Analytical, Experimental, and Numerical Investigation of Energy in Hydraulic Cylinder Dynamics of Agriculture Scale Excavators

Abstract

This paper discusses energy behaviors in hydraulic cylinder dynamics, which are important for model-based control of agriculture scale excavators. First, we review hydraulic cylinder dynamics and update our physical parameter identification method to agriculture scale experimental excavators in order to construct a nominal numerical simulator. Second, we analyze the energy behaviors from the port-Hamiltonian point of view which provides many links to model-based control at laboratory scale at least. At agriculture scale, even though the nominal numerical simulator is much simpler than an experimental excavator, the analytical, experimental, and numerical energy behaviors are very close to each other. This implies that the port-Hamiltonian point of view will be applicable in agriculture scale against modeling errors.

Simulation Study on Energy Recovery and Regeneration of Hybrid Loader Arm

“…In Figure 8, the system enters the hybrid mode in automatic mode. The fuel consumption of the conventional system engine is 165.9 g. The fuel consumption of the hybrid power system engine is 92.2 g. The energy-saving efficiency of the system is 44.4 % from equation (14). In summary, the system can effectively reduce engine fuel consumption.…”

“…For the study of energy recovery and regeneration of hydraulic systems, scholars have conducted a lot of research [9][10][11][12][13][14]. Qihuai Chen proposed a novel potential energy regeneration system (PERS) for a hybrid hydraulic excavator (HHE) implemented using a hydraulic accumulator and a valvemotor generator.…”