Brake and pneumatic wheel performance assessment – A new test rig

Cantoni, Carlo; Gobbi, Massimiliano; Mastinu, Giampiero; Meschini, Andrea

doi:10.1016/j.measurement.2019.107042

Cited by 5 publications

(4 citation statements)

References 30 publications

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“…𝑀𝑀rr moment due to rolling resistance 𝐽𝐽d moment of inertia of the drum (plus transmission and flywheels) 𝐽𝐽w moment of inertia of the wheel around its axis 𝜔𝜔 angular speed of the wheel Ω angular speed of the drum 𝑀𝑀rr refers to the moment due to the offset of the resultant forces coming from the pressure distribution in the wheel-drum contact region (Figure 5). For more details see [39]. The core innovation of the BRAD is the location of load cells that allow the monitoring of all of the relevant forces acting at the brake and at the tire during braking (Figure 6).…”

Section: Brad Concept Designmentioning

confidence: 99%

“…For sake of space the complete accuracy analysis is omitted here, but relevant results are reported. A complete analysis of the accuracy of the BRAD is presented in [39].…”

Section: Accuracymentioning

confidence: 99%

“…The dynamometer that has been developed (BRAD) can measure all of the relevant forces that act when the wheel is locking during a hard braking maneuver. The scientific presentation of the test rig as a measurement instrument can be found in [39].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Tire and Brake Interaction - A New Test Rig to Study Wheel Locking

Cantoni¹,

Gobbi²,

Mastinu³

et al. 2021

SAE Technical Paper Series

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The paper investigates the dynamics of the tire and brake during hard braking or wheel locking, from the view point of a brake manufacturer. A new test rig, named BRAD (BRembo Automotive Dynamometer) is presented which measures the forces acting both at the brake and at the tire-ground interface. Lateral forces are not measured. In the test rig, the ground is represented by a drum. The features of the test rig are presented. The measurement accuracy is declared. The first result is that, near wheel locking, a substantial part of the braking power is generated by the tire and not by the brake. The test rig quantifies such a partitioning of brake power, which is important for current and future electric motorsport activities. Some 30% of the braking power is due to tire during hard braking. The second result is that, due to such important braking power at the tire, the tire is heated up, which increases considerably the maximum friction. This implies that brakes interact with tires near wheel locking. The new test rig enables to study such an interaction.

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Section: Brad Concept Designmentioning

confidence: 99%

“…For sake of space the complete accuracy analysis is omitted here, but relevant results are reported. A complete analysis of the accuracy of the BRAD is presented in [39].…”

Section: Accuracymentioning

confidence: 99%

See 1 more Smart Citation

Tire and Brake Interaction - A New Test Rig to Study Wheel Locking

Cantoni¹,

Gobbi²,

Mastinu³

et al. 2021

SAE Technical Paper Series

View full text Add to dashboard Cite

show abstract

“…In the automated production line of a modern factory, it is more and more common to use small pneumatic equipment to perform automated tasks, such as material feeding and parts pushing [1][2][3][4][5]. The use of pneumatic equipment has the advantages that hydraulic or electrical equipment is incomparable: clean energy, simple transmission loop, easy maintenance, and so on.…”

Section: Introductionmentioning

confidence: 99%

A Real-Time Realization Method for the Pneumatic Positioning System of the Industrial Automated Production Line Using Low-Cost On–Off Valves

et al. 2021

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In the industrial automated production line, how to use the existing low-cost pneumatic equipment to obtain the best positioning effect has become a significant engineering problem. In this paper, a differential switching method is proposed in a pneumatic servo system consisting of four low-cost on–off valves for more precise control and lower prices. All valves are simultaneously open at the initial stage of each control period, and the differential closing time of the desired valves is calculated through the theoretical models. A sliding mode controller is applied with the proposed method, and the system stability is proven. The real-time control setup including three software layers is proposed to implement the algorithm. Several experiments are performed on a real-time embedded controller. Average 0.83% overshoot and 0.18 mm steady-state error are observed in the step response experiment. The highest frequency of sine wave that can be tracked is 1 Hz, and the average error is 1.68 mm. The maximum steady-state error is about 0.5 mm in the step response under payloads of 5.25 kg. All the simulation and experimental results prove the effectiveness of the control method.

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