# J Chen

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**Content Feed**

Finding pitch, yaw for a delta three wheeler using simscape or vehicle dynamics blockset

The Vehicle Body block only describes vehicle longitudial dynamics. You need a block that handle lateral dynamics to get roll an...

14 days ago | 0

how to change simulink matlab (bellow) to code matlab? How do I enter the initial value?

https://www.mathworks.com/help/matlab/ref/ode45.html

14 days ago | 0

elevator motor modelling code

You need to model the system with a differential equation: . Solve the equation with MATLAB or Simulink for given N(t).

14 days ago | 0

Contact Forces/Torques for Robotics Applications

The Spatial Contact Force Block will automatically apply the forces to the elements connected to its two ports. You don't need t...

2 months ago | 0

3D matrix with equation

does mean ? You can calculate the result using three loops on i, j, and l.

2 months ago | 0

How to interpolate when we have two different sizes

temps_B and B have different size. They need to be the same size.

2 months ago | 0

Question

Separate Simulink block name into several lines

How can I separate the name of a Simulink block into serveral lines in R2020b? The Retuen key doesn't seem to work in this new r...

3 months ago | 1 answer | 0

### 1

answerHow can I get the value by choosing 't' and 'x'? ,How should I set the graph range?

Move the plot command outside the loop. Store the calculation at each time step in a buffer. For example: hist = nan(n,length(t...

3 months ago | 0

Log simulink (variable step) data with with one sample time!

Uee the To Workspace block in the Simulink Sink category and specify the Sample time in the block parameters.

3 months ago | 1

Question

Dispaly numbers in Simscape Mechanics Explorer or Simulink 3D animation viewer

How can I dispaly numbers in a Simscape Mechanics Explorer? The numbers need to be displayed in the Mechanics Explorer in order ...

3 months ago | 0 answers | 0

### 0

answersI can't plot this 3D matrix despite looking at other examples

The matrix has 3 independent variables. 3D plots using surf can only have 2 independent variable. You need to general 4 3D figur...

3 months ago | 0

If loop with character and two conditions

Use strcmp(t_adf_fdiff.reject,t_kpss_fdiff.reject) insteafd of t_adf_fdiff.reject == t_kpss_fdiff.reject. The two if statemen...

4 months ago | 0

How can I print the heatmap as grayscale?

heatmap(A) colormap(gray)

4 months ago | 1

| accepted

solving equations with trigonometric functions

format long % show more digits double(S1.theta3) double(S1.theta4) format % back to the default format

4 months ago | 0

How can I apply the same force on multiple objects in Simscape Mulitbody?

The problem is not with the force block. The problem is caused by incorrect configuration of the components, i.e., the component...

4 months ago | 0

Question

Split Simulink 3D viewer into multiple panes

Is it possible to split the Simulink 3D Viewer into multiple panes? I can split the display pane of the 3D World Editor into mul...

4 months ago | 0 answers | 0

### 0

answersQuestion

How to add a ROUTE node in the 3D world?

How can I add a ROUTE node in the 3D world as hilighted in the screen shot? Thanks.

4 months ago | 0 answers | 0

### 0

answersI have a . Mat file of battery model how can i create simulink model from it

Mat file contain variables and their values. You can load it to the workspace. The file most likely contains test data. You need...

5 months ago | 0

| accepted

Unable to find base block in simscape multibody

What do you mean by Base Block? You can find a World Frame block in the Frames and Transforms sub-category. The "Base Block" may...

5 months ago | 0

How can i obtain the final value of x and y?

Use sol = solve(prob) to solve the problem. The answer is in the sol object. You can also use sol.x and sol.y. Note that you may...

5 months ago | 0

| accepted

White background from "Print to Figure" in Simulink scope

I found that the background color is same as the scope for the figure generated from the "Print to Figure" command in the scope ...

6 months ago | 0

| accepted

Question

White background from "Print to Figure" in Simulink scope

The "Print to Figure" menu command in a Simulink scope generates a figure with a black background. How can I change the backgrou...

6 months ago | 1 answer | 0

### 1

answerReplacing a for loop with matrix multiplication

Try x'*inv(SIG)*x. Matlab can directly handle vectors and matrices.

6 months ago | 0

How do I store data that meet conditions of an if statement

You over wrote the variable data. One soluation is to change data to data(i).

6 months ago | 0

Impedance versus frequency plot in Simscape Simulink

Bode plot is the gain and phase of the impedance. Gain is the magnitude. Phase is the angle. You can use the magnitude and angle...

6 months ago | 0

Question

Simulink Pixhawk Support Package System Requirements

What is the MINIMUM system requirement to generate code from Simulink and download to a Pixhwak in R2020b? Will I be able to jus...

6 months ago | 2 answers | 0

### 2

answersSubmitted

Euler angles to axis-angle vector conversion for Simulink 3D

Calculate the corresponding axis-angle vector for given Euler angles

7 months ago | 2 downloads |

How can I convert a double variable to uint8 and convert it back to double?

Very interesting. In R2019b, I got >> d = 163.0 d = 163 >> d == double(uint8(d)) ans = logical 1 >> d == (uint8(...

7 months ago | 0