Precise Position Adjustment of Automotive Electrohydraulic Coupling System With Parameter Perturbations

Mei, Mingming; Cheng, Shuo; Li, Liang; Yan, Bingjie

doi:10.1115/1.4053430

Cited by 3 publications

(5 citation statements)

References 24 publications

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“…force on the pedals: 0...500 N; force on the pusher: 0...2500N; force on the rod: 0...10000 N; movement of the rod and pusher: 0...50 mm; rarefaction in the working cavities of the amplifier: 0...0.09 MPa; pressure in the hydraulic drive of the brakes: 0...15 MPa. Analysis of the products of the world's leading manufacturers of measuring equipment [9,20,22,23,[30][31][32] was carried out taking into account the ratio of functional propertiesprice. As a result of this analysis, the following measuring devices were identified:…”

Section: Automated System For Measuring and Recording Complex Of Work...mentioning

confidence: 99%

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Research of the vacuum brake booster working process

Sklyarov,

Shapovalov,

Chernenko

et al. 2024

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The creation of a laboratory installation was carried out with an aim to ensure the study of the working processes and characteristics of vacuum boosters as a part of hydraulic brake drives for vehicles with a gross weight of up to 3.5 tons for civilian usage, and armored vehicles with a gross weight of up to 8.5 tons designated for service and combat missions. Theoretical researches in this direction have been previously carried out by a number of scientists of the Department of “Automobiles” named after prof. Gredeskul A.B. in Kharkiv National Automobile and Road University, the results of which have been highlighted in a number of scientific papers. Comparison of the results of theoretical studies with the experimental ones, received on the laboratory setup and suggested in this paper, according to the experimental method described in the article, using the created electronic signal processing complex and sensor unit, made it possible to establish a discrepancy between theoretical and experimental studies within 6%. This complex for experimental research was created for the first time, thus allowing to obtain the results that confirm the theoretical studies of the vacuum boosters of the brake drive of cars, as well as revealed a number of dependencies between the weight and overall parameters of the under research unit, along with the number of functional relationships between the structural components of the vacuum boosters, which enables to significantly optimize its design.

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Section: Automated System For Measuring and Recording Complex Of Work...mentioning

confidence: 99%

“…One of these areas is the development of methods for the development of efficient vacuum brake boosters, which are produced in Ukraine. Currently, this is hampered by insufficient knowledge about their operational processes, as well as the lack of scientifically based generalized criteria for evaluating effectiveness [19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Research of the vacuum brake booster working process

Sklyarov,

Shapovalov,

Chernenko

et al. 2024

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“…replacing the nonlinear features with uncertainty [3]. In this paper, a data-driven approach is proposed that can fit nonlinear features well.…”

Section: Ima-2023mentioning

confidence: 99%

“…The electric brake booster (E-Booster) is a key hydraulic actuator component for electric vehicle braking. Unlike steering assistance systems (EPS), the E-Booster no longer requires speed or torque regulation of the motor but transforms the braking assistance into a position control problem [1,2,3]. The principle is to utilize the compression state of the reaction disk to transform the power-assisted process into a closed-loop control of the motor mechanical angle.…”

Section: Introductionmentioning

confidence: 99%

A data-driven approach to fault modeling and diagnosis of brake-by-wire system

Mei

2023

J. Phys.: Conf. Ser.

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E-Booster plays an important role in braking safety as the pressure source for vehicle hydraulic systems. According to the design feature of its series controller, the signals on key nodes, which can be directly measured, can be used as the data source for fault diagnosis. In this paper, a deep learning technique of residual 1-D CNN equipped with parallel structure is proposed for fault recognition and classification in a dynamic process. With the help of wavelet transform and probabilistic heat map, it is found that the phase current fault feature is distinct in the frequency domain. In contrast, the uniform demagnetization fault and pressure recession fault are more obvious in the time domain. Therefore, the parallel network structure with a wide and narrow convolutional kernel is used, which can handle multiple complex fault features simultaneously. Simulation models based on both data-driven and mathematical formulations are also established to better fit the actual nonlinear conditions. Finally, the proposed network structure can reach 92.1% classification accuracy compared with the commonly used lightweight 2-D CNN model. It can be concluded that 1-D CNN achieves similar classification results as 2-D CNN with less computational resource consumption.

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“…In reference [3], Todeschini utilizes the Nyquist criterion on the circular plot to demonstrate the stability of nonlinear pressure feedback control systems. Meanwhile, Mei adopts a direct approach of robust guaranteed cost control to implement displacement feedback, which relies on the construction of LMI using Lyapunov stability for control law design [4]. The hydraulic characteristic curve is a critical parameter in steady-state or feedforward control for E-Booster stability control, and it is typically approximated using polynomial fitting or first-order transfer functions [2,3,5].…”

Section: Introductionmentioning

confidence: 99%

Feature extraction and recognition: key to solving stability issues in electric braking booster

Mei,

Cheng,

et al. 2023

Fourth International Conference on Artificial Intelligence and Electromechanical Automation (AIEA 2023)

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As the E-Booster is widely used, its stability and safety are receiving more and more attention. However, the nonlinear characteristics causes interference in describing the system characteristics. In this paper, a nonlinear least squares (NLS) method is proposed to extract the hydraulic characteristics, and then the control is corrected by predicting idle stroke to improve the performance. First, the reasons that lead to the deterioration of the braking performance after the vehicle passes over a washboard surface are analyzed. The open-loop system gain is changed due to the increase in clearance, and it is demonstrated that the system performance becomes worse or even unstable with the help of Nyquist plots and describing functions. A piecewise linear function with three parameters is then proposed to characterize the dynamic system. From a complete period of increase and decrease in pressure, the parameter values can be obtained by NLS. Taking the three parameters as input, the support vector machine (SVM) and neural network (NN) methods are used to predict the current idle stroke. Finally, the simulation results show that NN has higher classification accuracy and better generalization capability. The nonlinear compensation to the controller can significantly improve the performance of the system.

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Precise Position Adjustment of Automotive Electrohydraulic Coupling System With Parameter Perturbations

Cited by 3 publications

References 24 publications

Research of the vacuum brake booster working process

Research of the vacuum brake booster working process

A data-driven approach to fault modeling and diagnosis of brake-by-wire system

Feature extraction and recognition: key to solving stability issues in electric braking booster

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