Simulation and Analysis of the New Brake System according to Changing of the Spring and Vertical Acceleration of the Wheels

Subject Areas :

Bahman  Karami Pirmohammadi ¹ (Department of Mechanical Engineering, College of Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran|Department of Mechanical Engineering, Faculty of Engineering, Science and Research Branch of Kermanshah, Islamic Azad University, Kermanshah, Iran)
Mehdi  Tajdari ² (Professor, Islamic Azad University, Arak Branch, Department of Mechanical Engineering, Arak, Iran)

Received: 2016-11-16 Accepted : 2017-03-07 Published : 2016-11-01

Keywords: ABS, Proteus, Length Change, Control Unit, SIMULINK, CARSIM, Switch Box,

Abstract :

Moving car on rough road suddenly gets out of its way for some reason and moves to the edge ofthe road at the same speed. Since the most important factor in car overturning is verticalacceleration in the wheels and car speed and road conditions determine the vertical instantaneousacceleration, brake system according to change of the spring length is designed in such a way thatby monitoring the instantaneous acceleration at the wheels, by interrupting the speeding up andapplying the anti-lock braking, this can prevent cars overturning. By placing the sensor on rings ofthe spring, we can send the changing moment of the spring to the ABS control unit. The sensorwhich was a kind of Electromagnetic sensors providing these conditions to control the car withprecise circuit design at the Simulink section in CARSIM software and three-step interface circuitbetween the sensor and ABS brakes at Proteus software. In Simulink software the data that islogged as input has car maneuver variables such as longitudinal speed of the car, which afterprocessing the instantaneous information obtained during maneuvering, variables such as pressurein the wheel brake cylinders, are sent to CARSIM software as the output of the system to continuethe maneuvering. At Simulink model is designed in three parts that include: designing of simulatedcar in the software with the existing parameters, control boxes circuit and also switch boxes forsystem operators which have their task. First, the car goes straight in normal maneuvers, and then itwould be tested in the rugged pathways. In this condition, the success and failure of themaneuvering are checking by the equipping and not equipping the car. After these tests, the rightreal way would be selected and the road will be more completed by placing screws and soilshoulder and margins.