Exp 15 Charts and Waveforms

Aim To create a calculator in LabView. Apparatus Required Computer with LabView Software.Objective To realise a calculator using the LabView. Build a waveform and find the maximum and minimum value of XY graph. Disable the numeric control using property node. Build a VI to generate and plot the waveform with 20 points, periods of 0.2 sec, and a start time of 1.5 sec. Display the total duration taken for entire plot, number of sample plotted and the final time. Create a VI to examine the difference, chart type, strip chart, scope chart, strip scope & sweep chart.

To find maximum and minimum value of a XY graph:-

To disable the numeric control using property node:-

To Build a Waveform with 20 points, start time of 1.5sec and period of 2 sec.

Types of charts:-

PROCEDURE:- Open a LabVIEW. Create a blank VI. Create the front panel and block diagram. Add property nodes according to necessity. Add waveform chart and go to property and change to strip, scope and sweep chart. Add max and min from array to get maximum and minimum value.

Table for blocks usedS.NOBLOCKSUSEDFUNCTIONS OF THE BLOCK

1It is simulate signal block. It has a provision to change the offset, amplitude, phase and frequency of the output sine wave.

2

It is a min max block. It gives the position and value of the maximum and minimum of the array.

3

It is random. It produces random numbers between 0 & 1.

4It is an ENUM control.

5

It is used to convert dynamic data to array.

6It is a property node. It can perform functions like blinking the control output or disable it when not needed, moving the block, controlling it by mouse etc.

7It is build waveform block. It builds a waveform or modifies existing one. It can modify the waveform by adding a delay or adding an interval between each data.

8

It is used to time stamp.

9It is get waveform subset. It is used to retrieve a particular data from the waveform.

10It is used to retrieve the duration of the waveform.

RESULT - Thus the given question were realized and implemented using LabView.

Exp 13 -Waveform Generation

Aim: - To create a sine wave and carry out convolution of signals.Apparatus Required Computer with LabView Software.Objective Create a sine wave Convolution of Signals Sine wave and measurement site

Create a sine wave -

Convolution of Signals

Sine wave and measurement site

PROCEDURE:- To create a sine wave: Open a blank VI. Create a logic using express VI to generate a sine VI. Create a numerical constant for varying amplitude ,waves, offset value and t Save and run the program. Convolution of signals: Open a blank VI. Generate to signal using express VI. Use the convolution block from express VI. Save and run the program. Sine wave and measurement site: Open a blank VI. First generate a sine wave. Connect it to the file measurement file from express VI. Save and run the program. Controllers: Open a blank VI. Create a logic for controllers from function palette. Save and run the program.

Table for blocks used

S.NOBLOCKSUSEDFUNCTIONS OF THE BLOCK

1It is simulate signal block. It has a provision to change the offset, amplitude, phase and frequency of the output sine wave.

2

It is convolution and correlation blocks. It performs convolution, deconvolution or correlation of inputs signals.

3

It is write to measurement file block. It is used to save the values of the input signal at the path specified. We can also put in comments to show information about the file.

RESULT:-Thus the sine wave generation and convolution of two signals were successfully done using LabVIEW.

Exp 14 Design a PID Controller for DC Motor using Ziegler Nicholas Tuning MethodAim: - To design a PID controller for a DC motor using Ziegler Nichols tuning method.Apparatus Required Computer with LabView Software.QUESTION:-Design a PID controller for DC motor using Ziegler Nichols tuning method.

PROCEDURE:-(1) Open the LabVIEW software.(2) Create a control and simulation loop.(3) Give a step input to the controller which is connected to the transfer function block.(4) Built an array of the system output and the error signals.(5) Now using data from the array, the output waveform is displayed in XY graph.(6) The controller parameter values are found by Ziegler Nichols tuning method.(7) Delay can also be incorporated in the process transfer function.(8) Thus it is seen that output of the typical PID controller is displayed on XY graph.

Table for blocks used

S.NOBLOCKSUSEDFUNCTIONS OF THE BLOCK

1It is step input. It is used to produce step output of desired step time, final time and initial value.

2It is summation. It is used for feedback to produce difference between set point and process variable.

3It is normal PID controller. We can give the values of Kc, Ti, Td.

4It is used to input transfer function.

5

It is build array.

6It is collector. It collects samples of the signal of the specified number and outputs it in one lot.

Result Hence tuning of DC motor was performed using Zeiglar Nicholas method of tuning.

Exp 7 Implement system with and without Anti windup Control using PID controller

Aim: - Implement system with and without Anti windup Control using PID controller

Apparatus Required Computer with LabView Software.

Without Anti Windup Control

With Anti Windup Contro

PROCEDURE:-(1) Open the LabVIEW software.(2) Create a control and simulation loop.(3) Give a step input to the controller which is connected to the transfer function block.(4) Built an array of the system output and the error signals.(5) Now using data from the array, the output waveform is displayed in XY graph.(6) Delay can also be incorporated in the process transfer function.(7) Thus it is seen that output of the typical PID controller is displayed on XY graph.

Table for blocks used

S.NOBLOCKSUSEDFUNCTIONS OF THE BLOCK

1It is step input. It is used to produce step output of desired step time, final time and initial value.

2It is summation. It is used for feedback to produce difference between set point and process variable.

3It is normal PID controller. We can give the values of Kc, Ti, Td.

4It is used to input transfer function.

5It is transportation delay.

6It is saturation block. It limits the valid range of the input value.

7It is gain. It is multiplies the input with the gain.

8It is simple conventional integrator.

Result Hence tuning of DC motor was performed using Zeiglar Nicholas method of tuning.