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Yifeng Tang

MathWorks

Last seen: 2 dagar ago |  Active since 2020

Followers: 8   Following: 0

Programming Languages:
Python, MATLAB, Fortran
Spoken Languages:
English, Chinese
Pronouns:
He/him
Professional Interests:
Physical Modeling, Simscape Fluids, Simscape, Heat and Mass Transfer, Thermodynamics and Heat Transfer

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  • 12 Month Streak
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Answered
What is my fault to this modelling? I want to move the model but I am not able to solve the faults.
Follow the instructions in the error message. Use the Simulink-PS Converter to provide derivatives. The time constant will c...

2 dagar ago | 0

Answered
Modelling the sublimation of dry ice
Hi @Kyle, Interesting problem. I would approach it from the angle of convervation of energy and mass. Assuming the dry ice st...

2 dagar ago | 1

Answered
How to model a piston with a retracting spring at one end and having single hydraulic port??
Something like this should work. It's important to pay attention to a few things when setting up this model: (1) area of the...

2 dagar ago | 0

Answered
Implementing Process Control for Heat Exchanger Networks in MATLAB
For the physical plant, for instances heat exchangers, pipes, valves, pumps, etc., I suggest that you look into Simscape and Sim...

2 dagar ago | 0

Answered
Lead screw driven by a revolute joint in Simscape Multibody: How can I set a slider displacement to be proportional to the revolute joint angle?
Hi @mhaz, I think it would make more sense to move the revolute joint to be in series with the prismatic joint. See below. ...

4 dagar ago | 0

Answered
How to measure torque and rpm of compressor in refrigeration cycle?
Use a Ideal Torque Sensor, connect it in series with the compressor R port, and now you are measuring the shaft torque. Multipl...

ungefär en månad ago | 0

Answered
How to plot coefficient of performance(COP) of refrigerationcyclemodelexample?
For an air conditioning system, the COP is defined as the ratio between the cooling power and the compressor work. There are tw...

ungefär en månad ago | 0

Answered
MATLAB Projects for Mechanical Engineers
Hi Saurav, A few things to check out on fileexchange: Ivan Liebgott (2024). Modeling and Simulation of Multi-Physics Systems w...

ungefär 2 månader ago | 0

Answered
Network coupler for gas
Network coupler for Gas or Moist Air domain doesn't exist as of R2024b. I see two options: (1) follow the structure of such co...

ungefär 2 månader ago | 0

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Answered
How are centrifugal pump(TL) outlet flow rate and actual brake power calculated with pump nominal parameters?
In the equation for the reference capacity: , the first term on the RHS is the volumetric flow rate. If you move that term t...

ungefär 2 månader ago | 0

| accepted

Answered
I don' know why simulink parameter estimation failed. Please help me
Looks like the error message is trying to tell you that the Parameter Estimater cannot change the parameters it tries to estimat...

ungefär 2 månader ago | 1

| accepted

Answered
How can I determine the distance at which a moving frame slides over a fixed frame, knowing that I use a prismatic joint between these two frames?
You can set limits in the prismatic joint. It'll apply an additonal spring & damper once the limit is reached and try to stop t...

2 månader ago | 0

Answered
How to change the type of step for a Simulink Solver from variable to fixed in the Electric Vehicle Thermal Management model in Simulink?
When trying to run a complex Simscape in fixed-step, it is almost always recommended to use an implicit solver, as the equations...

2 månader ago | 0

Answered
How to change a simscape block parameter from MATLAB app?
modelname = "myModel"; % CHANGE THIS refrigerant = "R134a"; % CHANGE THIS. % You may use any of the following refrigerant n...

2 månader ago | 0

Answered
How to obtain 4th order transfer function in simulink
This example from the System Identification Toolbox should address what you need. https://www.mathworks.com/help/ident/ug/estim...

2 månader ago | 0

Answered
How to visualize a multibody model when running on a Speedgoat
Hi @f wang, If I understand it correctly, you are trying to visualize the 3D movements of the parts, is that right? If so, the...

2 månader ago | 0

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Answered
Is there a way to add a graphical only line between two frames in multibody
Hi Mark, I don't think there is a "native" way to do this. I can think of a clunky way of doing this. I don't like it but may...

2 månader ago | 0

Answered
Determining the Nominal mass flow rate
Hello, First of all, make sure you follow the workflow example in the documentation when modeling a refrigeration system: https...

2 månader ago | 0

Answered
Exporting Simscape model from R2024a to R2021a and R2023a
The message you got is a warning, not an error, which is trying to tell you to be very careful with the resulting model. Whethe...

2 månader ago | 0

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Answered
How to convert constants in parameters to variables in inputs in simscape？Invalid use of value 'density'.
Below is a summary of the discussion in the comments section: It is not possible to use an input to assign a domain parameter. ...

3 månader ago | 1

Answered
in simscape fluids, I want to use the gas-charged accumulator, which is a single phase component, in a 2 phase loop. How can I use it?
Try something like this: Use Translational Mechanical Converter for each domain, connect the R port, and add a small mass. R...

3 månader ago | 0

Answered
I wanna make 2D compressible fluid simulation when off gas ventilation at battery thermal runaway
Just a suggestion ... Right now, you have Neumann type of boundary condition for your normal velocity at the right boundary, na...

3 månader ago | 0

Answered
How to connect a 6 DoF joint to a moving center of mass (by creating a moving frame) in Simscape Multibody
Summarizd from comments: (1) leave the 6DOF untouched (2) use the measured CG location to drive a cartesian joint to the new C...

3 månader ago | 1

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Answered
How to change size of simscape multibody models
Hi @Ting, I just multiplied most of the dimensions in the subsystem mask by 10, and the model seems to assemble OK. See below....

3 månader ago | 1

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Answered
How to model marine exhaust system using Simscape.
Hi @Jonathan Thanks for sharing the picture. That helps. Whether MathWorks tools, in particular Simscape, can help model this...

3 månader ago | 1

Answered
Simscape parameter estimate using App
Hi @ENRICO, I echo much of your concerns and observations in the comments! Parameter estimator is a tool to find a minimum by ...

3 månader ago | 0

Answered
Is it possible to make Machine Learning model to predict multiple outputs with Statistics and Machine Learning Toolbox?
Using Regression Learner App, you can build a regression model for EACH of the outputs. That is to say you need to build TWO mo...

3 månader ago | 0

| accepted

Answered
Reference data source for Simulink Data center cooling example's default values
The example is to demonstrate a "reasonably sized" data center cooling system, instead of any specific data center. Lots of t...

3 månader ago | 2

| accepted

Answered
Modelling a 2p-2p Plate Heat Exchanger
The best alternative is the System-Level Heat Exchanger (2P-2P) block. The nominal condition should be quite easy to set up, bu...

4 månader ago | 0

Answered
Gas-Isothermal Liquid Model is not working
The model architecture is OK but some parameters need some efforts. I attached a modified model and it seems to run OK. The ma...

4 månader ago | 1

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