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Control system miscellaneous

  1. A linear time-invariant system describd by the state variable model
    X1̇ = -1
    0
    X1 + 0u = [ 1    2 ] X1
    X2̇0-2X21X2

    1. is completely controllable
    2. is not completely controllable
    3. is completely observable
    4. is not completely observable
    5. Both B and C options
Correct Option: E

The linear time-invariant system:

X1̇ = -1
0
X1 + 1u = [ 1    2 ] X1
X2̇1-2X20X2

A = -1
0
, B =
0
, C = [1   2]
1
-2
1

[B AB] =
0
0
= |B AB| = 0
1
-2

Hence not completely controllable
[CT ATCT] =
1
1
2
-4

[CT ATCT] ≠ 0
Hence observable.



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