Development of Electro-hydraulic Actuator with Fail-safe Function for Steering System

Umehara, Yasuhiro; Kamoshita, Shogo; Ishiguri, Kotaro; Yamanaga, Yusuke

doi:10.2219/rtriqr.55.131

Cited by 19 publications

(10 citation statements)

References 1 publication

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“…In their studies, the Fig. 23 Examples of steering schemes: active steering bogie with two actuators [93] (left) and active steering bogie with one actuator [94] (right) Fig. 24 Yaw relaxation scheme [96] control strategy applied was a robust H 1 modal control.…”

Section: Implementation Of Active Secondary Suspension In Vertical DImentioning

confidence: 99%

“…Therefore, there is only one actuator implemented for each wheelset. In the right scheme, introduced by Umehara et al [94], a more elaborately designed set of connecting rods couples the front and rear wheelset motion so that only one actuator is required for each bogie to achieve the steering effect. Reducing the number of actuators by introducing articulated mechanical linkages can save installation space and cost for actuation system.…”

Section: Principles and Configurations (A) Actuated Solid-axle Wheelsmentioning

confidence: 99%

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Active suspension in railway vehicles: a literature survey

Giossi

Persson

et al. 2020

Rail. Eng. Science

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Since the concept of active suspensions appeared, its large possible benefits has attracted continuous exploration in the field of railway engineering. With new demands of higher speed, better ride comfort and lower maintenance cost for railway vehicles, active suspensions are very promising technologies. Being the starting point of commercial application of active suspensions in rail vehicles, tilting trains have become a great success in some countries. With increased technical maturity of sensors and actuators, active suspension has unprecedented development opportunities. In this work, the basic concepts are summarized with new theories and solutions that have appeared over the last decade. Experimental studies and the implementation status of different active suspension technologies are described as well. Firstly, tilting trains are briefly described. Thereafter, an indepth study for active secondary and primary suspensions is performed. For both topics, after an introductory section an explanation of possible solutions existing in the literature is given. The implementation status is reported. Active secondary suspensions are categorized into active and semi-active suspensions. Primary suspensions are instead divided between acting on solid-axle wheelsets and independently rotating wheels. Lastly, a brief summary and outlook is presented in terms of benefits, research status and challenges. The potential for active suspensions in railway applications is outlined.

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Section: Implementation Of Active Secondary Suspension In Vertical DImentioning

confidence: 99%

Section: Principles and Configurations (A) Actuated Solid-axle Wheelsmentioning

confidence: 99%

Active suspension in railway vehicles: a literature survey

Giossi

Persson

et al. 2020

Rail. Eng. Science

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“…This condition is consistent as long as the vehicle is negotiating a curve. Substituting the solution of Equation (A5): The solution to Equation (A8) gives the reference signal of Equation (5). When Equation (5) is substituted into Equation (A5) the reference signal of Equation (6) can be obtained.…”

Section: ∂Tmentioning

confidence: 99%

“…In contrast, active wheelset steering can leave the hunting stability task to passive suspensions and focus on curving performance. A combination of passive steering linkages and active steering control can also be applied to improve performance of bogies (Park et al [4] and Umehara et al [5]). Concerning solid axle wheelsets, significant improvements in terms of wear behaviour, often expressed with the so called Tγ values, are demonstrated in recent years when active steering is applied.…”

Section: Introductionmentioning

confidence: 99%

Improved curving performance of an innovative two-axle vehicle: a reasonable feedforward active steering approach

Giossi

Persson

Stichel

2020

Vehicle System Dynamics

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A mechatronic rail vehicle with reduced tare weight, two axles and only one level of suspension is proposed with the objective of reducing investment and maintenance costs. A wheelset to carbody connection frame in composite material will be used both as structural and as suspension element. Active control is introduced to steer the wheelsets and improve the curving performance. A feedforward control approach for active curve steering based on non-compensated lateral acceleration and curvature is proposed to overcome stability issues of a feedback approach. The feedforward approach is synthesised starting from the best achievable results of selected feedback approaches in terms of wheel energy dissipation and required actuation force. A set of 357 running cases (embracing 7 curves, 17 speeds per curve and 3 conicities) is used to design the controller. The controller is shown to perform well for conicity and track geometry variations and under the presence of track irregularities.

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“…Umehara has performed active steering control tests in the curve section of the factory test line using active steering bogie prototypes equipped with an electro-hydraulic actuators, and analyzed the reduction of wheel lateral force. [7] Suzuki tested the wheel lateral force reduction according to active steering control in the steep curve of the factory test line for a prototype steering bogie with a pneumatic active steering system. [8] Hur developed an active steering bogie prototype for EMU (electric multiple unit) train installed an electro-mechanical actuator and conducted steering performance test according to active steering control on an commercial line rather than the factory line.…”

Section: Introductionmentioning

confidence: 99%

Analysis on Steering Performance of Active Steering Bogie According to Steering Angle Control in Curve Section

Hur¹,

Shin²,

Ahn³

2020

Preprint

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The steering performance according to the steering angle control was tested by using the active steering bogie developed to reduce excessive wheels and rail wear and noise generated when the railway vehicle run in a curved section. As a result of the test of increasing the steering angle in accordance with the target steering angle in the 300m radius of curvature, the bogie is gradually aligned in the radial steering position, and when the control is carried out to 100% of the target steering angle, the bogie angles of the front and rear bogies appeared almost the same. As the steering angle increased, wheel lateral force and derailment coefficient also decreased. Therefore, the validity of the radial steering position control method applied in this paper was confirmed experimentally. This test results will be used for future research on active steering bogie commercialization.

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Development of Electro-hydraulic Actuator with Fail-safe Function for Steering System

Cited by 19 publications

References 1 publication

Active suspension in railway vehicles: a literature survey

Active suspension in railway vehicles: a literature survey

Improved curving performance of an innovative two-axle vehicle: a reasonable feedforward active steering approach

Analysis on Steering Performance of Active Steering Bogie According to Steering Angle Control in Curve Section

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