Quantitative measures for assessment of the hydraulic excavator digging efficiency

作     者：Dragoslav JANOSEVIC Rosen MITREV Boban ANDJELKOVIC Plamen PETROV 

作者机构：Faculty of Mechanical EngineeringUniversity of Nis Faculty of Mechanical EngineeringTechnical University of Sofia 

出 版 物：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 (浙江大学学报（英文版）A辑（应用物理与工程）)

年 卷 期：2012年第13卷第12期

页      面：926-942页

核心收录：

学科分类：08[工学] 0802[工学-机械工程] 

基　　金：Project (No 035049) partly supported by the Ministry of Education and Science of the Republic of Serbia 

主　　题：Hydraulic excavators Digging efficiency Quantitative measures 

摘      要：In this paper,quantitative measures for the assessment of the hydraulic excavator digging efficiency are proposed and *** following factors are considered:(a) boundary digging forces allowed for by the stability of an excavator,(b) boundary digging forces enabled by the driving mechanisms of the excavator,(c) factors taking into consideration the digging position in the working range of an excavator,and(d) sign and direction of potential digging resistive force.A corrected digging force is defined and a mathematical model of kinematic chain and drive mechanisms of a five-member excavator configuration was developed comprising:an undercarriage,a rotational platform and an attachment with boom,stick,and *** the basis of the mathematical model of the excavator,software was developed for computation and detailed analysis of the digging forces in the entire workspace of the *** using the developed software,the analysis of boundary digging forces is conducted and the corrected digging force is determined for two models of hydraulic excavators of the same mass(around 17 000 kg) with identical kinematic chain parameters but with different parameters of manipulator driving *** results of the analysis show that the proposed set of quantitative measures can be used for assessment of the digging efficiency of existing excavator models and to serve as an optimization criterion in the synthesis of manipulator driving mechanisms of new excavator models.