how to flip the inputs of an simulink block

Hi everyone

I have an integrator block, and I want to invert its inputs, so I explain

the first input is x the signal to be integrated (the top input)

the second input is y the initial condition (the bottom input)

I want that x became the bottom input and y the top input

thanks in advance

[stalin]

can u give me a example

[XAXRXTX]

for example the cross product block you have two inputs A & B and one output C C = AxB the question is

how to put the A letter in the place of B input ...

A in the Top and B in the bottom of the block

after the inversion of the inputs

B in the Top and A in the bottom of the block

without affectiong the output

[Andy L]

Does this need to be done based on a condition that is set during simulation?

Answer 1

[Andy L]

See the image below. A variable switches the input on the switch blocks - see switch for information on setting the input conditions. In this figure the input is switched by a constant but you could replace that to suit your needs (a signal generator for example).

So in this example whilst the switch variable is not greater than 0, input 1 is A, and 2 is B. When it is, these swap, A becoming the input to 2, and B becoming the input to 1.

[XAXRXTX]

thanks all for replying

I think you did'n understand the question, so I want this

[Star Strider]

The output differs only by sign if A and B are reversed, so simply negate the output if you want the inputs reversed.

Non-Simulink example:

A = randi(50, 1, 3);
B = randi(50, 1, 3);

CAB = cross(A,B);
CBA = cross(B,A);

[Andy L]

XAXRXTX,

Would my solution for switching the inputs not work for your scenario then?

[Star Strider]

You don’t need to switch the inputs. Just negate the result. It has the same effect.