Damping

this lab is to observe the behavior of a metal block while experiencing uniaxial translation and oscillation in respects to time to calculate the acceleration, spring constant, and damping factor. The experiment was split into two different labs. Part one, the drop test, to take the block to a fixed height and drop it. This would then allow us to calculate the friction force, along with the acceleration of the metal block. Part two, the bounce test, is attaching the metal block to the spring, pushing the block down and releasing it. We would use these data to calculate the damping factor and the spring constant. To accomplish the different experiments we needed the use of a Linear Variable Differential Transformer…

Granite- Reasonable dimensional stability, Good wear resistance, Better internal damping. Difficult to be machined, scarce, high price, low conductivity, absorbs coolant. Granite has some major flaws, like the ones which are listed below. • It is difficult to machine this material into required size andshape • Its scarcity and price • Low thermal conductivity leading it to heat concentration andeventual cracking, Ceramics- Stiffness, strength, corrosion resistance, dimensional stability, good…

arm. Oscillation period of the pendulum is twice bigger than the period of the lever oscillation. Piston of the pump has reverse effect on the lever and damps its oscillation. Damping of the lever motion causes damping of the pendulum, but the work of the force damping the pendulum is less than the work of the forces which damp the lever. Equilibrium position of the lever is horizontal, and the equilibrium position of the pendulum is vertical. Oscillation of the lever and the pendulum take place…

From the plot, it is understood that damping values of the specimens have shown slight improvement by the addition of 5% cast iron particles as filler material. Higher damping values are obtained for granite epoxy ratios such as 80:20, 75:25, 60:40 and 50:50 with 5% filler material. The damping values results in a moderate drop with the increment in filler percentage in the specimen. The logarithmic decrement curve is similar to the damping curve with better values obtained by the addition of 5%…

Since the friction force remains constant on condition that the rotor is unidirectional at all speeds, friction damping type will not result in valuable damping force. If the motor’s load cannot provide adequate viscous mechanical damping, it will run unstable when in “medium speed region”. This is where the back-EMF produced curve has a considerable steep negative slope. In the medium speed range, the back-EMF will increase vibrations (by exponential law) rather than decrease them. Therefore,…

relay settings of microgrid relays and had designed a prototype for its testing. I was able to meet the optimal standards for a relay using Dual Simplex. I realized from this paper how I could ensure robustness through optimization theory: by defining a performance index and iterating until the system satisfies it. During this year, I realized the relevance of optimization in control theory as well. For my final year project, I am developing a Linear Quadratic Regulator based control for active…

test data. Figure ef{fig12} depicts the estimated principle coefficients of the two bearings. With the increase of the excitation frequency, the principle stiffness coefficients of the left bearing remain nearly invariant, while those of the right bearing decrease a little. The principle damping coefficients of the left bearing slightly decrease with the excitation frequency, and those of the right bearing almost keep horizontal except for a small projection at 70Hz. Moreover, the principle…

more than 16ply i.e 17.4E29 and 6.3E29 respectively. This was due to the presence of carboxylic group on CNTs which create more internal friction, and restrict more chain mobility, which is also represented in figure 3(b).The peak intensity of the, 16Ply fun has increases over 16ply which corresponds to higher energy dissipation. Further the effect of post curing is also noticeable in 16ply 200 but in case of 16ply fun 200 the was reversible cross link density was reduced due to thermal…

AJ (1993) Development of a hybrid bridge evaluation system, Ph.D. thesis. University of British Columbia, Vancouver). The eigenfrequencies are simply identified as the The method is named after the key step of the method: the identification of the eigenfrequencies as the peaks of the spectrum plots. This method gives accurate results only under the conditions of low damping, well-separated eigenfrequencies and only one mode is dominant around a resonance. In other cases, the method leads to…

pieces and those pieces are rolled around a hollow tube. • This tube is then placed into racket shaped mold. • Then this mold is heated and air is passed through it. • Due to the combine action of heat and air pressure bonding takes place between the various layers of the sandwich. • After this racket is taken out for further finishing operations. G.P. Braggemann and his co workers, Germany has presented papers on “Decoupling of the tennis racket frame decreases grip vibrations”. They…