crc press - the communications facility design handbook

... © 2000 by CRC PRESS LLC Medium-Frequency Radio (20 kHz to 2 MHz) The low-frequency portion of the band is used for around -the- clock communication services over moderately ... capacitance between the wires of the coil, which causes the coil to have a self-resonance between the winding capacitance and the self-inductance of the coil. Circuits ar...

Ngày tải lên: 03/07/2014, 22:55

... CRC Press LLC where f n is the nominal feed, x is the displacement of the tool in the feed direction, and τ is the time for one tool revolution. The assumption is that the ... than the tool, and the force is proportional to the instantaneous feed and the depth-of-cut and does not explicitly depend upon the cutting speed. The instantaneous ch...

Ngày tải lên: 21/06/2014, 21:20

... in the early design steps. At any stage the use of more complex models is possible for evaluating the performance or more advanced design strategies. If the design methods allow, design- by-simulation ... 2002 by CRC Press LLC on co-simulation (see Veitl et al. 15 ). A brief list includes ADAMS, SIMPACK, MATLAB-SIMU- LINK MATRIXx-SystemBuild. 13.2.1.2 Design Model...

Ngày tải lên: 21/06/2014, 21:20

... 200 205 -6 0 -5 5 -5 0 -4 5 -4 0 -3 5 -3 0 -2 5 -2 0 Frequency (Hz) No Shunt With Shunt Passive damping Frequency (Hz ) 160 165 170 175 180 185 190 195 200 205 -5 0 -4 5 -4 0 -3 5 -3 0 -2 5 -2 0 -1 5 -1 0 Integrated ... displacement at the position for time , is the mass/length of the beam, is the bending stiffness of the beam, i...

Ngày tải lên: 21/06/2014, 21:20

... 1.9 1.95 2 10 -4 10 -3 10 -2 10 -1 10 0 10 1 Length L Stiffness K (k v ) δ 0 = 8° δ 0 = 11° δ 0 = 14° δ 0 = 17° -0 .4 -0 .2 0 0.2 0.4 0.6 0.8 1 1.2 1.4 10 -4 10 -3 10 -2 10 -1 10 0 10 1 Force ... shows how to design the C4T1 i structure to minimize the use of mass by replacing the bar with the C4T1 i structure such that the stiffness of...

Ngày tải lên: 21/06/2014, 21:20

... the y-direction. The effect of the prestress on the bending stiffness is also shown in Figures 17.53 and 17.54. The following conclusions about the bending characteristics of the two-stage 3-bar ... satisfying the existence condition for the two-stage 3-bar SVD-type tensegrity studied here. It is interesting to explore the factors defining the boundaries of the domain o...

Ngày tải lên: 21/06/2014, 21:20

... deformations -two deformatio -one dynamic mode -two deformations -two deformatio -one dynamic mode -one deformation elastic surface: -no dynamic mode -one deformation rigid surface -no dynamic mode -no ... m k is the link mass. The moment of the couple can be expressed in Euler’s form (20.45) where is the tensor of inertia. Couple (20.45) is expressed in the link-fixed frame and t...

Ngày tải lên: 21/06/2014, 21:20

... acting upon the right-hand side of the piston reduces, but it is still stronger than the pressure acting upon the left-hand side. Hence, the piston continues moving to the left. The pressure on both ... follows the changes of the current. The nonlinear static characteristic of the servovalve (flow depending on the pressure and the piston position) has the form (21.1...

Ngày tải lên: 21/06/2014, 21:20

... fixed in the given positions . The moment of inertia of the mechanism about the axis of the i-th joint depends on the angles (positions) at which the joints behind the i-th joint in the kinematic ... (23.2) where is the output angle of the motor shaft after-reducer; is the gear ratio; is the inertia of the motor actuator; is the viscous friction coefficient; is t...

Ngày tải lên: 21/06/2014, 21:20