Steady-state performance investigation of closed-circuit hydrostatic drive using variable displacement pump and variable displacement motor

Singh, Vinay Partap; Pandey, Ajit Kumar; Dasgupta, Kabir

doi:10.1177/0954408920953662

Cited by 6 publications

(2 citation statements)

References 12 publications

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“…Several past studies addressed the modeling and the analysis of the HT with particular focus on the transmission efficiency. One of the most recent works is the analysis performed by Sing et al [8], where the efficiency of a typical closed-circuit HT is evaluated through numerical simulation. This work confirmed the finding, also well discussed by Manring in [9], that the steady-state efficiency of the HT is mostly determined by the overall efficiency of the primary and secondary units.…”

Section: Design Of Reference Ht Systemmentioning

confidence: 99%

Advanced Design and Optimal Sizing of Hydrostatic Transmission Systems

Guo

Vacca

2021

Actuators

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This paper presents a novel method for designing and sizing high-efficient hydrostatic transmissions (HTs) for heavy duty propulsion applications such as agricultural and construction machinery. The proposed method consists in providing cost effective HT architectures that maximizes efficiency at the most frequent operating conditions of the transmission, as opposed to the traditional HT design methods based on the most demanding requirements of the system. The sizing method is based on a genetic optimization algorithm for calculating the optimal displacement of the main units of the HT to maximizes the efficiency in the most frequent operating conditions of the vehicle. A simulation model for HTs is built in MATLAB/Simulink® environment to test three different circuit alternatives for basic HTs. Considering a particular 250 kW heavy-duty application for which drive cycle data were available, this study shows great improvement in energy efficiency (14%) and power saving (20.1%) at frequent operating conditions while still achieving the corner power condition.

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Section: Design Of Reference Ht Systemmentioning

confidence: 99%

Advanced Design and Optimal Sizing of Hydrostatic Transmission Systems

Guo

Vacca

2021

Actuators

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“…et al looked into the stable performance of a closed-circuit hydrostatic actuator using a variable-displacement pump and a variable-displacement motor. They assessed the actuator's overall performance by taking into account the efficiencies of the pump, motor, and drive pump, and derived equations to describe the drive efficiency [24]. Anwar M.N.…”

Section: Introductionmentioning

confidence: 99%

Electro-Hydraulic Servo-Pumped Active Disturbance Rejection Control in Wind Turbines for Enhanced Safety and Accuracy

Zhang,

Yu,

et al. 2024

Processes

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Aiming at the high accuracy and high robustness position control of servo pump control in the pitch system of a wind turbine generator, this paper proposes an active disturbance rejection controller (ADRC). The ADRC considers pitch angular velocity and acceleration limits. According to the kinematics principle of the pump-controlled pitch system, the relationship between the pitch angular velocity and acceleration limit and the displacement of the hydraulic cylinder is established. Through the method of theoretical analysis, the nonlinear relationship expression between pitch angle and hydraulic cylinder displacement is obtained, and the linearization of pitch angular velocity control is realized; the formula for b0 (the estimated value of the input gain of the system) of the pump-controlled pitch system is obtained by the method of modeling and analysis, b0 is the key parameter for the design of the ADRC; the stability of the controller parameters is proved through the stability analysis and simulation analysis, and the design of the self-immobilizing controller with pitch angular velocity and acceleration limitation is the completed ADRC design. Finally, a joint simulation platform of AMESim and MATLAB as well as a physical experiment platform of electro-hydraulic servo pump-controlled pitch control is constructed, and the effectiveness of the proposed control method is verified through simulation and experiment. The results show that compared with the unrestricted ADRC and PID, the velocity-acceleration-limited ADRC can effectively improve the control effect of the angular velocity and acceleration of the paddle, smooth the startup process, improve the safety of the system, and have better position control accuracy and anti-jamming ability.

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