Simulation and experimental study on the pump efficiency improvement of continuously variable transmission

Qu, Daohai; Luo, Wei; Liu, Yunfeng; Fu, Bi; Zhou, Yue; Zhang, Feitie

doi:10.1016/j.mechmachtheory.2018.09.014

Cited by 20 publications

(14 citation statements)

References 18 publications

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“…As for the transmission network, variable speed pump is widely applied due to its ability of regulating flow flexibly, but the corresponding energy consumptions cannot be ignored. Consequently, research [7] proposes a holistic design method for optimal hydraulic design of the variable speed pumps and research [8] presents a new hydraulic scheme to improve the transmission efficiency. In terms of the heat demand side of the DH system, the properties of thermal load will significantly influence the operation optimization of the whole system.…”

Section: Introductionmentioning

confidence: 99%

A Data-Driven Method for Fault Detection and Isolation of the Integrated Energy-Based District Heating System

Deng

Xiahou

et al. 2020

IEEE Access

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Effective fault detection and isolation can improve the safety, reliability and efficiency of the district heating system. In order to detect and locate the sensor, actuator and component faults in the district heating system with faster response speed and higher accuracy, a two-level fault detection and isolation scheme, consisting of upper-level classifier for system faults and lower-level classifier for subfaults, is developed based on convolutional neural networks. In consideration of the difficulty of obtaining the operation data of a real district heating system under various faulty states, a test benchmark model of an integrated energy based district heating system is built from the system level, which contains the renewable energy based water boilers, transmission networks, and heat load substations to examine the effectiveness of the proposed scheme. To improve the model reality, the dynamics of sensors and actuators, models of heat exchangers, and thermal inertia are considered in the district heating system, and Gaussian noises are added in the raw data signals. Nine kinds of system faults including sensor, actuator, component faults, along with three sub-fault types of bias, drift, complete failure, are investigated in the benchmark system. The performance of the proposed two-level fault detection and isolation scheme is evaluated under different data windows and Gaussian noises in the district heating system, and is compared with other data-driven methods including k-nearest neighbor, random forest and back propagation neural networks. Experimental results show that the two-level fault detection and isolation scheme can detect the faults in the district heating system accurately and robustly, and the proposed scheme has the potential to become an effective solution to real-time monitoring of faults in the district heating system. INDEX TERMS District heating system, fault detection and isolation, thermal inertia, data-driven, convolutional neural networks.

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Section: Introductionmentioning

confidence: 99%

A Data-Driven Method for Fault Detection and Isolation of the Integrated Energy-Based District Heating System

Deng

Xiahou

et al. 2020

IEEE Access

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“…In the paper, the researched HST uses a swash-plate axial plunger pump. The mechanism adjusts the angle of swash plate of plunger pump through the variable control mechanism to change the displacement of the pump [26,27]. The motor is a constant plunger motor.…”

Section: Working Principle Of Hst Usedmentioning

confidence: 99%

Research on Load Disturbance Based Variable Speed PID Control and a Novel Denoising Method Based Effect Evaluation of HST for Agricultural Machinery

Cheng

2021

Agriculture

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This paper aims to realize and improve the constant speed control performance of tractors with HST (Hydrostatic Transmission) variable speed units. To achieve this, based on the HST test bench of the tractor, we perform a verification test of the adjustable speed characteristics, a denoising filter test of the response signal, a test on the influence of the load disturbance on the adjustable speed characteristics and a PID-based constant speed performance detection test. The results of the verification test of the adjustable speed characteristics show that the theoretical value and actual value of the adjustable speed transmission characteristics of the HST used are essentially consistent with each other. The results of the test of the load disturbance’s influence on the adjustable speed characteristics show that the increase in load torque inhibits the HST output response. Therefore, the paper proposes and designs a PID-based closed-loop constant speed control system. The paper uses a step response test and a load disturbance test to research the control result of the constant speed system. Collecting and analyzing all test results, we find that the constant speed control based on PID has a very good result. The average error between the average HST output speed and the target speed set was 0.37%, and the average standard deviation of output speed was 1.18 rpm. In addition, the paper proposes a denoising method combing the empirical mode decomposition method and the Gaussian distribution determination. The method shows that the first two orders of the components of the HST response signal should be removed as noise. The paper uses the denoised signal and the partial least squares method to analyze the influencing factors of the constant speed control result. The analysis results show that the rate of change of load torque has the biggest influence on the stability of HST output speed, followed by the target value.

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“…According to the coordinate transformation, the inner rotor tooth profile curve equation can be expressed as [27]:…”

Section: Design Of Gerotor Pump Oil Supply System For Hybrid Transmissionmentioning

confidence: 99%

Design of Gerotor Pump and Influence on Oil Supply System for Hybrid Transmission

et al. 2021

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Electric continuously variable transmission (E-CVT) is a vital part of the automobile in order to enhance the power coupling. The oil pump is an important power source component in the hybrid transmission system. Its efficiency exerts a significant impact on the efficiency of the oil supply system and even the hybrid transmission system. In this study, a gerotor pump is designed in line with the requirements of a certain type of hybrid electric vehicle. A Non-dominated Sorting Genetic Algorithm II (NSGA-II) genetic algorithm was employed to optimize the rotor tooth profile. The proportional-derivative (PD) control of the oil supply system was realized to lower the functional error of the oil supply system based on the AMESim simulation platform. In addition, the prototype test was performed to verify the rationality of the design.

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Simulation and experimental study on the pump efficiency improvement of continuously variable transmission

Cited by 20 publications

References 18 publications

A Data-Driven Method for Fault Detection and Isolation of the Integrated Energy-Based District Heating System

A Data-Driven Method for Fault Detection and Isolation of the Integrated Energy-Based District Heating System

Research on Load Disturbance Based Variable Speed PID Control and a Novel Denoising Method Based Effect Evaluation of HST for Agricultural Machinery

Design of Gerotor Pump and Influence on Oil Supply System for Hybrid Transmission

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