Community Profile # J Chen

Last seen: 15 days ago Active since 2019

#### Statistics

All
• • • • • • • • • • • #### Content Feed

View by

How to measure output torque of a gear in simscape multibody?
Choose the Total Torque in the Composite Force/Torque Sensing tab.

27 days ago | 0

How to visualize movement that occurred by reaction force with Simscape multibody?
The grey cube should move if it is not fixed and connected to the arm through a revolute joint. The motion maybe too small for y...

27 days ago | 0

Cannot find "body" block on Simscape
No sure what is the Body block in R2017. You can find Mass and Inertia blocks in the Simscape Foundation Library - Mechanical - ...

27 days ago | 0

| accepted

Question

PID Tuner couldn't find a stabilizing controller
The PID block in the attached Simulink file stabilizes the plant (the plant is defined in the call back). However, the PID Tuner...

27 days ago | 0 answers | 0

### 0

How to rotate an image in Matlab
You basically read the image into a matrix, then change the array element to a different location (swich row to column, etc.)

2 months ago | 0

Clock on Mechanics Explorer Video
A simple solution is to do a screen recording that includes the Time display at the bottom of the Mechanics Explorer. Powerpoint...

2 months ago | 0

Automaticly change of actuation of joints in Simscape multibody.
Use name = gcb to get block names (select a block first) Use get_param(name,'DialogParameters') to get parameter names. The par...

2 months ago | 1

| accepted

Finding natural frequency and mode shape of damped 4 degree of freedom
Use F=ma to develop the differntial equations for m1, m2. Use F=ma and M=Iw for m3. The natural frequencies and mode shapes are ...

2 months ago | 0

Design a Transmission Shift Controller
Use a MATLAB Function block in SImulink. You can put the logic in the block. Persist variables could be useful (link).

3 months ago | 0

How do i add a drive cycle in simscape to a genric engine.
You need a controller that compare the desired and measured speeds to generate the throttle command. This is not a trivial task....

3 months ago | 0

How to find pressure at every section of pipes in series in simscape? One end of pipe is connected to a constant pressure source and another end is open to the atmosphere
Use the Hydraulic Pressure Sensor block in the Simscape Fundation Library - Hydraulic.

3 months ago | 0

To get the G port: open the Spherical Solid block. Expand the Export under the Geometry and check the Entire Geometry box.

3 months ago | 0

| accepted

Multiple Joints on flexible parts in Simscape Multibody
You can add new frames to the body elements. The new frames will have new associated ports. You can apply the forces at these po...

4 months ago | 0

Is it a reliable number when pid tuning is performed using simscape multibody?
The Simulink PID block correctly implement a PID control. You specify the gains in the block dialog box.

4 months ago | 0

Moment of inertia with coordinates
Moment of inertia is or , where m is the mass, r is the distance to the rotation axis.

4 months ago | 0

Is there another way to increase the mass flow rate on simscape?
You need to understand the physics. Flow rate and pressure are related. The pressure in a volume is determined by in and out flo...

5 months ago | 0

| accepted

How to draw a Motor efficiency map having speed, torque and efficiency?
Use contour(x,y,z), where x, y need to be in grid corrdinate. You can study the following example for the grid coordinate x = 1...

5 months ago | 0

Combining Simscape-Simulink Matlab versions 2018 and 2021
Replace the hard stop block with the hard stop block in the 2021a Simulink Library Browser.

5 months ago | 0

| accepted

Connection between current measurement and sum block

5 months ago | 0

Simscape Multibody, Transform Sensor, quaternion output
Take a look at this: https://www.mathworks.com/matlabcentral/answers/415936-angle-between-2-quaternions

6 months ago | 0

Would it be possible to change the greyscale to a blue scale?
Take a look at the colormap command - https://www.mathworks.com/help/matlab/ref/colormap.html

6 months ago | 0

The following code is not giving errors, but it does not solve the system of equations.
In order to solve a system of equations, the number of equations needs to equal the number of variables. You also need ==0 for t...

7 months ago | 0

Solving a system of three second order coupled differential equation
Use as states and express the derivatives of the states as functions of the states, e.g., d/dt()=etc.

7 months ago | 0

Solving ODE with sqrt
If you know how to solve an ODE in Matab, the problem might be negative values for the sqrt().

9 months ago | 0

how to get eigenvalues and plot it
Use a loop to calculate and store the eigenvalues for each time point. Plot the data outside the loop.

9 months ago | 0

| accepted

Does Simscape Multibody enable torsion system modeling consisting of 2 or 3 rotating masses / inertias connected by spring and damper elements?
Connect the inertias with revolute joints and specify the spring stiffness and damping coeficient in the joint parameters.

9 months ago | 0

Singularity error encountered when calculating inverse dynamics of a elastic joint.
Probably better to specify the desired angle at the output port (F port) of the Torsional elastiticity & damping block. You can ...

10 months ago | 0

Heatmap - how to get the plotted colors
camp = colormap https://www.mathworks.com/help/matlab/ref/colormap.html

10 months ago | 0