A segmental pump-motor control scheme to attain targeted speed under varying load demand of a hydraulic drive used in heavy earth movers

Ghoshal, Sanjoy K.; Pandey, Ajit Kumar; Dasgupta, Kabir; Bhola, Mohit

doi:10.1016/j.mechatronics.2021.102681

Mechatronics

2021

DOI: 10.1016/j.mechatronics.2021.102681

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A segmental pump-motor control scheme to attain targeted speed under varying load demand of a hydraulic drive used in heavy earth movers

Sanjoy K. Ghoshal

Ajit Kumar Pandey

Kabir Dasgupta

et al.

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2024

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Cited by 5 publications

References 20 publications

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Energy-saving cruise control method for heavy-duty transport vehicle based on pump-valve coordinated drive

Wang,

Zhang,

Liu

2024

Proceedings of the Institution of Mechanical Engineers, Part D:

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In order to realize the dual-goal of the improvement in the cruise performance and fuel economy of the heavy-duty transport vehicle (HDTV) for the transfer of the prefabricated box-girder in the construction of high-speed railway, a pump-valve parallel coordinated drive scheme is designed on the basis of the hydrostatic drive system of the HDTV, which combines the load-sensing valve control system and hydrostatic pump control system. Furthermore, the pump-valve coordinated controller (PVC) is also proposed to ensure the cooperation of the two systems, which adopts power following control strategy to control engine speed, the pump and motor displacement respectively, thus achieving the rough adjustment of the cruise velocity. The linear quadratic regulator (LQR) based on the full-state closed-loop feedback is introduced in PVC to control the proportional direction-valve (EPDV) and compensate for the velocity errors, thus realizing the fine adjustment of cruise velocity. A semi-physical experimental test-platform for the HDTV is established to conduct contrast tests between the rule-based controller (RBC) and the proposed PVC under different operating conditions. The results indicate that the PVC effectively reduces the velocity error, the total error is decreased by 80.6% and that of the maximum error is 43.4% under empty-load conditions, and under heavy load conditions, the total error is lowered by 82.1% and that of the maximum error is 46.8%. Moreover, the PVC also brings down the fuel consumption rate of the HDTV, with a maximum reduction of 27.6% and a minimum of 11.4%.

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Energy-saving cruise control method for heavy-duty transport vehicle based on pump-valve coordinated drive

Wang,

Zhang,

Liu

2024

Proceedings of the Institution of Mechanical Engineers, Part D:

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Research and application of thermal energy recovery and automatic monitoring system for motor equipment

2024

THERM SCI

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In order to achieve an automatic monitoring system for the operation status of motor equipment, the author proposes a research and application based on the thermal energy recovery and automatic monitoring system of motor equipment. The author first analyzes the operating characteristics of the motor and collects four basic parameters of the motor, namely voltage, current, speed, and temperature, in order to determine whether the motor is in normal working condition. Secondly, the system combines electrical parameter detection and acquisition, wireless network technology, industrial field bus technology, and computer user software to achieve remote real-time monitoring, control, and management of the motor?s remote travel status. This enables the entire system to achieve intelligent, networked, and systematic management, solving the technical problem of real-time control and system management that cannot be achieved in motor systems distributed in multiple locations. Finally, the monitoring results indicate that after installation and debugging, the data is displayed on the upper computer. This effect is the data collection of the motor during low speed operation, which is reflected in real-time on the control panel. The actual parameters of the motor were compared with the test parameters of this system, and the test basically achieved the desired effect, with accurate detection data.

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Designing Comprehensive Shifting Control Strategy of Hydro-Mechanical Continuously Variable Transmission

Dong²,

Han

et al. 2022

Applied Sciences

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The shift quality is one of the most important criteria for evaluating the operation and transportation of a hydro-mechanical continuously variable transmission (HMCVT) tractor. In this study, a comprehensive shifting control strategy of a hydro-mechanical continuously variable transmission in a high horsepower tractor is investigated for enhancing shift quality. The detailed mathematical model of the transmission assembly components, such as the pump-motor system, the clutch system and the equivalent gear shaft system of the hydro-mechanical continuously variable transmission, are established to analyze the exact shifting process. For different transmission systems, two different control methods are proposed to achieve precise control of the transmission. The double-loop control (PID-Model Predictive Control) is used for the pump-motor hydraulic system, which not only ensures the anti-interference of the control signal when the displacement is a fixed value but also improves the response characteristics and stability of the control output when the displacement ratio is variable. The PID control is used for oil pressure control of the clutch system, and experimental results reveal that a simple method can obtain better control performance. Finally, a comprehensive control strategy in the process of shifting is proposed, and the optimal control strategy is obtained by comprehensively adjusting the pump-motor hydraulic system and the clutch system at the shifting point. The results show that the shift acceleration under the optimal control strategy is 64.4% lower than that without control. The proposed control strategy can effectively reduce shift shock and Improve shift smoothness.

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A segmental pump-motor control scheme to attain targeted speed under varying load demand of a hydraulic drive used in heavy earth movers

Cited by 5 publications

References 20 publications

Energy-saving cruise control method for heavy-duty transport vehicle based on pump-valve coordinated drive

Energy-saving cruise control method for heavy-duty transport vehicle based on pump-valve coordinated drive

Research and application of thermal energy recovery and automatic monitoring system for motor equipment

Designing Comprehensive Shifting Control Strategy of Hydro-Mechanical Continuously Variable Transmission

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