**comp.dsp How to calculate the time constant of a filter**

Matlab has a function called polyfit. It can fit curve to a data which can be represented in the form a*X^n+b*X^(n-1)+.....z. However if you are sure that the data is of some exponential decay you can try taking logarithm of the data first and then using the polyfit function.... Please how do i determine the closed loop time constant for a step response for a process plant with time delay. The simulation has been carried out using using Simulink, therefore I need a way to obtain the time constant of the closed loop.

**comp.dsp How to calculate the time constant of a filter**

I've come into ownership of a bunch of MATLAB code and have noticed a bunch of "magic numbers" scattered about the code. Typically, I like to make those constants in languages like C, Ruby, PHP, etc.... Matlab has a function called polyfit. It can fit curve to a data which can be represented in the form a*X^n+b*X^(n-1)+.....z. However if you are sure that the data is of some exponential decay you can try taking logarithm of the data first and then using the polyfit function.

**How can I determine the constant time (time to MATLAB**

I have been given two vectors, x and y, and I need to find the time constant for these data points. I graphed the data using "plot(x,y) I basically need to find the value of x for a given value of y. how to fix a rt wwe2k17 Matlab has a function called polyfit. It can fit curve to a data which can be represented in the form a*X^n+b*X^(n-1)+.....z. However if you are sure that the data is of some exponential decay you can try taking logarithm of the data first and then using the polyfit function.

**Get the time constant from a nonlinear system of ode**

This example shows how to display system characteristics such as settling time and overshoot on step response plots. You can use similar procedures to display system characteristics on impulse response plots or initial value response plots, such as peak response or settling time. how to find vic historic rego You can get the time to react to the step as the time from 0 to when either the function (or the derivative of the function) increases beyond about 5 or some other threshold value. You can compare that to the driving function step time to see the lag in the reaction time of your system.

## How long can it take?

### Calculation of dead time and time constant for non linear

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## How To Find Time Constant In Matlab

1) Use simple (linearized and compensated) model of a motor to get its transfer function, thus you will be able to find and compensate its "big" time constant; 2) manualy, first put I=0 and vary P

- To calculate this, we need to modify our “Universal time constant formula.” The original formula looks like this: However, we want to solve for time, not the amount of change. To do this, we algebraically manipulate the formula so that time is all by itself on one side of the equal sign, with all the rest on the other side: The ln designation just to the right of the time constant term is
- If instead you have a constant value that needs to be computed, you can store it in the M-file in a persistent variable and only calculate it the first time the function gets called. This is essentially the way pi works in MATLAB except its value is computed once at startup time and then is available throughout your MATLAB session.
- 19/02/2013 · Hi, I have a low-pass fillter in the following form: x_k = alpha * x_{k-1} + (1-alpha) * y_k where x_k is the average value I try to update, and y_k is the new value that occurs at time k.
- Now, let’s write a Matlab Code to calculate voltage across capacitor for different resistance values. You May Also Read: RL Circuit Time Constant Matlab Code to calculate voltage across capacitor