International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 11 Issue: 10 | Oct 2024
p-ISSN: 2395-0072
www.irjet.net
DEVELOPMENT AND OPTIMIZATION OF MR FLUID DISK BRAKE MODEL Andriya narasimhulu1 , Prabhinder Singh Sahni2, Aditya Jain3, Japneet Singh4 , Aniket Burman5 1Professor, Mechanical Engineering, Netaji Subhas University of Technology
2,3,4,5 Students at Netaji Subhas University of Technology, Mechanical Department
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Abstract -This research paper aims to develop a
and need to be replaced regularly, which causes inconvenience and is expensive. These systems have a certain amount of delay in their response time, which can affect the effectiveness and precision of braking actions. This delay can lead to longer stopping distances and reduced control during critical situations [2].
Magneto-Rheological Fluid Brake (MRB) model in conjunction with an Anti-Lock Braking System (ABS) that showcases better performance than Conventional Hydraulic Brakes (CHB). This proposed MRB system is then compared with the CHB model. The MRB system integrates mechanical and electronic components with MR fluid, enabling more efficient and reliable braking actuation. A quarter-vehicle model integrated with a sliding mode controller is utilized to maintain optimal traction between tires and road to avoid tire locking. However, during the implementation of the sliding mode controller, occurrence of chattering, a detrimental effect, is observed. To mitigate this issue, a saturation function is applied. Finally, a more effective eradication of chattering is achieved by developing a timevarying saturation boundary layer across the switching surface. The results demonstrate significant improvements in braking performance and offer valuable insights for future advancements in automotive brake systems
1.2 Magneto-Rheological Fluid Brakes 1.2.1 MR fluids MR fluid is a smart material whose rheological characteristics change under the influence of magnetic field. The fluid is produced by mixing micron-sized iron or particles of carbonyl to carrier fluid such as oil or water and silicon. When the fluid is subjected to a magnetic field, the state of the substance changes from a fluid to a viscoelastic solid. The particles of iron particles obtain a dipole moment under the influence of magnetic field to form linear chains parallel to the direction of the magnetic field. Therefore MR fluid has a controllable yield strength that directly depends upon the magnitude of the applied magnetic field [3].
Key Words: Magneto-rheological, Anti-Lock Braking system, Sliding Mode Controller, Quarter Vehicle Model
1.INTRODUCTION
1.2.1 MR fluids
1.1 Conventional Hydraulic Brakes
MRB is a friction-based braking system. In this braking system, the magneto-rheological fluid is filled between the rotor and stator as shown in Figure 1. Since the fluid has controllable rheological properties which helps to produce shear force thus generating braking torque. When current flows through the coil, a magnetic field is generated which converts the magneto-rheological fluid in the gap into a solid-like substance immediately. It is a reversible process, when the current flow through the coil stops, the applied magnetic field also stops which allows the MR fluid to return to its liquid state [4].
Working: Conventional hydraulic brakes use an arrangement of brake pedal which is connected to a circuit(hydraulic). First brake pedal has to be pressed which impels the fluid into the master cylinder that results in pressure that pushes brake shoes against the wheels which causes braking torque to be generated because of friction [1]. Applications: CHB is commonly used in modern commercial vehicles. It is also used widely in conjunction with various other technologies like ABS, regenerative breaking, Vehicle Cruise Control etc.
The MRB has many advantages over CHB such as:
Limitations: Although popular, the CHB systems do have several limitations which are discussed in the following lines. Brake fluid under unfavorable conditions are found to be leaking, thereby leaching into soil and water bodies, and hence becoming detrimental to the environment. They are bulky in size whose installation and maintenance is challenging. The pads used in brakes wear out over time
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Impact Factor value: 8.315
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Better control and near instantaneous response time
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Since MRB doesn’t utilize the friction generated between the brake pads and rotor to slow down the car, thus significantly reducing the wear and tear between components. Hence longer service life and less maintenance
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