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mechanical damping
Meanwhile, the ultra-precision air bearing stage driven by the linear-motor is characterized by zero mechanical damping and poor anti-disturbance.
      
Piezoelectric resonators with mechanical damping and resistance in current conduction
      
Matrix Tg reduction is attributed to the dissolved rubber and the increased mechanical damping (tan δ) is derived from the phase-separated rubber.
      
A mathematical model is presented, predicting vibrations of a permanent magnet machine, based on the modal analysis technique including mechanical damping.
      
The modulus of torsion and the mechanical damping has been investigated on test pieces of beech wood (Fagus sylvatica L.) with transverse fibre direction by means of a torsional pendulum.
      
The torsion modulus and the mechanical damping were investigated on wood swollen with formamide and a series of glycols, at frequencies of 0.5 and 0.02 Hz as a function of temperature.
      
Postcuring increased PSR to ~70% for all materials resulting in significant intensification of HS glass transition at TgH (220 to 250°C), and reduced mechanical damping and modulus-temperature dependence between -40 and 200°C.
      
Filling the lateral trunk channels with wettex (cotton/rayon staple) resulted in an increase of the auditory thresholds by 13.6-17.6?dB, indicating mechanical damping of the swimbladder.
      
This interpretation is supported by DSC, elastic modulus and mechanical damping measurements on films made from dispersions of the same latex containing commercial nonionic surfactants.
      
Using both an open-loop frequency response analysis and closed-loop simulations, we compared resonance tuning with four different feedback configurations as the mechanical resonant frequency, feedback gain, and mechanical damping varied.
      
Moreover, the differences in resonance tuning between the two positive (negative) feedback configurations increased with increasing feedback gain and with decreasing mechanical damping.
      
In order to maximize the output power, a micro controller changes the connection of the generator coils, which in effect changes the electro-mechanical damping, to keep the vibration amplitude within the allowable stroke.
      
The SNR of embedded samples (?19 dB) was significantly higher than that of non-embedded samples (?12 dB), owing to the considerable mechanical damping effect of the silicon in the 300-900 Hz bandwidth (p=0.0028).
      
Mechanical damping leads to smooth force versus deflection correlations, which considerably facilitates the determination of valid fracture mechanics characteristics.
      
This research is directed toward the development of materials of high stiffness and high mechanical damping for the purpose of damping vibrations in structures and machinery.
      
Hybrid FES gait restoration systems which combine stimulation with controllable mechanical damping elements at the joints show promise for providing good control of limb motion despite variations in muscle properties.
      
Earlier reported values of the viscosity coefficient of the refrigerant R152a (1,1-difluoroethane) have been recalculated with an improved value for the mechanical damping of the vibrating wire viscometer.
      
Amplitude-independent mechanical damping in alkali halides
      
At present there are two theories which are used to explain the observed amplitude-independent mechanical damping (internal friction) in alkali halides.
      
Young's modulus and mechanical damping of silver dental alloys
      
 

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