In this paper, a position control strategy combined with velocity feedforward is proposed for the excavator boom to achieve position and velocity control simultaneously.
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The objective of the swing motion control of an industrial hydraulic excavator is to regulate the supplied flow rate to hydraulic swing motors such that the excavator follows the swing velocity
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Oct 10, 2016 · The experimental results show that the energy consumption of the boom system falls by 15% compared to the load-sensing system; the pressure pulsations of the pump when the boom starts to move reduce from 6.9 MPa to 1.7 MPa. Therefore, the independent metering circuit and the control strategy are good configuration for the boom actuator.
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Boom configuration was recorded by aerial and surface video and still photography. Relative boom/surface water velocity was measured by timing the drift of wood chips over a known distance along the side of the boom tow vessels. This data was converted to a relative velocity at the boom pocket by
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Oct 01, 2018 · The complexity of the issue is the combination of energy consumption characteristics and operation accuracy. Therefore, based on the IMV system and the pump-valve hybrid control principle, a velocity and position combined control strategy is proposed for hydraulic excavator boom cylinder and arm cylinder.
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Appendix B: SPS Position, Velocity, and Time (PVT) Performance Expectations Appendix C: Key Terms, Definitions, Abbreviations and Acronyms Note: A Table of Contents is contained within each respective Appendix.
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Teacher Support [BL] For sound, a higher frequency corresponds to a higher pitch while a lower frequency corresponds to a lower pitch. Amplitude corresponds to the loudness of the sound. [BL] [OL] Since sound at all frequencies has the same speed in air, a change in frequency means a change in wavelength. [Figure Support] The same speaker is capable of reproducing both high- …
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Research on Trajectory Planning and Autodig of Hydraulic Excavator
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We developed a system to evaluate the skill of operating a hydraulic excavator. The system employs a remotely controlled (RC) excavator and virtual reality (VR) technology. We remodeled the RC excavator so that it can be operated in the same manner as a real excavator and proceeded to measure the excavator's state. To evaluate the skill of operating this system, we …
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Figure 13: Position of the sections for the boom Figure 14: Position of the sections for the stick Table 2 shows the values of the stresses and of the geometrical characteristics present in the arms considering the load condition related to the lifting at the minimum distance Figure 4.
Get a QuoteMay 30, 2019 · Excavators are widely used in construction, mining, and other projects. However, there are certain environments, such as chemical substance leakage and conflagration sites, which are not suitable for on-site operation. In such situations, the necessity for automatic control and position control is considerably high and it is the development trend of the excavators. In …
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The boom height potentiometer (Y L) in Figure 7 was monitored on the . left boom to detect boom position relative to the ground reference. A potentiom eter stand for low boom angles and a stand extension were used for larger boom . angles to support the potentiometer (Y L). A scale factor of 1. 724 in. /V was . used for this output.
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characteristics are very significant part in excavator parts like boom, arm and bucket limit the life expectancy of the excavator. Therefore, excavator parts must be strong motion (velocity and acceleration) of links. Inertial, Coriolis, and frictional forces are
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Lower Boom Mechanism (LBM) - This device serves two primary functions: (1) it measures tether length and velocity as the tether runs through the mechanism, and (2) it reads the tether tension at the reel. It also provides change of direction for the tether from the reel to …
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A recent trend in the development of off-highway construction equipment, such as excavators, is to use a system model for model-based system design in a virtual environment. Also, control system design for advanced excavation systems, such as automatic excavators and hybrid excavators, requires system models in order to design and simulate the control systems.
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initial position. We know that at t = 0, the velocity components are vx = 0 and vy = 50 m s and the coordinates are x = 0 and y = 0. From the acceleration a we do know something about the velocity. Since the acceleration is the time derivative of …
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The control characteristics of the hydraulic control system 10 under the mode corresponding to velocity modulation control are depicted in FIGS. 2A, 2B, and 2C. With reference to FIG. 2A, the systems's flow characteristics are illustrated by a velocity modulation control pressure curve 102.
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Jul 01, 2021 · A 3D model of the robotic excavator is shown in Fig. 1, this device is used to carry out the experiments and evaluate the controller performances.To realize automatic operation, the original hydraulic pilot systems have been transformed to electro-hydraulic position servo systems, the original pilot pressure valves are transformed into electro-hydraulic proportional …
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The mathematical model of excavator working equipment is established and the position, velocity and acceleration of key hinged point are calculated by analysis method. The virtual prototype model of excavator working equipment is established and analyzed its kinematics and dynamics character in the ADAMS environment.
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Figure 13: Position of the sections for the boom Figure 14: Position of the sections for the stick Table 2 shows the values of the stresses and of the geometrical characteristics present in the arms considering the load condition related to the lifting at the minimum distance Figure 4.
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