Intelligent Energy-saving Method Research Of Excavator Based On Identifying The Sequence Of Actions

As a high-power construction machinery, hydraulic excavator complete theexpected complex work and energy efficiency has been the goal. With the world’spromoting environmental awareness, hydraulic excavator power controlenergy-saving technology research and development has become increasingly urgent.As for excavators energy losses in power matching, this paper is based on theindustry-academy cooperation project “Development and Industrialization on TwoDSP and Two-time Scale Energy-saving Controller of the Excavator” in Fujianprovince, studying the identification of hydraulic excavators intelligent actionsequence.This paper summarizes international status quo of energy-saving control ofhydraulic excavators, and analyzes the operating characteristics of hydraulicexcavators and the principle of the pump and engine power saving technology tomatch in the work process. In order to preferably analyze the state of implementationof the excavator at each work action. This research use AMEsim and ADAMSsimulation platform to establish a joint model of the hydraulic system andthree-dimensional physical model of hydraulic excavator.In order to achieve the identification of excavator action sequences and workingconditions, this study determines the action performed by detecting each valve pilotpressure signal, and identifies a standard digging condition action sequences usingfuzzy matching method to retrieve the action sequences code sample in pre-workingprocess, and finally identifies excavator working condition.The swash plate angle of the pump is controlled to achieve to meet the driver’soperating practices by using fuzzy control strategy. Pilot pressure and pump pressureare acted as inputs of fuzzy control. The study designs fuzzy control rules to controlpump displacement to meet expectations of the speed of each actions.the paper mainly simulates two basic working conditions of excavator (diggingcondition and formation conditions) and observes parameters of different actions. Excavator pre-working torque is calculated. Based on the theory of engine savingoperating curve, the basic setting of engine throttle adjustment amount is determined.As for the actions of large power requirements, the adjustment value of the throttle isdesigned to achieve excavator saving purpose.This study carried out the above control strategy in AMEsim and ADAMSco-simulation, and engine speed curves were compared to verify the correctness ofenergy-saving methods.