**tuning PID using Ziegler and Nichols**In simulink I have created this type of simple closed loop system:
Step ->(sum + - ) [PID] -> [Plant] -> Scope
^ |
| |
-------------------------------------
Where Plant is:
(IN1) -> [Transfer function] -> Time Delay -> Out1
1/T.s+1
G(s) = e^(-s)/Ts +1 (T - Time constant = 0.1)
^ = to the power of;
and I need to find Ki, Kd and Kp for the PID
Not certain for the Step parameters whether to neglect them for now or no...

**Tuning PID controlers Ziegler & Choen-Coon**To anyone help!!!
Problem using tuning tecnics of PID controlers at open loop to get parameters for P, PI and PID using transference function G(s) equals (2 e-2s)/((2s+1)(3s+1))
Thanks anyone
J.
...

**Simulink, PID controller problem, Controls !**Hello Matlab users,
I am a E.Eng major student and I have been using Matlab for my Control Systems class.
But recently I am having a big confussion in Matlab simulink That I cannot understand at all.
Here is my problem:
I have this open loop transfer function :
= 172.98/(s^2 +2.57s)
And I am supposed to find PID gain so that the system's setting time is =0.3sec.
Now By using Proportional and Drivative I came up with the answer of
Kp = 0.198
Kd = 0.077
Therefore, the PD controller transfer function will be = 0.077s + 0.198
WhenI plug that value into the PID controller with KI=0, it...

**PID control using Ziegler-Nichols Closed Loop Method**I need some help with my homework,
G(s) = e^(-s)/Ts + 1 where T is time constant = 0.1
I need to find Ki, Kp, Kd for my PID controller.
So far no luck in anycase, plz help I have no Idea of the alghoritm to solve this example
and I have over 40 similar problems to solve for less then a day :)
Thanks in advance
...

**Tuning PID parameters of DC motor speed control using Ziegler Nicholas method**Is it impossible to implement a dc motor speed control using closed loop ziegler nicholas method? For some transfer function I used ziegler nicholas method but I couldn't determine the PID parameters for DC motor speed control.Could you propose anything for this operation?
Thanks.
And my transfer fuction is;
1
-------------------------------------
s^2 + 14s + 40.02
I couldn't find the PID parameters using Ziegler-Nichols method(closed loop).
Where is my mistake?Could you propose anything???
Thanks.
Am I writing unreasonable things that are impossible...

**Tuning of PID CONTROLLER**This is to get some help on tuning of PID controller parameters in a linearized system model. Further the tuning has to be done by already established global optimization techniques based on evolutionary computation. How to communicate simulink model with m file in matlab. How algorithm will fetch the quality (cost) from simulink model.
The quality or cost is usually taken as ISE, ITAE like that....
Do help me..............
thanking you......
...

**PID controller tuning**Is there any one who can help me in tuning the PID controller block in simulink.I am totally unawre of the procedure.
Thanks in advance
On Apr 7, 2:16=A0pm, "Bindu " <bindu_l...@rediffmail.com> wrote:
> Is there any one who can help me in tuning the PID controller block in si=
mulink.I am totally unawre of the procedure.
> Thanks in advance
check here..
http://www.mathworks.com/products/simcontrol/
There is also a webinar on the subject:
http://www.mathworks.com/company/events/webinars/wbnr38619.html?id=3D38619&=
p1=3D636028070&p2=3D636028082
and...

**Tune PID controller?**Hi all.
I need to tune a PID controller with time constants
(period of the scillation) on the order of hours.
Any suggestion for procedures or algorithms?
Literature?
Rune
Rune Allnor wrote:
> Hi all.
>
> I need to tune a PID controller with time constants
> (period of the scillation) on the order of hours.
Do you have a model of the controlled plant or the PID has to be tuned
empirically?
> Any suggestion for procedures or algorithms?
> Literature?
PID is a basic thing, you will get zillion of references on google.
* The first that comes to mind are Ziegler and N...

**Simulink and PID controller**Hi,
We are developing a Cryogenic temperature controller with PID tuning, the system contains a Silicon diode Temperature sensor and a heater inside a cryostat. We need to develop the system using simulink , with PID tuning . It is a closed loop control system, we are using PID discreet controller for PID tuning , but for plant , we should develop a cryostat , this is were we are stuck, Pls give gives us your valuable suggestions in choosing a particular simulink toolbox for designing a Cryostat(which has a heater inside it with a temperature sensor) . Looking forward for positive and speed...

**Tuning of PID CONTROLLER #2**This is to get some help on tuning of PID controller parameters in a linearized system model. Further the tuning has to be done by already established global optimization techniques based on evolutionary computation. How to communicate simulink model with m file in matlab. How algorithm will fetch the quality (cost) from simulink model.
The quality or cost is usually taken as ISE, ITAE like that....
Do help me..............
thanking you......
...

**Control Theory PID tuning**I'm not sure if I've made a MATLAB mistake or maybe misunderstood something in the control theory. I was hoping to verify my MATLAB code
The following TF is a closed loop TF with unity feedback and PID values using Ziegler-Nichols (ZN) first method. I've not tuned the PID any further. I'm plotting this TF using step(TF, t) where t is time.
Transfer function of closed loop Plot with ZN PID values:
1.4 s^3 + 49.48 s^2 + 4.371 s
---------------------------------------------
0.005597 s^4 + 5.816 s^3 + 51.84 s^2 + 6.58 s
The plot is what I'd expect but the...

**PID controller block tuning**Any one is there who could help me in tune the PID controller block in simulink.I am totally unaware of the procedure how to start up tuning.
Thanks in advance
Check the answers to your first post with the same question.
"Bindu " <bindu_lal1@rediffmail.com> wrote in message <hpj64g$kq9$1@fred.mathworks.com>...
> Any one is there who could help me in tune the PID controller block in simulink.I am totally unaware of the procedure how to start up tuning.
> Thanks in advance
...

