Stability control for a huge excavator for surface excavation

Abstract

a b s t r a c tIn this study, we present an algorithm for the dynamic modeling of an excavator equipped with bucket wheels, which is used for surface mining activities. To develop a dynamic model of the excavator while working, we used data from the design theme, which described the mass distribution and elasticity of the technological system. During technological tests, the signals for vibrations and mechanical stresses were recorded in critical areas of the excavator structure. These records contained some modal information, which was also used to develop a simplified dynamic model. We also measured the elasticity of the thrust ball bearing, which is an oscillatory bearing and one of the most heavily loaded components in the excavator's structure. Finally, using the dynamic model, we calculated the natural frequencies for the principal subassemblies of excavator, where the modal frequencies obtained by the sensors while the excavator was running confirmed the good approximation of the model.

Developments in energy regeneration technologies for hydraulic excavators: A review

“…This has been successfully applied and commercialized in small construction vehicles. However, with large machines working in harsh environments especially big HEs, the current electrical technology has not met the requirements such as durability, large power supply and sudden changes [22][23][24].…”

Analysis of the Dynamic Response as a Basis for the Efficient Protection of Large Structure Health Using Controllable Frequency-Controlled Drives

“…The dynamic response of the bucket-wheel boom substructure at the BWE ERc 1400, presented in the papers authored by the researchers from the University of Petros , ani [32][33][34][35] -due to inconsistencies in the finite element model and the model of loads caused by the forces resisting excavation-in accordance with the results of the research outlined in [3], as well as the studies published in [36][37][38][39], does not represent an accurate basis for assessing its lifespan, as presented in [35,40]. The dynamic model of the BWE slewing superstructure in the vertical plane developed by Cioara et al [41], where the main subassemblies of the load-carrying structure (bucket-wheel boom, counterweight boom and mast) were treated as rigid bodies, was used for the analysis of the BWE stability [42].…”

The influence of incrustation and chute blockage on the dynamic behaviour of a bucket wheel excavator slewing superstructure

“…Bucket wheel excavators (BWEs) are high capacity machines operating in extremely harsh working conditions under the influence of loads of a pronounced dynamic nature. Experimentally and analytically obtained results of analysis of the dynamic behaviour serve as a foundation of modern methods for calculating structural stability (Cireş and Nani, 2016), as well as fatigue (Pietrusiak et al, 2017;Rusiński et al, 2017) and reliability (Karray et al, 2017;Ognjanović and Benur, 2011;Ognjanović et al, 2014) of bearing substructures and power transmission systems of BWEs. The approach to analysis of the dynamic behaviour of BWEs should be of a holistic nature, since analysis of individual subassemblies with disregard of their interaction with the rest of the dynamic system could lead to results which may not correspond to the actual behaviour of the construction (Schlecht, 2014).…”

“…3, was conducted using the procedure presented in(Arsić et al, 2011;Bošnjak et al, 2009). The forced response of the model was determined by applying Lagrange's second order equations, which are commonly used to analyse the behaviour of complex dynamic systems(Brusa et al, 2014;Cireş and Nani, 2016;Volkov and Cherkasov, 1969), on the assumption that the structural damping may be neglected in the out-of-resonance region,(Bošnjak et al, 2015).According to previous investigations(Bošnjak and Zrnić, 2012;Bošnjak et al, 2015; Gnjatović, 2016), published experimental data(Brkić et al, 2014;Gottvald, 2010;Pietrusiak, 2017;Rusiński et al, 2015) as well as Standards(AS4324.1, 1995; DIN 22261-2, 2016)…”