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

Abstract

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