Flow-valve modelling and wheel-slip control for an automotive hydraulic anti-lock braking system

Liu, Z.-y.; Jing, Houhua; Chen, Hong

doi:10.1177/0954407011411390

Cited by 7 publications

(7 citation statements)

References 24 publications

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“…Mannesmann Rexroth, 2014). This subject was reflected in a number of modern inventions and research works (Rybak, 2008;Zhang, et al, 2010;Liu, et al, 2011).…”

Section: Discussionmentioning

confidence: 99%

Providing Cavitation-Free Operation of Hydraulic Systems under Passing Load in Hydraulic Actuator

Musina¹,

Tselischev²,

Tselischev³

et al. 2015

MAS

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The problems of braking and positioning of hydraulic actuators are an integral part of output speed control in hydro-pneumatic actuators. This article is focused on a hydraulic braking of driven elements of machines and mechanisms which is carried out by devices known as brake valves (counterbalance, load control, over-centre valves). Brake valves are used to exclude overrunning speed under passing loads when the external load direction coincides with the direction of movement (rotation) of the hydraulic actuator. They provide a constant pressure in pressure line and prevent cavitation. In this article the design and operation of brake valves are analyzed. The need for brake valves in hydraulic machines with hydraulic actuators under a passing load is proved. As a result of theoretical research a mathematical model of dynamics of hydraulic actuator with a brake valve has been developed. This model unlike others takes into account the design of main and control spools of the brake valve. The problem of logging-running unit braking is solved by the use of the hydraulic brake valve as a part of hydraulic logging system.

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“…Mannesmann Rexroth, 2014). This subject was reflected in a number of modern inventions and research works (Rybak, 2008;Zhang, et al, 2010;Liu, et al, 2011).…”

Section: Discussionmentioning

confidence: 99%

Providing Cavitation-Free Operation of Hydraulic Systems under Passing Load in Hydraulic Actuator

Musina¹,

Tselischev²,

Tselischev³

et al. 2015

MAS

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“…The inlet valves and the outlet valves are used to apply the pressure and to decrease the pressure respectively. 18 The interface between AMESim and MATLAB/ Simulink is at the bottom of the graph.…”

Section: Pressure Modelmentioning

confidence: 99%

Real-time estimation of the pressure in the wheel cylinder with a hydraulic control unit in the vehicle braking control system based on the extended Kalman filter

Jiang

Miao

Wang

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part D:

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The pressure in the wheel cylinder plays an important role in the anti-lock braking system, but direct measurement usually needs expensive sensors. Therefore, estimation of the pressure in the wheel cylinder is of great significance to optimize the algorithm of the anti-lock braking system. There are two commonly used estimation methods: one is based on the hydraulic model, and the other is based on the equation for the tyre dynamics. Both of these, however, suffer from inadequacies. The former method is sensitive to the accuracy of the model in practical applications, and an accumulated error appears if some parameters of the process are not sufficiently accurate. In the latter method the pressure in the wheel cylinder is calculated for each cycle but, when the vehicle is running, the fluctuations in the deceleration are relatively large. To estimate the pressure more accurately, a novel method is proposed in this paper, which combines these two methods on the basis of the extended Kalman filter. The method can compensate for the inadequacies of the two methods mentioned above by using the variation in the wheel speed as the observation variable to modify the hydraulic model. It can decrease its sensitivity to the accuracy of the hydraulic model and improve the accuracy of the estimated magnitude of the pressure. The estimated results are compared with the real values which are obtained by using a pressure sensor on a typical low-friction road and on an asphalt road; in addition, the effectiveness of the novel method is validated by hardware-in-the-loop tests and vehicle tests. The results show that the proposed method can provide an accurate estimation of the pressure in the wheel cylinder during hydraulic control of the anti-lock braking system or any other brake control system.

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“…The force is related only to the differential pressure, but not to the inlet pressure and the outlet pressure individually; this can also be seen in Figure 17(b). Now, on the assumption that the hydraulic force is proportional to the differential pressure, and on the basis of equation (23), the force can be derived as…”

Section: Fluid Dynamics Submodelmentioning

confidence: 99%

“…For different structures of the valve, the same fitting method can be used to introduce other variables to the model. For instance, the valve cone angles (the valve cone angle is 90°in the above model) can also be modelled in equation (23) in order to investigate its effect on the hydraulic force. Then, if the valve cone angle is regarded as a target parameter, optimization of the structure of valve can also be analysed.…”

Section: Fluid Dynamics Submodelmentioning

confidence: 99%

“…Yang et al 22 briefly modelled a hydraulic inlet solenoid valve and discussed its rise time. Liu et al 23 constructed a model of a flow valve in an anti-lock braking system by using an experimental method, and a unified strategy was employed to realize wheel-slip control based on the model. Mahanty and Subramanian 24 developed a mathematical model of an electropneumatic braking system used in heavy commercial vehicles, where a relay valve submodel was analysed in detail to predict the pressure response accurately.…”

Section: Introductionmentioning

confidence: 99%

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Non-linear dynamic modelling of a switching valve driven by pulse width modulation in the hydraulic braking system of a vehicle

Gao

Yang

Zhao

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part D:

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Fast-switching valves driven by puse width modulation have been widely used in the hydraulic braking systems (such as anti-lock braking systems or electric stability control systems) of vehicles, because of their lower cost and their functions which are similar to those of proportional valves. However, proportional valves have been widely investigated, whereas there is significantly less literature on the switching valves of the hydraulic control units in the braking systems of vehicles. In order to investigate the controllability of pressure, construction of an accurate theoretical model is the key to attaining this. Based on theoretical analysis and finite element analysis, this paper presents a non-linear dynamics model of a typical fast-switching valve. The non-linear model is composed of three submodels: a mechanical submodel, an electromagnetic submodel and a fluid dynamics submodel. The fluid momentum theorem combined with the simulation curve-fitting method is used to model accurately the fluid dynamics which are due to the varying flow field. The hydraulic force acting on the spool can be obtained directly from this model. Finally, the feasibility of the response time and the pressurization performance of the non-linear dynamics model is proved by comparing the simulation results from MATLAB/Simulink with the experimental results obtained on a test bench. The study shows that the model can be regarded as a predictive tool for future investigation.

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Flow-valve modelling and wheel-slip control for an automotive hydraulic anti-lock braking system

Cited by 7 publications

References 24 publications

Providing Cavitation-Free Operation of Hydraulic Systems under Passing Load in Hydraulic Actuator

Providing Cavitation-Free Operation of Hydraulic Systems under Passing Load in Hydraulic Actuator

Real-time estimation of the pressure in the wheel cylinder with a hydraulic control unit in the vehicle braking control system based on the extended Kalman filter

Non-linear dynamic modelling of a switching valve driven by pulse width modulation in the hydraulic braking system of a vehicle

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