uin	  u-uexc	                       Displacement in the inertial frame  
uexc	 -ax/(2*pi*freq_smsld)^2	      Excitation amplitude                
tfx	  uin/uexc	                     Transfer function in x              
vexc	 -ay/(2*pi*freq_smsld)^2	                                          
vin	  v-vexc	                                                           
tfy	  vin/vexc	                                                         
wexc	 -az/(2*pi*freq_smsld)^2	                                          
win	  w-wexc	                                                           
tfz	  win/wexc	                                                         
ftfx	 (2*pi*freq_smsld)^2*m1*uin/u	                                     
ftfy	 (2*pi*freq_smsld)^2*m1*vin/v	                                     
ftfz	 (2*pi*freq_smsld)^2*m1*win/w	                                     
