Double derivative of a vector of variables in Simscape components.
조회 수: 1 (최근 30일)
이전 댓글 표시
I'm constructing a Simscape component (.ssc file) and I'm confused by the mechanics of declaring the double derivative of a variable, specifically the double derivative of a vector of variables.
Say I declare a variable as follows:
variables
eta = {zeros(4,1),'m'};
end
Now I wish to use the double derivative in my equations can I use a variation of:
equations
eta.der.der == %...
%or
der(eta.der) == %...
end
Or must I also declare a 'derivative variable' say d_eta and use that as a intermediate value?
variables
eta = {zeros(4,1),'m'};
d_eta = {zeros(4,1),'m/s'};
end
equations
eta.der == d_eta;
d_eta.der == %...
end
Thanks in advanced!
PS.
Is there documentation on the working of der([...]) or [...].der?
댓글 수: 0
답변 (1개)
J Chen
2019년 4월 23일
I would say you must use the second approach:
variables
eta = {zeros(4,1),'m'};
d_eta = {zeros(4,1),'m/s'};
end
equations
eta.der == d_eta;
d_eta.der == %...
end
댓글 수: 0
참고 항목
카테고리
Help Center 및 File Exchange에서 Equations에 대해 자세히 알아보기
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!