about setting setBlockParameter (blkParam, paramVal)

I have a qusestion about setting setBlockParameter.

In example,

blkParam is 'Gain' and 'Position'.

Question for here.

1. Are these 'Gain' and 'Position' is designated text arrays in Metlab?
2. Can't I set it to my own text I want?

plus

In example.

paramVal is '40'

Question for here.

3. I want to change value '40' to 1x4 maxtrix [1 0 0 0], how can i change the value?

Answer 1

[Paul]

A1. Gain and Position are block parameters. Position is a paramter that is common to all blocks. More info here Common Block Properties Gain is a block parameter unique to the Gain block. More info here Block-Specific Parameters.

A2. No, you can't change the names of those parameters, only their values.

A3.

simin = setBlockParameter(simin,'vdp/Mu','Gain','[1 0 0 0]');

Of course, you have to make sure that the model will still work with that value for Gain.

[기범]

Thank you for your apply.

I have one more question.

Im using quaternion division block,

1. I want to know blkParam for setting initial position.

[Paul]

This quaternion division block? I don't see anything in that block related to initial position. If another block, please provide link.

Generally speaking, you can use get_param to see the parameters for any block in your model.

[기범]

That the right one.

Thank you for providing get_param.

Thank you.

[기범]

Sorry for late question.

Im qurious about setting a new parameter on the subsystem.

Is that possible?

[Paul]

I don't think you can define a new parameter for any block. I could be wrong.

However, each block has a UserData property that may provide nearly that functionality. For example, you can make the UserData value a struct, and each field of the struct can represent a parameter and its value.

If you want to change the value of a block parameter, use set_param.

[기범]

In watertank model

(https://kr.mathworks.com/help/reinforcement-learning/ug/water-tank-reinforcement-learning-environment-model.html?searchHighlight=watertank&s_tid=srchtitle_watertank_3)

• blk = 'rlwatertank/Water-Tank System/H';
• in = setBlockParameter(in,blk,'InitialCondition',num2str(h));

I cannot find InitialCondition parameter in constant block.

But, the H is the constant block and setting some InitialCondition.

can you explain it?

And my purpose is want to set some intialValue for my quarternion Multiplication for my reinforment learning.

[기범]

oh I'm Sorry.

The H block was integrator block.

[Paul]

Sounds like you have it sorted out. Good luck with your project.