Essays on Damper

Literature Review

Impact Mitigation

Intelligent locomotive bumper designs have been touted as possible life-savers for pedestrians. Paden, Kelly, Hines, Botham and Simms explored the feasibility of a life-saving locomotive bumper (103). There were several motivations behind their paper. Perhaps the most important one was the high number of pedestrians that were killed every year in train impacts. Between the years 2007 and 2012, about 10,950 non-suicide deaths were attributed to train impact on humans. Including suicide deaths on railroads, 28,800 pedestrians were killed during that 6-year period. Also, Paden et al., noted that passenger trains served densely populated areas ( ...

Abstract

Further experiment is devoted to an adjustable air damper coefficient measurement. To calculate this coefficient, a flexible air damper is used in the experiment. Three integrative components of the experiments were applied: Lab View, air damper, and the potentiometer. First, test focuses on the equation ratio between the position and the voltage (d = -0.3504 V + 1.8397). Further, the experiment considers velocity measurement with the help of different weights. The main statement of the experiment is that the Damping factor Value is 2.8111lb*s Incp. Based on this value, further experiment is conducted. This value means a constant nature of ...

Abstract

Permanent magnet synchronous motors (PMSM) are a type of motors that have permanent magnets mounted on the rotors instead of the rotor windings. This particular design gives the motor a few advantages over ordinary induction synchronous motors. The magnets attached to the rotor do not require excitation, which reduces the power consumption in PMSM. This gives the motor high operational efficiency and reduces the motor active diameter. PMSM are therefore associated with applications that require high torque but have limited operation space. The permanent magnets suffer from flux leakage and are therefore aligned in a pattern that minimizes flux ...