The contact stiffness used for normal load changes can simulate the normal load acting between the liner and disk contact. The liner is composed of a flexible non-metallic material, such as a paperboard or rubber, and the contact stiffness is a non-linear function of the normal load. The profile of the profile of the friction disc changes in thickness in the circumferential direction, the so-called DTV, which is represented by the difference between the maximum thickness and the minimum thickness of the disc. Because the extreme value of DTV plays a key role in the braking dynamic model, the disc thickness can be reduced to a sine function by one-step rotation: tv=tmax-tmin=tmean=DTV2cosθ. At the same time, the display value of the brake disc is not caused by the pad and disc. The net normal load of the contact area between the two sides, because the outer normal load on the side of the disk cancels the inner normal load on the other side. Therefore, the normal interference function u at the contact can be reduced to a complex exponential function, according to u = DTV4eiθ(t) (3) For viscoelastic pads, the normal load change becomes. Dynamics simulation and dynamic test Brake torque variation by equation, total BT and BTV are Re(BTtotal)=2μ(ω) pnAcylinderReff+μ(ω)DTV2ReffK2pad+(ωCsystem)2cos where (13) from BTperturb to extreme The value to determine the size of BTV and expressed as BTV=2|Re(BTperturb)|=μ(ω)DTVReffK2pad+(ωCsystem)2 The BTV function shows that BTV is the linear ratio of friction coefficient, DTV, effective radius and total cushion stiffness. For braking systems, the damping coefficient Csystem is dependent on pressure and frequency. The formula shows that the frequency of BTV is related to the disk rotation frequency. Determination of Damping Coefficient In the braking test of the brake dynamometer, BTV decreases with increasing speed under steady-state fluid pressure. However, a few brake systems have a discrete BTV. Convergence of BTV is related to braking coefficient damping and visco-elastic damping materials for brake fluid systems and brake pads. This article does not include the damping mechanism of the braking system. Several braking system change data are provided during the braking process. It directly includes the damping effect data. Based on the formula for a given BTV data damping coefficient obtained by the following formula: Csystem (ω) = 1ωBTVDTVμ (ω) Reff2-K2pad1/2 braking system under normal pressure damping system Dynamic Simulation Results The brake rotor performs dynamic analysis under simple conditions. As shown by the BTV type, the BTV is linearly related to the μ, DTV size, pad stiffness, and liner effective radius. Some of the unknowns in the equation may be the temperature of the tablet and the pad, the number of revolutions of the tablet, the humidity, and the like. These directly affect the coefficients such as μ, DTV, and damping coefficient. In order to avoid the influence of the unknown coefficient on BT, a dynamic test was carried out under the fully pre-grinding test in the clearly specified test conditions given in Table 1. Conclusion The results of normal load changes of BTV were obtained by using the relationship between friction thickness change and system stiffness and damping. The friction coefficient processing is obtained as a non-linear function of the rotational speed in the actual damping time simulation—accurate results. The braking system damping value can be measured with a transient test. This braking model is very useful. In the future, the buffeting model of braking can be used. At the same time, it simply provides the characteristics of BTV as follows: 5.1 Parameters: μ Due to the change of the contact pressure between the disk and the pad, BTV increases linearly with μ due to the change in the rotational speed of friction transfer. Increase. Parameters: DTVDTV rotation main rotation order is a first order, resulting in a sinusoidal relationship between BTV and time. Therefore, DTV does not affect the braking performance, but it mainly acts on BTV. PARAMETER: Cushion Rigidity The highly non-linear proportional nature of the liner, for pressure, even if the friction coefficient generally decreases with increasing pressure, a high pressure will result in a high BTV. Parameters: effective radius The effective radius simply determines the braking performance, but unfortunately a high effective radius design will result in high BTV, so a large braking factor requires a small DTV and a relatively flexible brake pad. Water Film Desulphurization Dust Collector Water Scrubber,Industrial Dust Filter,Portable Dust Collector,Dust Collector Machine Industrial Dust Collector ,Wet Scrubber Co., Ltd. , http://www.nbwetscrubber.com