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richard


Last seen: 4 days ago |  Active since 2014

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Professional Interests: Kalman filtering

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Global variables in simulink - embedded coder
Using the C2000 blockset with an F28379D. I have a subsystem block that I call with an interrupt (an ADC block). --> What ...

8 months ago | 1 answer | 0

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Question


C2000: Viewing variables in Simulink and Embedded Coder
I am using Simulink + Embedded Coder to generate test code for the F28379D processor (one of the targets in the C2000 toolbox). ...

8 months ago | 1 answer | 0

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Question


Switching frequency stability and ripple reduction in a boost converter
I am simulating a high voltage boost converter (270Vdc -> 500Vdc) that is feeding a constant power load (several kilowatts), and...

1 year ago | 1 answer | 0

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Question


Scope in Simulink - how to "grab" and "drag" cursors
Basic question here: When I view the scope plot after running a simulation in Simulink, I can "add" the cursors to the plot for...

1 year ago | 1 answer | 0

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Question


Declaring a matrix with null dimension, or checking if a matrix exists
Inside a for loop, I want to do a calculation that produces new results, and then append these results to an existing matrix c...

1 year ago | 1 answer | 0

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Answered
How to get output results when using the lqr command in matlab
The dlqr command worked - thank you! Also, I have researched that although my system is not "controllable" (controllability m...

1 year ago | 1

Question


The Koopman operator and lifting functions using radial basis functions - cconceptual question
This is a conceptual question on how to apply a radial basis function as a lifting function to approximate the Koopman operator....

1 year ago | 1 answer | 0

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Question


How to get output results when using the lqr command in matlab
I have a linear system where A is 3 x 3 and B is 3 x 1. Ak = 1 6.7514e-15 -2.6163e-15 ...

1 year ago | 2 answers | 0

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answers

Question


LQR Q and R matrices for a DC boost converter
A question on the theory behind the LQR controller with a boost converter. In "conventional" PI control for a boost converter, ...

1 year ago | 1 answer | 0

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Question


Using LQR with external disturbance vector
I am going through Matlab tutorials on modeling an A and B matrix for a linearized boost converter, and then using the Matlab ...

1 year ago | 1 answer | 0

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Question


Error when using the placelabels function - Unrecognized function or variable
I'm trying to use the placelabels function with my plotting here (I inherited this code, shown below). I get the error "placela...

1 year ago | 1 answer | 0

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Question


Using a persistent array in a Simulink function block
I have a Simulink block that takes inputs, and remembers past inputs, in order to generate its outputs. Sometimes, the buffer t...

1 year ago | 1 answer | 0

1

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Question


Stop autoscaling when using the simulation data inspector
I am using the simulation data inspector to plot up to 10 waveforms of a simulink simulation. Sometimes, I want to manually zoo...

2 years ago | 1 answer | 0

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Question


Running simulink model with multiple values of a parameter, and then plotting multiple results on the same plot
I have a simulink model (a DC-DC boost converter) that I can run, where there is a parameter called "Beta" that affects the step...

2 years ago | 1 answer | 0

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Question


DC-DC converters: differences between a resistive load vs a CPL, and the "unknown load" case
Conceptual question here: let's assume a simple DC-DC boost converter, with an inner current control loop, and an outer voltage ...

2 years ago | 1 answer | 0

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Question


Solving a PDE symbolically
Greetings! Background: I'm studying "Interconnection and damping assignmemnt passivity based control" (abbreviated as "IDA-PBC"...

2 years ago | 1 answer | 0

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Question


Factoring out a smaller equation, using symbolic math, from a larger equation
Greetings All! Symbolic math is giving me an output here: u_Version2 = Vin - L*dx1d - rL*x1d - L^2*kR1*x1d + L^2*kR1*...

2 years ago | 1 answer | 0

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Question


Substitution with systems of partial differential equations (algebraic)
Regarding systems of partial differential equations, and the substitution function. Let's say I have the following equations: ...

10 years ago | 0 answers | 0

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Question


Switching mosfets in boost rectifier using Simulink
I am simulating a full bridge (four switch) boost converter in Simulink. The gate of each mosfet is connected to a logic block ...

10 years ago | 1 answer | 0

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Question


Time steps for random generator in simulink
I am using a repeating sequence to generate a triangle wave for PWM in Simulink. In specifying the time values for the repe...

10 years ago | 1 answer | 0

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