7/31/2019 Cruise Control System (Latest)

1/43

TAN CHUN KEAT KEM 090056

KHOO TENG CHIN KEM 090018

NG KONG HAN KEM 090047

SIN LI JIANG KEM 090052

YIP PAK NGIN KEM 090062

7/31/2019 Cruise Control System (Latest)

2/43

used to accurately maintain the drivers desiredset speed without intervention from the driver

control circuit for producing a control signal tocontrol an electric motor of the vehicle

incorporate speed limited functions which do notallow the vehicle to accelerate beyond a pre-setmaximum

7/31/2019 Cruise Control System (Latest)

3/43

7/31/2019 Cruise Control System (Latest)

4/43

Modeling AnalysisController

DesignSimulation

7/31/2019 Cruise Control System (Latest)

5/43

Layout

7/31/2019 Cruise Control System (Latest)

6/43

Schematic

Diagram

7/31/2019 Cruise Control System (Latest)

7/43

Functional

Block

Diagram

7/31/2019 Cruise Control System (Latest)

8/43

Scale Calibration

7/31/2019 Cruise Control System (Latest)

9/43

Potentiometer

7/31/2019 Cruise Control System (Latest)

10/43

Motor & Load

7/31/2019 Cruise Control System (Latest)

11/43

Speedometer

7/31/2019 Cruise Control System (Latest)

12/43

Linear Speed

Conversion

7/31/2019 Cruise Control System (Latest)

13/43

Multiple Block Reduction 1

7/31/2019 Cruise Control System (Latest)

14/43

Multiple Block Reduction 2

7/31/2019 Cruise Control System (Latest)

15/43

Multiple Block Reduction 3

7/31/2019 Cruise Control System (Latest)

16/43

Unity Feedback

7/31/2019 Cruise Control System (Latest)

17/43

Open loop transfer function with unity

feedback

By factorizing it,

ANALYSIS

7/31/2019 Cruise Control System (Latest)

18/43

Comparing the open loop transfer function with the

general secondorder transfer function

Natural frequency, = 105.381

rad/s Damping ratio, = 2.124

7/31/2019 Cruise Control System (Latest)

19/43

Analysis of open loop transfer function by LTI

viewer

7/31/2019 Cruise Control System (Latest)

20/43

7/31/2019 Cruise Control System (Latest)

21/43

7/31/2019 Cruise Control System (Latest)

22/43

Steady state error

Input type: Step input

System type: Type 0

Kp =

= 0.11

7/31/2019 Cruise Control System (Latest)

23/43

Closed loop transfer function

Comparing the closed loop transfer function with the

general secondorder transfer function

Natural frequency=317.0177rad/s, Damping ratio =

0.7059

7/31/2019 Cruise Control System (Latest)

24/43

Peak time

Tp = 0.0014 seconds

%OS

%OS = 4.3678%

Settling time

Ts = 0.0179 seconds

7/31/2019 Cruise Control System (Latest)

25/43

Damping ratio Normalized rise time0.1 1.1040.2 1.2030.3 1.3210.4 1.4630.5 1.6380.6 1.8540.7 2.1260.8 2.4670.9 2.883

7/31/2019 Cruise Control System (Latest)

26/43

7/31/2019 Cruise Control System (Latest)

27/43

7/31/2019 Cruise Control System (Latest)

28/43

7/31/2019 Cruise Control System (Latest)

29/43

7/31/2019 Cruise Control System (Latest)

30/43

7/31/2019 Cruise Control System (Latest)

31/43

7/31/2019 Cruise Control System (Latest)

32/43

7/31/2019 Cruise Control System (Latest)

33/43

7/31/2019 Cruise Control System (Latest)

34/43

Lag Compensator Improves the steady state behavior of the system

Preserving its transient response

Procedure Draw the root locus of the uncompensated

system

Determine desired closed-loop root from desiredspecification

7/31/2019 Cruise Control System (Latest)

35/43

7/31/2019 Cruise Control System (Latest)

36/43

7/31/2019 Cruise Control System (Latest)

37/43

Root locus with compensator added

7/31/2019 Cruise Control System (Latest)

38/43

LTI viewer with compensator added

7/31/2019 Cruise Control System (Latest)

39/43

7/31/2019 Cruise Control System (Latest)

40/43

7/31/2019 Cruise Control System (Latest)

41/43

7/31/2019 Cruise Control System (Latest)

42/43

have modeled and analyzed the cruise controlsystem

compensator is designed to allow the systemto meet the desired performance specification

7/31/2019 Cruise Control System (Latest)

43/43