Modeling and Dynamic Response of Maglev Vehicles Subjected to Crosswind Gusts

1981 ◽  
Vol 103 (3) ◽  
pp. 251-258 ◽  
Author(s):  
D. P. Garg ◽  
T. M. Barrows

This paper presents a two-degree-of-freedom model for magnetically levitated finite-length vehicles incorporating sway and yaw dynamics. Aerodynamic lateral forces and yawing moments on the vehicle resulting from constant speed wind gusts are computed using analytical techniques. Computer simulations are run for three vehicle speeds and three apparent mass factors. It is shown that higher apparent mass factors can be instrumental in reducing peak displacements and acceleration levels. The guidance-to-lift ratio is not as much affected by an increase in apparent mass factor as are the displacements and accelerations.

1967 ◽  
Vol 35 (6) ◽  
pp. 351-361 ◽  
Author(s):  
J. F. Carney ◽  
L. F. Mockros ◽  
S. L. Lee

1971 ◽  
Vol 93 (1) ◽  
pp. 157-164 ◽  
Author(s):  
A. D. Dimarogonas ◽  
G. N. Sandor ◽  
A. G. Erdman

For certain tasks, four-bar linkages may not provide needed accuracy and/or structural characteristics. To overcome this, one or more bars may be added to the coupler with geared pairs to maintain a “one-degree-of-freedom” system. Utilizing complex numbers and matrix methods, a general geared n-bar function generator is developed in this paper. The computer program devised synthesizes four-bar linkages to approximate the desired function and increases the number of links by one if specifications for accuracy and other requirements are not met. Synthesized linkages are analyzed and then optimized by way of minimizing a multidimensional objective function. As a practical illustration of the n-bar theory, geared five-bar, one-loop function generators are designed to simulate the dynamic response of a two-degree-of-freedom vibrating system.


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