Real-Time Motion Planning of a Hydraulic Excavator using
Jul 06, 2021 · There also exist studies regarding trajectory optimization of a new platform, e.g. a walking excavator [10, 11]. Nevertheless, unlike other studies for conventional hydraulic excavator, they focus on planning and control of locomotion using newly added degrees of freedom (DoF) which is …
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Knowledge-Based Structure Optimization Design for Boom of
Aug 21, 2021 · Li et al. proposed the optimal design of a hydraulic excavator working device, based on the parallel particle swarm optimization (PPSO), through the establishment of the kinematics and dynamics analysis model of hydraulic excavator. The improved parallel PPSO algorithm is used to develop the optimal design for the excavator working device.
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Design optimization of excavator bucket using Finite
Apr 13, 2016 · Simulation and optimization of hydraulic excavator's working device 7). Design, modification and concept generation of fixture to mount sub-assemblies from the hydraulic excavator bucket 8). The improvements of the backhoe-loader arms 9). A hydraulic simulator for an excavator 10). Optimization of component of excavator bucket 9.
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Sliding clamps increase the processivity of synthesis by
In the presence of the β clamp, replication is very efficient (∼750 nucleotides/s) and processive (>50 kb). 9 The clamp loader complex (subunits γ, δ, δ 0, τ, χ, and ψ) of pol III loads
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Opening of the Clamp: Cell
Sep 21, 2001 · The Players. The E. coli clamp is a dimer of the β subunit of the DNA polymerase III ( Figure 1 ). Its clamp loader is the γ complex that consists of five different proteins that form seven subunits, γ 3, δ, δ′, χ, and ψ. The pinnacle of many years of elegant biochemistry, the papers from Jeruzalmi, O'Donnell, Kuriyan (.
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Optimization of manipulator drive mechanisms of hydraulic
hydraulic excavators. To carry out the related analysis, the tribological criterion ensures the optimal synthesis of manipulator drive mechanisms of hydraulic excavators. This criterion determines the mechanical e ciency of drive mechanisms to re ect the tribological loss of the power of the excavator driving mechanism due to the friction between elements
Get a quoteOptimization-Based Fuzzy Energy Management Strategy for
Oct 26, 2020 · Fuel cell hybrid electric construction equipment (FCHECE) is known as a promising solution to achieve the goal of energy saving and environment protection. Energy management strategy is a key technology of FCHECE, which splits the energy flow between power sources. This paper presents a novel optimal energy management strategy for a hybrid electric-powered hydraulic excavator system …
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Development of a Comprehensive Driving Cycle for
Feb 23, 2021 · Aiming at the energy efficiency evaluation of new energy-saving products characterized by energy recovery and power system optimization, taking medium-sized hydraulic excavator as an example, this paper proposes an evaluation method of energy-saving efficiency and a classification construction method of comprehensive driving cycle of hydraulic
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Mechanisms for initiating cellular DNA replication
Feb 24, 2017 · The clamp loaders themselves are AAA+ ATPases that descend from a clade closely related to that of replication initiators and helicase loaders . Clamp loaders operate by forming notched rings that first bind to and stabilize an open-ring state of a sliding clamp and subsequently associate with target DNA (which enters through the notch); the
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Crashworthiness Optimization of Hydraulic Excavator Cab
Apr 06, 2021 · Crashworthiness Optimization of Hydraulic Excavator Cab Roof Rail and Safety Prediction: Finite Element Analysis and Experimental Validation Kefid25 Off-road trucks, tractors and earth-moving machines are at high risk of accidents involving falling objects or rollovers.
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PC35MR-5 small hydraulic excavator | Komatsu
Built with the durability of bigger Komatsu excavators, the PC35MR-5 hydraulic excavator is a powerhouse in a compact package. Learn about the PC35MR-5 small excavator here.
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Development of a Comprehensive Driving Cycle for
Feb 23, 2021 · Aiming at the energy efficiency evaluation of new energy-saving products characterized by energy recovery and power system optimization, taking medium-sized hydraulic excavator as an example, this paper proposes an evaluation method of energy-saving efficiency and a classification construction method of comprehensive driving cycle of hydraulic
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Optimization of energy regeneration of hybrid hydraulic
Mar 01, 2019 · Saving energy is important and necessary for hydraulic excavators. This paper proposed a novel energy regeneration boom system. A variable displacement hydraulic motor and flow control valve were used to regulate the torque and speed of the generator, and to regulate flow through the hydraulic motor. Hence, the optimization of working point
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(PDF) Design optimization of excavator bucket using Finite
Simulation and optimization of hydraulic excavator's working device 7). Design, modiication and concept generation of ixture to mount sub-assemblies from the hydraulic excavator bucket The above image shows the modal analysis 8).
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Digging Trajectory Optimization by Soil Models and
Sep 24, 2013 · Researches for automated construction machinery have been conducted for labor-saving, improved work efficiency and worker's safety, where a tracking control function was proposed as one of the key control system strategies for highly automated …
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Optimal Control for a Parallel Hybrid Hydraulic Excavator
Jun 02, 2013 · Optimal control using particle swarm optimization (PSO) is put forward in a parallel hybrid hydraulic excavator (PHHE). A power-train mathematical model of PHHE is illustrated along with the analysis of components' parameters. Then, the optimal control problem is addressed, and PSO algorithm is introduced to deal with this nonlinear optimal
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Optimization-Based Fuzzy Energy Management Strategy for
Oct 26, 2020 · Fuel cell hybrid electric construction equipment (FCHECE) is known as a promising solution to achieve the goal of energy saving and environment protection. Energy management strategy is a key technology of FCHECE, which splits the energy flow between power sources. This paper presents a novel optimal energy management strategy for a hybrid electric-powered hydraulic excavator system …
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Structure Optimization of Excavator Bucket Mechanism …
other fields. Hydraulic excavator's shovel mechanism is the core part of functional performance. Whether reasonable or not, its structure will directly affect its performance. In recent years, in the optimization design of hydraulic excavator's linkage mechanism, various …
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Multi-objective optimization and simulation of novel
Jan 04, 2021 · Hydraulic excavator is a kind of typical engineering equipment to be widely used in engineering constructions and mining operations (Ge et al. 2019).Due to the high efficiency and large carrying capacity, more users choose face-shovel hydraulic excavator (Zu et al. 2020).In the mining industry, the excavator is required to have strong digging power to load broken rock pieces.
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Optimal Control for a Parallel Hybrid Hydraulic Excavator
Optimal control using particle swarm optimization (PSO) is put forward in a parallel hybrid hydraulic excavator (PHHE). A power-train mathematical model of PHHE is illustrated along with the analysis of components' parameters. Then, the optimal control problem is addressed, and PSO algorithm is introduced to deal with this nonlinear optimal problem which contains lots of inequality/equality
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