Optimization of the Brake Factor for an S-Cam Foundation Brake using RSM

Sayim, Irfan; Zhang, Dan

doi:10.5545/sv-jme.2016.3459

Cited by 7 publications

(3 citation statements)

References 9 publications

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“…Mixture design is an experimental design strategy for mixing multiple components to create a compound to identify the effect of individual components on the reaction variables and to derive the optimum mixing ratio [24][25][26][27]. Let xi represent the ratio of the n-th component in a compound consisting of q components.…”

Section: Mixture Designmentioning

confidence: 99%

Optimization of Accelerator Mixing Ratio for EPDM Rubber Grommet to Improve Mountability Using Mixture Design

Kim

Kim²,

Jeon

2019

Applied Sciences

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A grommet, made of ethylene propylene diene methylene (EPDM) rubber, is an integral part used for fixing and protecting the wire inserted from the outside to the inside of vehicles. Rubber compounds exhibit various mechanical properties and vulcanization characteristics depending on the accelerator mixing ratio. These mechanical properties affect the insertion and detachment forces when the grommet is manufactured and fixed to the vehicle body. In this study, we experimentally analyzed the changes in the properties of EPDM rubber depending on the vulcanization accelerator to improve the mounting performance of the grommet, and subsequently derived the optimum accelerator mixing ratio. We implemented a mixture design strategy to derive the optimum mixing ratio for obtaining the desired mechanical properties and vulcanization characteristics. The insertion and separation forces of the existing grommet were compared with those of the grommet fabricated using the derived mixing ratio and we found that the mounting performance was improved compared to the existing grommet.

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Section: Mixture Designmentioning

confidence: 99%

Optimization of Accelerator Mixing Ratio for EPDM Rubber Grommet to Improve Mountability Using Mixture Design

Kim

Kim²,

Jeon

2019

Applied Sciences

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“…For instance, Sayim and Zhang have conducted dimensional analysis and experiments to show that the drum brake is able to achieve comparable performance to that of a disc brake. 8 These results were important, but being dimensionally dependent, they were not generalized for all brake designs. Huang et al.…”

Section: Introductionmentioning

confidence: 96%

Sensitivity analysis and Taguchi optimization procedure for a single-shoe drum brake

Khafaji

Manring

2019

Proceedings of the Institution of Mechanical Engineers, Part C:

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Drum brakes have dominated the braking industry for many years and will most likely continue to do so for the foreseeable future due to their low cost and adequate operating performance. Basic equations for conventional brake are presented, while complicated analysis has been published using finite element methods to predict brake squeal and instability. This paper seeks to step away from the complexity of numerical models to consider the fundamental braking phenomenon of a single-shoe drum brake, using nondimensional, closed-form analysis and a Taylor series expansion to examine the effects of perturbing dimensionless design parameters. In addition, an optimal design for the conventional brake is achieved using Taguchi method. In conclusion, this paper shows that the braking torque is dependent upon only four dimensionless groups, and that two of these groups dominate the physics of braking. Furthermore, it is shown that adjustments to these two dominating groups have a direct impact on the contact pressure between that shoe material and the brake drum, and that this pressure must be kept below the yield strength of the braking material in order to prevent a mechanical failure of the brake. Since the results are nondimensional, they are generally applicable to all single-shoe drum brakes having a design with mechanical features that are similar to the one analyzed in this paper. There is very good agreement between the results of both Taguchi and sensitivity regarding the significance and insignificance of the design parameters.

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“…Although nondimensional studies have not been performed to the authors' knowledge, other dimensional research has been conducted to optimize the design of drum brakes. For instance, Sayim and Zhang have conducted dimensional analysis and experiments to show that the drum brake is able to achieve comparable performance to that of a disc brake [73]. These results were important, but being dimensionally dependent they were not generalized for all brake designs.…”

Section: Generalmentioning

confidence: 99%

Sensitivity analysis and optimal design of conventional and magnnetorheological fluid brakes

Khafaji¹

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Mechanical and electrical brakes have dominated the braking industry for many years and will most likely continue to do so for the foreseeable future due to their low cost and adequate operating performance, wide range of applications, vehicle engineering, civil engineering, and biomedical engineering. Simple mechanical drum brake and magnetorheological (MR) fluid brake have presented in the current work. The main objective of this work is to increase braking torque, and to develop a new optimal design of MR fluid brake with better design and design control of the MR fluid design. To do so, four important steps have been accomplished. In the first step, a mathematical modeling of the conventional frictional brake and MR fluid brake has been developed to study and specify all design parameters. In the second step, a nondimensional, closedform analysis and a Taylor series expansion have used to examine the effects of perturbing dimensionless design parameters on the overall brakes performance. In the third step, two optimal designs for MR fluid brakes have been developed by taking advantage of sensitivity analysis and the design of experiments method also known as the Taguchi method. In the fourth step, controlling a MR fluid brake is performed by using two parallel PI controls for controlling the magnetic current and MR fluid thickness simultaneously. It was concluded that sensitivity analysis is a good method for identifying the parameters that have the greatest impact on brake performance and can be used as one method for the designer to obtain an optimal design. Four nondimensional design parameters were successfully used to describe the conventional frictional brake and seven nondimensional design parameters for MR fluid brake. Only two parameters for the conventional brake and five parameters for the MR fluid brake affect the performance and the others can be neglected. Two new designs for the MR fluid brake are presented and shown to be very simple in design, low in cost by removing a lot of additional auxiliaries for the frictional brake, and easy for control. By simultaneously controlling the MR fluid thickness and the electric current, a large range of brake torque is achieved without increasing the radial envelop for the brake, and saturation conditions in one controller are compensated for by the other controller. High angular velocities of the brake are primarily controlled by increasing the MR fluid thickness, while low angular velocities are primarily controlled by increasing the electric current. Good transient responses for regulating a constant speed (high, moderate, and low), and good stability while seeking to track a sinusoidal input have been achieved. In summary, the proposed control system for the MR fluid brake has demonstrated good controllability for the MR fluid brake.

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Optimization of the Brake Factor for an S-Cam Foundation Brake using RSM

Cited by 7 publications

References 9 publications

Optimization of Accelerator Mixing Ratio for EPDM Rubber Grommet to Improve Mountability Using Mixture Design

Optimization of Accelerator Mixing Ratio for EPDM Rubber Grommet to Improve Mountability Using Mixture Design

Sensitivity analysis and Taguchi optimization procedure for a single-shoe drum brake

Sensitivity analysis and optimal design of conventional and magnnetorheological fluid brakes

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