**Ziegler-Nichols Method in Simulink**How can I implement Ziegler-Nichols Method in Simulink?Could you propose any example?
...

**PID controller WITHOUT Simulink**Hello everybody,
I don't have the simulink toolbox but I need to simulate a process
with a PID controler. I am using the ode45 solver with a PID equation
discrete on time.
Does anybody know how to capture the value of an state at certain
predetermined times? For example, I have to know during the
integration the value of y(1) at time equal 0.2, 0.4, 0.6, etc. The
problem is that the integration steps varies during the integration
method and I can't use IF structures like:
IF ~ISEMPTY(t==[0.2 0.4 0.6 0.8]) THEM "CALCULATE DE PID EQUATION".
If I had the simulink I could use ...

**PID controller in Matlab/Simulink**Hello,
I wonder why PID block in Simulink Extras doesn't have Controller
bias parameter (i think someone calls it feedforward parameter)?
Is it possible to add it to simulation and not to be considered
disturbance by simulation?
...

**self-tuning PID controllers**I want help about self-tuning PID controllers parameter
estimation..how can i find example matlab files about this?
thank you
...

**Problem tuning PID for temperature control**Hope someone can help me with my my temperature control problem. I am using PID control to stabilize 12 heaters using PT100 sensors. The temperature seems to be very unstable no matter how I tune it. The temperature seems to hold at setpoint for a while (with +/- 2 C) and then shoots so high (up to 20 C) and then the heaters shut down to bring down the temperatures. All heaters are working at different temperature setting. The heaters are controoled using external SSR using the PWM method.I simply cant get the temperature to oscillate within +/- 1 C. Hardwares used: PXI1048, PXI 6602 (2 units)...

**how to build a PD or PID controller in simulink**Dear all,
I have a problem about PD simulink design,as illustrated,
Consider a simple system,
dot(x)=x-u (1)
u=p*x+d*dot(x) (2)
where x and u are one-order, u is control input with the parameters p
and d. dot indicates diff.
Substituting u=p*x+d*dot(x) into dot(x)=x-u, we obtain
dot(x)=(1-p)/(1+d)*x.
Obviously, only if p>1 and d>-1, the system (1) and (2) is
stable because of the negative (1-p)/(1+d).
However, with my built simulink block, the simulink result is always
unstable when p=2, d>=3!
Would you help me clarify this problem and build a proper simulink
block for me?
your ...

**PID Controller Simulation Discrepancies with Simulink**Hello, I am having an issue with simulink that I cannot solve.
I am trying to simulate a PID controller on plant model:
-0.5s^2 + 1250
----------------------
s^3 + 47s^2 + 850s -3000
the PID controller is a Kc, Ti Td form with Kc = 12, Ti = 0.2 and Td = 0.1.
I have implementd this in two ways.
1) By solving for the closed loop transfer function with unity feedback and plugging the transfer function directly into a transfer function block in simulink. The input is a step block and output is Out to Workspace.
2) By plugging the PLANT transfer function into a transfer function block, and...

**PID controller for level control**Hi
i am designing a water level controller (just the simulation using labview).
its a simple control system.
a water tank, an inflow and an outflow.
Inflow is manipulated to control the level
Given a setpoint, How can i control the level using a PID controller
If anyone have any examples or solutions of this problem, pls post it here or email <a href="mailto:sreejith1232@yahoo.co.in" target="_blank">sreejith1232@yahoo.co.in</a>
thanx very much
There are several PID controlle...

**to controll 2 PId controller**I have two circle , with two PID controllers. They work for 1 product, but sometimes they work againt each other. I want to disable the 1 pid, and enable the 2pid, and after that, I continue with just the sam value of the 1 pid.
Do you have any idea?
Or an other probability?
Thanks
Hi Roland,
It is a little hard to understand what exactly you are trying to do. I have some guesses about what you mean, but it would be better iif you could provide more explanation in order for us to help you in a meaningful way.
Thanks.
Arkadiy
"Roland Nagy" <mesterroland@yahoo.com>...

**help in using PID controller block in simulink**hi
i am creating a control model using matlab/simulink. I am using a
PID controller block for controlling the system output. But for any
value of the derivative gain i give in the PID block, i am getting an
error which goes like this..
Derivative input 1 of block 'system2test/Subsystem/Integrator' at
time 2.450632977396823e-035 is Inf or NaN. Stopping simulation.
There may be a singularity in the solution. If not, try reducing the
step size (either by reducing the fixed step size or by tightening
the error tolerances)
How do i solve this problem?I tried using a saturation block but...

**PID controller for vector control**Hi all,
I am recently working on vector contorl for induction motor and need to design a PID controller with anti-windup.
Is there any related documents or reference related to induction motor contorl or modelling using matlab ?
Thanks!
"Bill Strong" <yingfenglam@126.com> wrote in message
news:gura29$jgv$1@fred.mathworks.com...
> Hi all,
> I am recently working on vector contorl for induction motor and need to
> design a PID controller with anti-windup.
> Is there any related documents or reference related to induction motor
> contorl or modelling using matl...

**Simulink: PID output when transitioning between Manual and Automatic control?**I am unable to uncover a method to allow a smooth transition between a PID output value, and a static output value. That is, there is a need to control an output that is run via a PID to a stable value, and then allow the PID to pick up from that position and control again on the fly.
The setup is as follows:
I have an output that is a valve position. This is driven by a manual switch which selects between a constant block and a PID block.
The manual switch is controlled programatically.
The constant block output is also controlled programatically.
I'm attempting to align the in...