][11][12][13]. In order to achieve automation, closed-loop motion control of the segment erector is one of the fundamental technologies.…”

Section: Introductionmentioning

confidence: 99%

Synchronization Control of a Dual-Cylinder Lifting Gantry of Segment Erector in Shield Tunneling Machine under Unbalance Loads

2021

View full text Add to dashboard Cite

Segment assembling is one of the principle processes during tunnel construction using shield tunneling machines. The segment erector is a robotic manipulator powered by a hydraulic system to assemble prefabricated concrete segments onto the excavated tunnel surface. Nowadays, automation of the segment erector has become one of the definite developing trends to further improve the efficiency and safety during construction; thus, closed-loop motion control is an essential technology. Within the segment erector, the lifting gantry is driven by dual cylinders to lift heavy segments in the radial direction. Different from the dual-cylinder mechanism used in other machines such as forklifts, the lifting gantry usually works at an inclined angle, leading to unbalanced loads on the two sides. Although strong guide rails are applied to ensure synchronization, the gantry still occasionally suffers from chattering, “pull-and-drag”, or even being stuck in practice. Therefore, precise motion tracking control as well as high-level synchronization of the dual cylinders have become essential for the lifting gantry. In this study, a complete dynamics model of the dual-cylinder lifting gantry is constructed, considering the linear motion as well as the additional rotational motion of the crossbeam, which reveals the essence of poor synchronization. Then, a two-level synchronization control scheme is synthesized. The thrust allocation is designed to coordinate the dual cylinders and keep the rotational angle of the crossbeam within a small range. The motion tracking controller is designed based on the adaptive robust control theory to guarantee the linear motion tracking precision. The theoretical performance is analyzed with corresponding proof. Finally, comparative simulations are conducted and the results show that the proposed scheme achieves high-precision motion tracking performance and simultaneous high-level synchronization of dual cylinders under unbalanced loads.

show abstract

“…The pump-controlled system has high energy efficiency and an inherent ability to recover the potential energy and braking energy compared to the valve-controlled system, although its control performance is inferior to the valve-controlled system [1]. With the emergence of the energy crisis and environmental pollution and the rapid development of electric drive technology, the variable speed pump-controlled system has attracted increasing attention [2,3].…”

Section: Introductionmentioning

confidence: 99%

Control and Performance Analysis of Variable Speed Pump-Controlled Asymmetric Cylinder Systems under Four-Quadrant Operation

Zhang

Minav

2020

Actuators

View full text Add to dashboard Cite

Since the energy crisis, the further development of a variable speed pump-controlled hydraulic system driven by an electric machine has attracted increasing attention during the past few years. As a response to this, an innovative double pump-controlled asymmetric cylinder system (DPC) and its control method are proposed in this study. The purpose of this study is to investigate the performance of two variable speed pump-controlled systems for asymmetric cylinders under a four-quadrant operating condition, in comparison with single pump control (SPC). The four-quadrant operating principles of the two systems are analyzed by simulation. Simulation models for both systems are introduced, and a position control method is proposed, with a tracking differentiator and speed feedforward, plus proportional-integral-derivative (PID) for four-quadrant operation. The DPC model was validated with the measurement of a crane. The simulations using the validated model were performed with a position reference and a varying load (four-quadrant operating arm of an excavator). The results demonstrated that the velocity fluctuation is eliminated by using the DPC instead of the SPC, and the position control performance of the DPC is better compared to the SPC, although the energy efficiency decreases slightly. Hence, the proposed DPC and its position control method are feasible for the four-quadrant operation of asymmetric cylinders.

show abstract

Development and key technologies of pure electric construction machinery

Cited by 65 publications

References 47 publications

Integral Sliding Mode Backstepping Control of an Asymmetric Electro-Hydrostatic Actuator Based on Extended State Observer

Integral Sliding Mode Backstepping Control of an Asymmetric Electro-Hydrostatic Actuator Based on Extended State Observer

Synchronization Control of a Dual-Cylinder Lifting Gantry of Segment Erector in Shield Tunneling Machine under Unbalance Loads

Control and Performance Analysis of Variable Speed Pump-Controlled Asymmetric Cylinder Systems under Four-Quadrant Operation

Contact Info

Product

Resources

About