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How to convert Simscape (Hydraulic) blocks to discrete time to reduce computational time?
My model currently has a high computation time because half of it is using continueous time hydraulic blocks from the Simscape H...

10 mois il y a | 1 réponse | 0

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Question

What is an efficient way to do PID tuning in a model with long computing time?
I'm modeling PID control of a variable frequency drive (VFD) on a centrifugal pump system in Simulink/Simscape. As I want the sy...

10 mois il y a | 2 réponses | 0

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Question

How to model PI flow control with throttling (butterfly) valve in hydraulic centriful pump Simscape/Simulink model?
I want to model PI-controlled butterfly throttling valve to control the flow. The control variable is an early flow measurement....

11 mois il y a | 1 réponse | 0

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A répondu
Simscape - hydraulic flow control valve
Hi, it's been some time, but have you solved it? I would suggest using the orifice block, which also has a variable opening opti...

11 mois il y a | 0

Question

How to plot pump and system curve based on the hydraulic model in Simscape / Simulink?
I have modeled a centrifugal pump system with frictionous pipes and a control valve. I want to plot the system curve to see wher...

11 mois il y a | 1 réponse | 0

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A répondu
How to set time domain Simscape model to hours instead of seconds?
It seems the notation for hours is hr, not h. Therefore, I can change the flowrate from m^3/s to m^3/hr and it works.

11 mois il y a | 0

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Question

How to set time domain Simscape model to hours instead of seconds?
For my hydraulic isothermic model I model a centrifugal pump installation. Normally, flows and pump capacity characteristics are...

11 mois il y a | 2 réponses | 0

2

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Question

In a Simscape Fluids/Hydraulic/IL centrifugal pump model, why is the flow higher after narrow pipe than directly after the pump?
I'm creating a centrifugal pump system where a fluid is pumped from one tank to another. See the first figure. The tanks have sm...

11 mois il y a | 1 réponse | 0

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Question

In Simscape: How to change runtime of simulation and how to change name of blocks?
1) I change the runtime from 1-1000, but the Results Explorer still just runs it for the default 10 seconds. How do I fix this? ...

12 mois il y a | 1 réponse | 0

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Question

How many iterations does a ODE solver like ode45 do? What do the dimension of outputs mean?
Say I have a state space function function dx = sys(t, x) A = [0 1; -2 3]; B = [0;1]; K = [-1 -1]; u = K*x; dx = ...

plus d'un an il y a | 1 réponse | 0

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Question

What do the (high) values in a controllability matrix mean?
In a linear state space system, I used the function Co = ctrb(A,B) To check the controllability of the system. I get a full ...

plus d'un an il y a | 1 réponse | 0

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Question

Function returns scalar independent of input, but I need a matrix output
I have function handle f: f = @(x)4.3206303272e-05.*x(1).^2+2.39837699915e-05.*x(2).^2 Where is a vector. I want to plot the...

environ 2 ans il y a | 1 réponse | 0

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Question

How to replace the sdpvar vector x with meshgrid variables to plot it? (YALMIP)
I have polynomial f of min degree 2, max degree 6 with variables x1 and x2, which are defined in Matlab by: x = sdpvar(2,1) Ac...

environ 2 ans il y a | 1 réponse | 0

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Question

Plotting a multivariate polynomial with sdpvar variables
Suppose I have a polynomial , with degree . I want to plot the function where each variable in runs from to . I saw that usin...

environ 2 ans il y a | 1 réponse | 0

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Question

How to have Matlab create a random matrix that is fullrow rank?
Say we have random matrix A, which we use for proving some theory, and we need this matrix to be fullrow rank, how to model this...

environ 2 ans il y a | 2 réponses | 0