Community Profile

photo

Sam Chak


Last seen: Today |  2020 年からアクティブ

統計

  • Guiding Light
  • 12 Month Streak
  • Thankful Level 1
  • Knowledgeable Level 5
  • Revival Level 1
  • First Answer

バッジを表示

Content Feed

表示方法

回答済み
How to model PI flow control with throttling (butterfly) valve in hydraulic centriful pump Simscape/Simulink model?
Hi @DB Due to the static nonlinearity of the valve characteristics, it is possible to find an inverse function for the valve in...

約22時間 前 | 0

回答済み
Solving a differential equation using ode45
Hi @GOBIND KUMAR, The code for the ode45 part can run. No issue with that. So, I think the problem lies in the computation of ...

3日 前 | 0

回答済み
Why Fuzzy logic Designer unable to open the Fis File?
Hi @Yara Physically check if the mamdanitype-01.fis is still there in the target folder. Check if the contents in the mamdani...

3日 前 | 0

回答済み
Derivative of state '1' in block ' 1/s Integrator' at time 42.104565484973058 is not finite
Hi @Yingxin Zhang Without a set of mathematical model to compare with the Simulink model, it is rather difficult to identify th...

3日 前 | 0

回答済み
Fuzzy Logic Toolbox - addRule throws "Do not use a rule keyword as a membership function name" error
Hi @tulu There are several typos. If you make the code less 'cluttered', you can spot the mistakes easily. The code is now is f...

5日 前 | 1

回答済み
simulation of a levitating object
Hi @Andeol Gillet Generally, you can follow these 3-D's steps to design the controller for a Maglev system: Derive the mathema...

6日 前 | 0

回答済み
tf and damp, all need the numerical coefficients of the transfer function
Hi @li hu Finding the poles (roots of the denominator) is like solving polynomial equations. However, if it is 5th-degree and ...

6日 前 | 0

回答済み
What is the best objective function to avoid the overshot when optimizing a PID controller?
Hi @aymene bacha First of all, you need to understand what causes the overshoot in the system, and what does not. Do you have ...

13日 前 | 1

回答済み
How can we represent this transfer function into state space representation in MATLAB?
Hi @Hind Aljallaf As far as I know, there is no MATLAB command in the Control System Toolbox for directly computing the control...

17日 前 | 0

回答済み
I get error when I try to plot sigmoid function
Hi @cindyawati cindyawati A pure sigmoidal logistic function looks like this x = linspace(-10, 10, 20001); S = 1./(1 + exp(...

18日 前 | 1

回答済み
how to right math functions
Hi @Abdulelah AlQahtani For simplicity, the signal can be defined like this. t = linspace(-5, 10, 15001); u1 = 0*(t <= 0); ...

19日 前 | 0

回答済み
How to use MATLAB's lqi.m function?
Hi @Craig Chambers I'm unfamiliar with you system. So, I tested with the LQR first. It seems that a properly scaled step inpu...

19日 前 | 0

回答済み
ODE45 to solve multiple degree of system free vibration
Hi @Karolina Kugiel ode45 solves the problem by integrating where . So I guess you looking for states . m1=10; m2=10; m3=10; ...

21日 前 | 0

回答済み
How to find kp ki values by having pm and gcf in matlab ?
Hi @Basava I guess you are not looking for the analytical formulas for and because you asked in this forum. So, when the pha...

22日 前 | 0

回答済み
Include a new condition to solve a system using ODE45
Hi @Mikel You can try the two approaches in the code. However, the step value should not exceed fs = 130, or else your designe...

24日 前 | 0

回答済み
Optimisation PID Using Sliding mode script
Hi @Tarek I don't think that SMC can optimize the PID gains. The structure of SMC is not an optimization algorithm. Before op...

26日 前 | 0

回答済み
Positive definite and LQR
Hi @Scott Not exactly sure what you want. But I think there is no absolute rule saying that the state-cost weighted matrix has ...

約1ヶ月 前 | 0

回答済み
Write code and driver MR damper
Hi @kerollos The code can run now. However, you have to review the initial values and define for . The system looks unstable. ...

約1ヶ月 前 | 0

回答済み
how to use the anfis command
Hi @Alessio Centamore I think the syntax is for old anfis() input arguments. OutputFismat = anfis(dati_all, FisMatrix, [40 nan...

約1ヶ月 前 | 0

回答済み
Why is the output u always 0.166instead of 0 when my input e and es are both 0
Hi @罗雪峰 罗 The reason is because output 0.166 is computed from the Center of Area (CoA) defuzzification method. During the initi...

約1ヶ月 前 | 1

| 採用済み

回答済み
How do I use a root locus to find a value of K such that the damping ratio of dominant closed loop poles is a specified value?
Hi @Thomas and @Luke McDevitt The steps are generally described in the following documentation, as well as in most undergrad co...

約1ヶ月 前 | 0

回答済み
Obtaining MIMO kinematic model (+ controller) using data-driven approaches
Hi @mgf_04 This sounds like a system identification problem. If you have the System Identification Toolbox™ installed, then try...

約1ヶ月 前 | 0

回答済み
how to sine wave plot
Hi @Raouf You can scroll down and find one example that is related to plotting a sine wave. 😉 help fplot

約1ヶ月 前 | 0

回答済み
Derivative of state '1' in block 'PP_poly/Integrator1' at time 0.0 is not finite.
Hi @Dogukan It's good to hear that your problem is solved now. I moved my comment to the Answer section because it helped you t...

約1ヶ月 前 | 0

回答済み
Track a circular trajectory by solving a QP and using quadprog solver (using CLF approach)
Hi @Pallov Anand Sufficiently increasing the value of alpha reduces the tracking error between the x-y trajectory and the desi...

約1ヶ月 前 | 0

回答済み
Сan not identify block
Hello @Anton It is possible to create the block using "block mask" techniques. However, I think the authors probably (and simpl...

約1ヶ月 前 | 1

| 採用済み

回答済み
Error when simulating an adaptive control system with an inverse reference model: Derivative is not finite.
Hi @Anton There is no obvious division-by-zero component. So, the system must be unstable, which causes the output to grow out ...

約1ヶ月 前 | 2

| 採用済み

回答済み
Control vehicles velocity according to speed signs
@Purvil Patel, Here is th basic idea. Even though some speed limit signs maybe out of the sensor's range, the controller should...

約1ヶ月 前 | 0

回答済み
Plot the function sin (x) on the interval [0, 5]. Now generate the discrete time signal from the sine function with 6 discrete values. Using this fundamental period, generate
Hi @Woods, follow this example. fcn = @(x) 2*x - x.*abs(x); fplot(fcn, [-1 1]) grid on title({'Plot of $y = 2 x - x |x|$ ove...

約1ヶ月 前 | 0

回答済み
Solving coupled differential equations
Hi @Jon I'm unsure if the system has a general analytical solution. In Pure Math, from the properties of a stable 2nd-order OD...

約1ヶ月 前 | 0

さらに読み込む