Investigation of the Energy Regeneration and Control Strategy of a Crane Hoisting System

Abstract

In recent years, fuel costs have risen dramatically due to the acceleration of energy consumption. Due to global warming, countries have enforced new requirements for energy-saving and emissionreduction in large construction machinery [1]. In the operation of construction machinery, it is possible to reuse and recycle energy because of the cyclic change of workload [2].The energy recovery system can be divided into hydraulic and electrical parts. Minav et al. proposed using a forklift as an experimental platform for comparing hydraulic with electrical recovery schemes in terms of fuel consumption and service performance [3] and [4]. It can be seen from the results that the hydraulic type is the better choice rather than the electric one in terms of fuel-saving rate. However, the hydraulic effects are rather limited in the load range, for which the overall energy-saving effects of electrical types can be better. Lin et al. employed hydraulic and electrical methods to recover the excavator boom potential energy [5]. The results have demonstrated that the hydraulic speed is the better choice compared to the electric one in controlling the speed of moving arms. Gong et al. showed that the potential energy of forklift is stored in the supercapacitor by the motor, where the experimental evaluation is also carried out. Specifically, comprehensive energy-saving effects of 20.8 % can be reached [6] and [7]. Yu and Kwan conducted simulations to analyse the boom potential of the excavator by hydraulic transmissions. Compared to the traditional accumulator recovery, it has not yet been experimentally verified [8]. Lin et al. considered the dynamic stability of hydraulic recycling and the economic nature of the electrical system [9]. Combining the advantages of hydraulic and electric recovery, the utility model can be applied to the recovery of the potential energy of the movable arm of the excavator. These results have demonstrated that the new system can increase the fuel-saving rate and reduce the installed capacity of the generator by 65 % compared to the traditional hydraulic recycling method.From the system structure perspective, the system can be categorized into series, parallel, and hybrid systems. Kwon et al. have investigated the series, parallel, and hybrid connection systems of excavator • According to the potential energy recovery rate, determine the energy recovery system operating conditions. Investigation of the Energy Regeneration and Control Strategy of a Crane Hoisting System• Describes the control strategy of the entire energy recovery system.

Green Tribology for the Sustainable Engineering of the Future

“…From an engineer's perspective, as someone who tends to employ or design a green tribological system, the term green tribology has tended to be used in the context of three principal thematics: biodegradable lubricants, biomimetic surfaces and green technologies such as wind turbines or tidal electric generators, etc. [18] and [19]. However, in this way green tribology is frequently thought of in terms of isolated, or even hypothetical, solutions without a clear and feasible industrial scope, thus lacking a wideranging applicability.…”

Research on the Hoisting Motor Drive System’s Active Disturbance Rejection Control and Energy Consumption for a Crane

“…As a main factor of improvement in the energetic efficiency of the crane, particular attention should be paid on the hoisting motor drive system [9]. For the crane hoisting motor drive system, Chen, et al [10] proposed an energy loss system, derived the calculation formula of the energy recovery late, and developed the control strategy of the energy-saving system. But Chen's research was based on the mechanical connection with the winch-motorsynchronous motor.…”