I'm trying to create a custom block in Simscape that convert energy from pressurized water into a torque. Here is my code :

omponent pelton_turbine % Ce composant calcule le couple généré par l'eau sur la turbine. % 🔹 Déclaration des ports nodes H = foundation.hydraulic.hydraulic; % Port hydraulique R = foundation.mechanical.rotational.rotational; % Port mécanique rotatif end % 🔹 Déclaration des paramètres parameters eta = {0.85, '1'}; % Rendement de la turbine rho = {1000, 'kg/m^3'}; % Densité de l'eau r = {0.5, 'm'}; % Rayon moyen de la roue g = {9.81, 'm/s^2'}; % Gravité end % 🔹 Déclaration des variables internes variables Q = {0, 'm^3/s'}; T = {0, 'N*m'}; % Couple généré H_head = {0, 'm'}; % Hauteur d'eau équivalente end branches % Débit hydraulique pris directement depuis le port H Q : H.q -> *; end

equations % Calcul de la hauteur d'eau (pression convertie en mètre de colonne d'eau) H_head == H.p/ (rho * g); % Calcul du couple généré par l'eau T == {eta * rho * Q * r * sqrt(H_head * 2 * g), 'N*m'}; % Transmission du couple à l’axe mécanique R.t == T; end end

My problem is that I have this error when I try to build my component :

Invalid use of a value with unit cm^3*kg/(m*s^2) when attempting to bind a unit. The value to which the unit is bound must not have an associated unit. • In pelton_turbine.pelton_turbine (line 36) eta = 0.8500 rho = {1000, 'kg/m^3'} Q = {[1x1 double], 'cm^3/s'} r = {0.5000, 'm'} H_head = {[1x1 double], 'm'} g = {9.8100, 'm/s^2'}

I don't get why the flow rate (Q) is in cm^3/s instead of m^3/s and I don't know how to change it. Do you have an idea ?

I tried using Chatgpt but all his advices seemed to be useless. Since Q is a throught varaible Ican't define his unit. I also tried changing the units in the Configuration Parameters in my .slx file (I changed cm^3/s into m^3/s for the flow rate) but it didn't have any effect on my .ssc file and I keep getting the error.

Thanks,

Nils