ctrb function and syms error

Question

Hyo jong Cho 2019-11-28

回答： Chidvi Modala 2019-12-31

sym에서 double(으)로 변환하는 중 다음 오류가 발생했습니다.

표현식을 double형 배열로 변환할 수 없습니다.

오류 발생: ctrb (line 33)

co(:,1:nu) = b;

The following error occurred while converting from sym to double:

Cannot convert expression to double-type array.

Error occurred: ctrb (line 33)

co(:1,1:nu) = b; --> how to solve this error?

Answer 1

Chidvi Modala 2019-12-31

Controllability matrix for a system is given by

Where A is nxn constant matrix and B is n by m constant matrix.

The error occurred because, In your script, you declared A and B matrix with variables as elements. ctrb function works for only constant matrices.