Optimal design of variable assist characteristics of electronically controlled hydraulic power steering system based on simulated annealing particle swarm optimisation algorithm

Tang, Bin; Jiang, Haobin; Gong, Xiaoqing

doi:10.1504/ijvd.2017.082596

Cited by 11 publications

(5 citation statements)

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“…However, limited by motor costs, vehicle battery voltage, and other factors, electric power steering systems are not widely used in commercial vehicles. 3,4 Unmanned driving has become a research hotspot in the field of vehicles, and the electrification of the steering system of unmanned vehicles is an important part of realizing unmanned driving. According to the "ISO26262" of the International Standards Organization (ISO), the functional safety of the steering system can be evaluated.…”

Section: Introductionmentioning

confidence: 99%

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Displacement characteristics hierarchical control of electro-hydraulic compound steering for commercial vehicle

Liu

Wang

Zhao

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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The electro-hydraulic compound steering combines the function of electric power steering and hydraulic power steering, which can reduce the energy consumption of steering, ensure the stability of vehicles, and meet the steering demand under unmanned driving. In order to fully coordinate the steering stability and path tracking requirements in the unmanned steering process, this paper proposes a hierarchical control strategy of displacement characteristics for commercial vehicle electro-hydraulic compound steering. The mixed H2/H∞ controller for the vehicle stability is designed in the upper layer, which takes the vehicle yaw rate as the control variable. Based on the motor model and sliding-mode control theory, the sliding-mode variable structure controller of motor angle is designed in the lower layer, and the hydraulic power distribution is completed by estimating the steering resistance torque. Simulation results show that the designed controller can effectively track the yaw rate on the premise of ensuring path tracking effect. Combined with steering torque estimation and hydraulic power distribution rules, it can effectively realize the coordinated control of hydraulic power and motor rotation angle.

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Section: Introductionmentioning

confidence: 99%

“…However, limited by motor costs, vehicle battery voltage, and other factors, electric power steering systems are not widely used in commercial vehicles. 3,4…”

Section: Introductionmentioning

confidence: 99%

Displacement characteristics hierarchical control of electro-hydraulic compound steering for commercial vehicle

Liu

Wang

Zhao

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

show abstract

“…The HAGC system is complex with multiple links-it is nonlinear and has several parameters that influence its functioning. Because the system's working mechanism is multifaceted, it is difficult to analyze its instability, a problem that researchers in the engineering field have been trying to solve [2][3][4]. Scholars are currently studying the dynamic characteristics of the HAGC system.…”

Section: Introductionmentioning

confidence: 99%

Absolute Stability Condition Derivation for Position Closed-Loop System in Hydraulic Automatic Gauge Control

et al. 2019

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In the metallurgical industry, hydraulic automatic gauge control (HAGC) is a core mechanism for thickness control of plates used in the rolling process. The stability of the HAGC system’s kernel position closed-loop is key to ensuring a process with high precision, speed and reliability. However, the closed-loop position control system is typically nonlinear, and its stability is affected by several factors, making it difficult to analyze instability in the system. This paper describes in detail the functioning of the position closed-loop system. A mathematical model of each component was established using theoretical analysis. An incremental transfer model of the position closed-loop system was also derived by studying the connections between each component. In addition, based on the derived information transfer relationship, a transfer block diagram of disturbance quantity of the system was established. Furthermore, the Popov frequency criterion method was introduced to ascertain its absolute stability. The results indicate that the absolute stability conditions of the position closed-loop system are derived in two situations: when spool displacement is positive or negative. This study lays a theoretical foundation for research on the instability mechanism of an HAGC system.

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“…Nowadays, heavy-duty commercial vehicles are widely equipped with a hydraulic power steering (HPS) system, with an assist characteristic that is relatively single and an assist effort cannot vary with vehicle speed, which would easily cause poor road feel and affect handling stability during high-speed steering. On the other hand, whether the vehicle is going straight or steering, the steering pump in HPS is always running along with the engine, which causes a large amount of energy loss [1,2]. Recently, the electric power steering (EPS) system has been widely used in passenger cars and light commercial vehicles for its advantages of safety, energy saving and environmental protection.…”

Section: Introductionmentioning

confidence: 99%

Study on Low-Speed Steering Resistance Torque of Vehicles Considering Friction between Tire and Pavement

et al. 2019

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Electric power steering (EPS) systems under existing vehicle power systems cannot provide enough power for heavy-duty commercial vehicles under pivot or low-speed steering conditions. To solve this problem, the paper proposes an EPS system that is based on the hybrid power system constituted by the vehicle power system and the supercapacitor in parallel. In order to provide a theoretical basis for the intervention and withdrawal mechanisms of a super-capacitor in the new EPS, the law of steering resistance torque at a low or extremely low vehicle speed should be explored. Firstly, the finite element model of tire/pavement was established to conduct the simulation and calculation of the low-speed steering friction force between the tire and pavement, and to obtain the fitting expression of the equivalent steering friction coefficient with the running speed of the tire. Secondly, the expression of the steering friction torque was deduced based on the calculus theory and mathematical model of the low-speed steering resistance torque, including the steering friction torque and aligning torques, established to conduct the simulation of the equivalent resistance torque applied on a steering column under low-speed condition. Subsequently, the real vehicle experiments were carried out and comparisons of the experimental results and simulation results was performed. The consistency indicated that the model of low-speed steering resistance torque had a high accuracy. Finally, the law of low-speed steering resistance torque with a vehicle speed and steering wheel angle were analyzed according to the 3D surface plot drawn from the simulation results.

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Optimal design of variable assist characteristics of electronically controlled hydraulic power steering system based on simulated annealing particle swarm optimisation algorithm

Cited by 11 publications

References 0 publications

Displacement characteristics hierarchical control of electro-hydraulic compound steering for commercial vehicle

Displacement characteristics hierarchical control of electro-hydraulic compound steering for commercial vehicle

Absolute Stability Condition Derivation for Position Closed-Loop System in Hydraulic Automatic Gauge Control

Study on Low-Speed Steering Resistance Torque of Vehicles Considering Friction between Tire and Pavement

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