matlab - Replacing three integrators with one

Question

I need to calculate a linear growth model (in simulink) with continuous-time signal, described as:

x’ = ax

with at least three different real parameters “a”.

I've managed to do it using three integrators as you can see in the image below:

I've been told that there is a way to do it using only one integrator, but I can't figure it out.

Answer 1

你可以给你的增益块一个向量，而不仅仅是一个标量。

您可以[1 0.8 1.2]为单个增益块使用增益（乘法模式设置为Element-wise），而不是将三个单独的增益块设置为1、0.8和1.2。