What kind of time response occurs for a right half pole?

can someone tell what kind of time response occurs for a right half pole and can it be compensated ina anyway.....if anybody has any reading material on this topic then plz upload...

right half pole

the response is ~Aexp(+bt)[Bsin(wt)+Ccos(wt)] (rising exponent)
theoretically you can compensate it with zero at the same place, but in practice it doesn't work

right half pole

If i try to visualize a RHP in 3-D (dimension) in
s-plane will it look like same as the one in LHP.Because for LHP in s-plane as moving away from a pole the value of function exponentially decreases since damping is less then 0 .

Then for RHP how will my pole look like in s-plane???and what will be it's effect in bode plot .....i think it will still make gain plot fall by 20db / decade but now the phase will change due to +ve sigma which will cause exponentially rise in oscillations.

Re: right half pole

there are ways to make your system as stable... It will be helpful if u provide the transfer function of the system (with or with out feedback ?)..

right half pole

Well i have not calculated transfer function for this loop but analysing it thru SPICE and these are the poles and zeros i am getting in my system ......

poles (rad/sec) poles ( hertz)
*********************************************************************
real imag real imag
0. 0. 0. 0.
0. 0. 0. 0.
-1.83684e+03 0. -2.92342e+02 0.
-2.60709e+07 0. -4.14932e+06 0.
3.05546e+07 0. 4.86293e+06 0.
-8.80379e+07 0. -1.40116e+07 0.
-1.03597e+08 -3.67551e+08 -1.64879e+07 -5.84976e+07
-1.03597e+08 3.67551e+08 -1.64879e+07 5.84976e+07
-3.04510e+08 -7.40567e+08 -4.84643e+07 -1.17865e+08
-3.04510e+08 7.40567e+08 -4.84643e+07 1.17865e+08
-1.17585e+09 -1.93078e+09 -1.87143e+08 -3.07293e+08
-1.17585e+09 1.93078e+09 -1.87143e+08 3.07293e+08
-2.74577e+09 0. -4.37003e+08 0.
-3.09603e+09 0. -4.92749e+08 0.
-3.86372e+09 0. -6.14930e+08 0.
-4.10344e+09 0. -6.53084e+08 0.
zeros (rad/sec) zeros ( hertz)
*********************************************************************
real imag real imag
0. 0. 0. 0.
0. 0. 0. 0.
-2.67437e+07 0. -4.25640e+06 0.
-3.23228e+07 0. -5.14434e+06 0.
-1.43831e+08 -5.11581e+08 -2.28915e+07 -8.14206e+07
-1.43831e+08 5.11581e+08 -2.28915e+07 8.14206e+07
-2.60867e+09 4.95215e+08 -4.15183e+08 7.88159e+07
-2.60867e+09 -4.95215e+08 -4.15183e+08 -7.88159e+07
-2.66470e+09 3.37557e+09 -4.24101e+08 5.37239e+08
-2.66470e+09 -3.37557e+09 -4.24101e+08 -5.37239e+08
-2.69104e+09 0. -4.28292e+08 0.
-2.93114e+09 0. -4.66506e+08 0.
-4.40299e+09 0. -7.00758e+08 0.
-5.74251e+09 0. -9.13949e+08 0.
-9.31536e+09 0. -1.48258e+09 0.
4.32713e+10 0. 6.88685e+09 0.