Reliability Demonstration of a Robot System for an Unmanned Controlling Excavator

Back, Seung Jun; Son, Young Kap; Kim, Jun Hee; Lee, Mi Kyung

doi:10.4028/www.scientific.net/amm.563.215

Cited by 3 publications

(3 citation statements)

References 3 publications

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“…Weibull distribution [32][33][34] and modifications of the Weibull distribution [35,36] for reliability analysis were discussed by several authors. Many researchers have suggested the lifetime distribution of the hydraulic excavator follows the Weibull distribution [37][38][39][40]; they stated above use Weibull distribution as theoretical reliability model, according to the experimental data, analyzed the reliability of the subsystems for the excavator. So the reliability goal of the new systems in this study is gained based on Weibull analysis.…”

Section: Proposed Comprehensive Methods For Reliability Allocationmentioning

confidence: 99%

A Comprehensive Method of Apportioning Reliability Goals for New Product of Hydraulic Excavator

Liu

Zeng

Wan

et al. 2019

Mathematical Problems in Engineering

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It is important to allocate a reliability goal for the hydraulic excavator in the early design stage of the new system. There are some effective methods for setting reliability target and allocating its constituent subsystems in the field of aerospace, electric, vehicles, railways, or chemical system, but until now there is no effective method for the hydraulic excavator or engineering machinery. In this paper, an approach is proposed which combines with the conventional reliability allocation methods for setting reliability goals and allocating the subsystem and parts useful in the early design stage of the hydraulic excavator newly developed. It includes Weibull analysis method, modified Aeronautical Radio Inc. (ARINC) method, and modified systematic failure mode and effect analysis (FMEA) method. After completing reliability allocation, it is necessary to organize the designers and experts to evaluate the rationality of the reliability target through FEMA analysis considering feasibility of the improvement technically for the part which was new developed or had fault in its predecessor. The proposed approach provides an easy methodology for allocate a practical reliability goal for the hydraulic excavator capturing the real life behavior of the product. It proposes a simple and unique way to capture the improvement of the subsystems or components of the hydraulic excavator. The proposed approach could be extended to consider other construction machinery equipment and have practicality value to research excellent mechanical product.

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Section: Proposed Comprehensive Methods For Reliability Allocationmentioning

confidence: 99%

A Comprehensive Method of Apportioning Reliability Goals for New Product of Hydraulic Excavator

Liu

Zeng

Wan

et al. 2019

Mathematical Problems in Engineering

View full text Add to dashboard Cite

show abstract

“…In Beck et al, 7 the reliability of an unmanned controlling excavator robot system was verified. Mohammed and Athraa 8 examined nonlinear modelling of a fuzzy control design for a 4-DOF (degree of freedom) robotic backhoe excavator.…”

Section: Introductionmentioning

confidence: 99%

Development and experimental investigation of an automatic control system for an excavator

Liu

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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Excavators are widely used at various construction sites, and they can significantly reduce difficulties during construction and improve construction efficiency. However, conventional excavators still exhibit many shortcomings. In certain construction environments that require precision, the construction accuracy cannot be guaranteed because excavators usually operate in harsh environments. Hence, they can cause potential life hazards to the drivers in certain situations. To address these issues, an excavator automatic control system is developed via retrofitting, modelling, and designing a control program for an excavator. This system can realise three working modes: manual operation, remote control operation, and automatic operation. A test prototype based on the aforementioned concept is developed and relevant experiments are performed. The results under automatic operation mode show that the automatic control system can move the excavator smoothly along the expected trajectory. The fluctuation in the operation velocity is low, and the positioning error to the target position is within 7 cm. Thus, the system can realise the desired control accuracy and satisfy other task design requirements.

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“…Gu et al 8 investigated various control systems for a robotic excavator, whose results demonstrated that state dependent parameter þproportional integral plus (SDP-PIP) controller can provide improved performance. However, current research mainly focus on the common excavator, [9][10][11][12] there are few reports about the research on the telescopic excavator, which has the greater flexible operation mode and the bigger operation range. So the research on spatial kinematics [13][14][15] of telescopic robotic excavator has significant value based on virtual prototype [16][17][18][19] and experiment research.…”

Section: Introductionmentioning

confidence: 99%

Virtual prototype and experimental research on spatial kinematics of telescopic robotic excavator

Cui

Feng

et al. 2017

International Journal of Advanced Robotic Systems

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In order to achieve autonomous operation, the kinematics model and experiment system of telescopic excavator are studied. Firstly, the operation space of the robotic excavator is classified and mapping models between different spaces are established based on the D-H method and geometrical relationship method. Then, the virtual prototype of the telescopic robotic excavator is built based on the SimMechanics software, leveling operation and digging operation are simulated; kinematics model and virtual prototype are tested and verified. Finally, experimental system is developed and trajectory tracking experiment is carried out. By comparing with the simulation results, the validity of the proposed control scheme is verified. The research of this article laid foundations for further study and application.

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Reliability Demonstration of a Robot System for an Unmanned Controlling Excavator

Cited by 3 publications

References 3 publications

A Comprehensive Method of Apportioning Reliability Goals for New Product of Hydraulic Excavator

A Comprehensive Method of Apportioning Reliability Goals for New Product of Hydraulic Excavator

Development and experimental investigation of an automatic control system for an excavator

Virtual prototype and experimental research on spatial kinematics of telescopic robotic excavator

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