Fangjun Jiang

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2,839 total contributions since 2011

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Professional Interests: Model-Based Development

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Answered
Assigning Dynamic Variables in Simulink
Put the code in Model Properties, Callbacks, InitFcn. It will be executed every time the simulation is run. MyData=input() MyD...

19 hours ago | 0

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How can I create a random input similar to "band-limited white noise", but in an m-file in an ODE to solve with ode45?
rand()

20 hours ago | 0

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Limit a vector value
>> min([1 2 3],[2 0 5]) ans = 1 0 3 also see max()

3 days ago | 0

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Incorrect use of '='
use "==" for equal compare. It is in the error message.

4 days ago | 0

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EVALIN cannot execute a return?
It seems that "return" was not executed in the "caller" workspace as it is supposed to by evalin(). But would a "regular" appro...

4 days ago | 0

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How to repeat different vectors to form another vector?
repmat()

4 days ago | 0

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I cannot use the Fixed-point Tool when using dual-port RAMs in my design - strange bug
Internal "Idx1" traces back to input port "rd_addr". The error is complaining that the "rd_addr" can't be negative. In your mode...

4 days ago | 0

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Changing the number of bits for a value
help fixdt

5 days ago | 0

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Indexing n-th element with increasing offset.
%% a=1:13; b=cumsum(a); X=zeros(1,100); X(b)=1

5 days ago | 0

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How do I offset a vector plot?
V = 5:2:17; index=5:9; figure plot(index,V(index))

5 days ago | 0

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Include of custom code in generated
Use this block? Model Header Block Model Source Block

5 days ago | 0

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Delete a block and close an unconnected line with Ground & Terminator
delete_block() delete_line() addterms()

5 days ago | 0

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Importing workspace variable to simulink?
Use "From Workspace" block. Assume your data is MyData=1:10, you need to make it a column vector and also provide a column vecto...

5 days ago | 0

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How to solve the discontinuity of MPC controller output？
Use a rate transition block or zero-order holder block to deal with different sample rate

5 days ago | 0

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Retrieving the first time an enabled subsystem is triggered in Simulink
Within your "Parachute drag" enabled subsystem, feeding a constant of 1 to an Integrator block will give you the time since the ...

6 days ago | 0

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Search by line name
set 'FindAll' to be 'On' to search for signal lines. For outports, you need to clarify whether it is Outport block or outports o...

6 days ago | 0

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Combining function handles into one function handle
>> a = @(x) x(1)^2+x(2)^2; b = @(x) x(3)^2-x(4)^2; >> a(1:4) ans = 5 >> b(1:4) ans = -7 >> c = @(x) [x(1)^2+x(2...

7 days ago | 0

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Simulink: Need to update variables used in simulink differential equation solver
Do you have the formula of the function? For example, if pe1(t)=sin(t), you just use the "Fcn" block, specify it as "sin(u)" and...

15 days ago | 0

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How to use double precision functions in a single precision code generated project?
It is not a matter of double or single. The supported data types for this block is "Supported data types: Fixed-point, integer (...

15 days ago | 0

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How to make a Simulink Parameter non-tunable to avoid the following error: Parameter 'InputPortWidth' of '' is non-tunable but refers to tunable variables (NUM_OF_FAULT_EVENTS (base workspace))
change the storage class to "auto".

15 days ago | 0

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How to combine cells from cell array with a loop
data{1}=magic(3); data{2}=rand(2,3); data{3}=ones(4,3); cell2mat(data.')

15 days ago | 0

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How to create a 5D matrix by repeating a 2D array?
A has 70*70 elements. The loop runs only 70 times. Anyway, look into repmat(), reshape(),repelem().

15 days ago | 0

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Restoring model operating point and resetting time
Utilize the "Initial State" and "States" in Configuration Parameters, Data Import/Export. Basically, log the "States" of one sim...

16 days ago | 0

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How to create a structure of time series at one time
It can be done but it would be tedious. I would suggest one of these Use "State Reader" and "State Writer" block in Simulink Si...

16 days ago | 0

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Simulink: Need help using simulation time as a variable in Simulink Calculations
Use the Clock block from Simulink Sources.

17 days ago | 0

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How to take a max of a value in a struct
One way to do this PropertyNames={'Name','Weight','Strength'}; Data={'Metal',100,100; 'Plastic',50,50; 'Paper',1...

18 days ago | 0

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Variable names in array2table when creating table, "duplicate variable names" error
No way to know what is in "master". But there is a duplicated name in 'parameters'. The name 'TimeofSootSpikeEnd_sec' appeared t...

18 days ago | 0

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Combination of rows of two different matrices
Feels non-ideal. Any better solution? >> C=A(:,1)+B(:,1)'; D=A(:,2)+B(:,2)'; reshape([C(:),D(:)],[],2) ans = -1.0000 -...

19 days ago | 1

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Can the integration method be changed for discrete PI controller block from motor control blockset?
A DiscreteIntegrator block has that option. You just have to change it yourself if it is available. Of course then you will be d...

19 days ago | 0

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Double Pendulum Simulation using Simulink
The best way for this is to use the Constant block. You can specify the value of the Constant block as "m1" where "m1" is the va...

19 days ago | 1