Observer with State-Space Block

iqjavier · May 13, 2007

Hi! I am implementing an observer using a state-space block in simulink. I am following a design I saw and what they did was place A for A, [B L] for B, C was set to eye(5,5), D was all zero, and the C was placed outside to allow reading three of the state variables. It works... but I am not sure how the [B L] is the same as adding the L outside.

xnuke · May 14, 2007

Mathematically, it looks wrong.

I'm assuming a plant with matrices (A, B, C, 0)

Given the Luenberger full state estimator equation with n estimated states given by the state vector xe:
dxe/dt = Axe + Bu +L(y-Cxe)
The state estimator should be (A-LC, [B L], [C Inxn], 0) with input vector [u y]' and output vector [ye xe]'.

xnuke
"Live and act within the limit of your knowledge and keep expanding it to the limit of your life." Ayn Rand, Atlas Shrugged.
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

Observer with State-Space Block

iqjavier

Electrical

Recommended for you

xnuke

Electrical

Similar threads

Part and Inventory Search

Sponsor