Braking pressure control in electro-hydraulic brake system based on pressure estimation with nonlinearities and uncertainties

Han, Wei; Liu, Xiong; Yu, Zhuoping

doi:10.1016/j.ymssp.2019.02.009

Cited by 48 publications

(28 citation statements)

References 21 publications

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“…Both u i and i are measured using sensors mounted on solenoid valves. F s is calculated by equation (13). After the spool position is obtained, the wheel cylinder pressure can be calculated by the method described below.…”

Section: Pressure Estimation and Pressure Control Methodsmentioning

confidence: 99%

“…Due to the increasingly higher requirements for control accuracy and speed of the wheel cylinder pressure control system, the PID algorithm has gradually failed to meet the demand. Aiming at the various defects of PID control algorithms, such as poor real-time control system, poor robustness, easy to generate oscillations in the integration link, susceptibility to external disturbances, and sensitivity to changes in system parameters, various advanced and effective control theories [11][12][13] were used to design the wheel cylinder pressure controller. e hydraulic pressure control unit (HCU) is the core unit of the hydraulic pressure control system.…”

Section: Introductionmentioning

confidence: 99%

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Pressure Estimation and Pressure Control of Hydraulic Control Unit in Electric-Wheel Vehicle

Zhang

Wen-bo

Liu

2020

Mathematical Problems in Engineering

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In order to improve the braking performance and safety performance of electric vehicles driven by a hub motor, the cylinder pressure estimation and pressure control of its hydraulic braking system are studied. In this paper, a mathematical model is established for the solenoid valve, a key component of the hydraulic actuator, and the hydraulic and electrical characteristics of the solenoid valve are studied. A state equation is established for the solenoid valve, and the square root volume Kalman filter (SRCKF) algorithm is used to estimate the solenoid valve spool position. The brake fluid flow and brake wheel cylinder pressure are calculated based on the spool position. Finally, a solenoid valve spool position control algorithm based on sliding mode variable structure algorithm is designed, and the brake pressure in the brake wheel cylinder is controlled by adjusting the spool position. Matlab/Simulink-AMESim software simulation and hardware-in-the-loop were used to verify the algorithm. Simulation results show that the brake cylinder pressure can be estimated accurately, and the pressure control algorithm can accurately follow the control target value.

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Section: Pressure Estimation and Pressure Control Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pressure Estimation and Pressure Control of Hydraulic Control Unit in Electric-Wheel Vehicle

Zhang

Wen-bo

Liu

2020

Mathematical Problems in Engineering

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“…where θ er is the desired motor position; p mcr , the desired master cylinder pressure; and T mr , the nominal torque at the gearbox input. The pressure-dependent Coulomb + viscous friction model T FM 8,11 is adopted in this work. In order not to interfere with the work of ABS, the desired pressure of PRL is set much higher than the block pressure.…”

Section: Prl Designmentioning

confidence: 99%

Master cylinder pressure reduction logic for cooperative work between electro-hydraulic brake system and anti-lock braking system based on speed servo system

Liu

Han

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part D:

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As one feasible solution of brake-by-wire systems, electro-hydraulic brake system has been made available into production recently. Electro-hydraulic brake system must work cooperatively with the hydraulic control unit of anti-lock braking system. Due to the mechanical configuration involving electric motor + reduction gear, the electro-hydraulic brake system could be stiffer in contrast to a conventional vacuum booster. That is to say, higher pressure peaks and pressure oscillation could occur during an active anti-lock braking system control. Actually, however, electro-hydraulic brake system and anti-lock braking system are produced by different suppliers considering brake systems already in production. Limited signals and operations of anti-lock braking system could be provided to the supplier of electro-hydraulic brake system. In this work, a master cylinder pressure reduction logic is designed based on speed servo system for active pressure modulation of electro-hydraulic brake system under the anti-lock braking system–triggered situation. The pressure reduction logic comprises of model-based friction compensation, feedforward and double closed-loop feedback control. The pressure closed-loop is designed as the outer loop, and the motor rotation speed closed-loop is drawn into the inner loop of feedback control. The effectiveness of the proposed controller is validated by vehicle experiment in typical braking situations. The results show that the controller remains stable against parameter uncertainties in extreme condition such as low temperature and mismatch of friction model. In contrast to the previous methods, the comparison results display the improved dynamic cooperative performance of electro-hydraulic brake system and anti-lock braking system and robustness.

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“…Weiwei Gu proposed an output feedback with the integration of an extended state observer (ESO) to improve the ability of the traditional MPC to redundant disturbances evidently [14]. Through experiments and simulations, Wei Han verified that brake-by-brake control system achieves satisfactory tracking performance and robustness in the presence of uncertainty, nonlinearity and disturbance [15]. Xiuxing Yin et al proposed a control strategy combining pitch angle controller with adaptive control, which has a good performance for accurate pitch angle tracking and generator power control, regardless of various uncertainties and interference [16].…”

Section: Introductionmentioning

confidence: 98%

Research on the Steam Valve Joystick Loading System and its Control Strategy

et al. 2020

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In this paper, an idea about the hydraulic loading device is proposed to simulate the working mechanical environment of the steam valve joystick. The simulation based on the mathematical model of active and passive loading system is utilized to reveal that the stiffness of connection components in loading system has an important influence on the control accuracy of the system. Additionally, the paper provides a design on the structure of the connecting components of valve stem. For the control strategy, a dual inertia link is used to stabilize the system. Besides, a compensation method of partial structural invariance is adopted to reduce the influence of redundant force in passive loading test. Finally, The development mode of control engineering based on xPC rapid control prototype model is used to validate the loading system. The simulation and experimental results show that the dual inertia link and compensation method are effective techniques, and the passive loading error can be controlled within the tolerance of 300N. INDEX TERMS Hydraulic loading system, dual inertia link stabilization, principle of partial structure invariance, xPC rapid control prototype.

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Braking pressure control in electro-hydraulic brake system based on pressure estimation with nonlinearities and uncertainties

Cited by 48 publications

References 21 publications

Pressure Estimation and Pressure Control of Hydraulic Control Unit in Electric-Wheel Vehicle

Pressure Estimation and Pressure Control of Hydraulic Control Unit in Electric-Wheel Vehicle

Master cylinder pressure reduction logic for cooperative work between electro-hydraulic brake system and anti-lock braking system based on speed servo system

Research on the Steam Valve Joystick Loading System and its Control Strategy

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