Classwork I-Q1 A car cruise control system uses the PID control method to automatically control a car in a constant speed on high way. (i) Draw a schematic diagram of the feedback control loop, and describe the quantitative relation of the car speed (v), engine power (w), and car acceleration (a) in the three-order PID control system. Define all parameters clearly in the equation. For the following speed-time curves (i) and (ii), state the reasons for existing problems and propose how to improve the speed stability and accuracy. Set point 80 km/h (ii) Speed km/h Time/min Speed km/h Set point 80 km/h Time/min