AUTOMOTIVE ELECTRICAL AND ELECTRONIC

CHAPTER 3 : CRUISE CONTROL SYSTEM NAMA KURSUS : AUTOMOTIVE ELECTRICAL AND ELECTRONIC SEKSYEN KURSUS: DAD 5 PENSYARAH: ENCIK KHAIRUL AKMAL BIN NUSI AHLI KUMPULAN: MOHAMMAD SHUKRI BIN YAHYA  01DAD16F2015 THURKHESAN A/L MURUGAN         01DAD16F2016 ZULHARIZ BIN MOHD YUNUS         01DAD16F2019 MUHAMMAD AMIRUL BIN AZIZ     01DAD16F2020 VASANTH A/L JAMBUNATHAN        01DAD16F2024

3.1.1 IDENTIFY CONTROL SYSTEM THEORY § A good cruise control system accelerates aggressively to the desired speed without overshooting, and then maintains that speed with little deviation no matter how much weight is in the car, or how steep the hill you drive up. Controlling the speed of a car is a classic application of  control system theory . The cruise control system controls the speed of the car by adjusting the throttle position, so it needs sensors to tell it the speed and throttle position. It also needs to monitor the controls so it can tell what the desired speed is and when to disengage. § Classical control theory is a branch of control theory that deals with the behavior of dynamical systems with inputs, and how their behavior is modified by feedback, using the Laplace transform as a basic tool to model such systems. 3.1.2 DESCRIBE PROPORTIONAL CONTROL SYSTEM § In a proportional control system, the cruise control adjusts the throttle proportional to...

A  proportional–integral–derivative controller ( PID controller  or  three-term controller ) is a control loop feedback mechanism widely used in industrial control systems and a variety of other applications requiring continuously modulated control. A PID controller continuously calculates an  error value   {\displaystyle e(t)}  as the difference between a desired setpoint (SP) and a measured process variable (PV) and applies a correction based on proportional, integral, and derivative terms (denoted  P ,  I , and  D  respectively), hence the name. In practical terms it automatically applies accurate and responsive correction to a control function. An everyday example is the cruise control on a car, where external influences such as hills (gradients) would decrease speed. The PID algorithm restores from current speed to the desired speed, with small delay an...

3.1.5 explain radar headway sensor § A radar sensor (headway sensor) mounted near the front bumper serves as the eyes for the system. § Other vehicles travelling within the sensor’s range reflect the radar waves, and the sensor picks up the returning signals § In short, this sensor track the distance and speed of vehicle ahead. This information is sent to the main ECU to reduce speed or re-accelerate depending on the position and speed of the car in front.

3.1.6 describe digital signal processor § Digital signal processing (DSP) is the use of digital processing, such as by computers or more specialized digital signal processors, to perform a wide variety of signal processing operations. § Digital signal processing and analog signal processing are subfields of signal processing. DSP applications include audio and speech processing, sonar, radar and other sensor array processing, spectral density estimation, statistical signal processing, digital image processing, signal processing for telecommunications, control systems, biomedical engineering, seismology, among others. § DSP can involve linear or nonlinear operations. Nonlinear signal processing is closely related to nonlinear system identification and can be implemented in the time, frequency, and spatio -temporal domains. § The application of digital computation to signal processing allows for many advantages over analog processing in many applications, such as error detecti...

• The basic functions of automated longitudinal vehicle control are keeping the vehicle a safe distance behind another vehicle . • maintaining a relatively constant speed with the least brake use and applying the brake as fast as possible in emergency situations. • The control of the vehicle's speed and its adaptation to road features, using the throttle and the brake pedal as needed . • Longitudinal controller has the main roll to avoid collision when vehicles which are following each other.