چكيده به لاتين
With the growth and improvement of information technology, the word smart has been widely used in the context of materials, objects and the environment and is a property found in all groups of materials.
Intelligent fluids are fluids that, in the presence of external stimuli, their rheological properties, including viscosity and yield stress, change rapidly in less than a millisecond. These fluids are divided into two general categories: electro-electrological and magnetorheological fluids. Conventional Hydraulic Brake System (CHB) Systems used in the automotive industry have several limitations and disadvantages. Such as: delay in response, brake pedal wear, need for auxiliary components (eg: hydraulic pumps, transfer pipes and brake fluid reservoir) and increase in total weight due to auxiliary components.
In this dissertation, the development of a new electromechanical brake (EMB) for automotive applications is presented. Such braking uses mechanical components as well as electrical components, resulting in more reliable and faster braking.
The proposed electromagnetic brake is a magnetic brake (MR). The MR brake consists of several rotating discs immersed in an MR fluid and an enclosed electromagnet. When current is applied to an electromagnetic coil, the MR fluid solidifies, because the stress of its operation as a function of the magnetic field applied by the electromagnet varies; this stress has a controllable action and creates shear friction on the disc. And causes braking torque.
This type of braking system has advantages such as: faster response, easy operation of a new controller, compared to existing controllers such as ABS, VSC, EPB, etc.
The MRB design process involves several stages of design, sensibility such as design, orbit, magnetism, and material selection. Initial MRB Configuration According to the set of design criteria, a detailed design is obtained using a finite element (FEM) of the MRB design.
The magnetic field strength distribution in the brake is simulated, and the results are used to calculate the braking torque.
Since the prototype MRB exhibits much lower braking torque than the CHB prototype in a smaller size, probabilistic design improvements are proposed that further increase the torque-breaking capacity.
