Active vehicle rollover control using a gyroscopic device

Abstract

A gyroscopic system is designed and utilized as an actuator for the prevention of vehicle rollover. The vehicle motion before rollover and during rollover is considered in two phases: before lift-off of the wheels and after lift-off of the wheels. The lateral load transfer ratio is used to identify the time when the wheels lift off the ground. Based on the equations of motion for the vehicle on two wheels, an imminent rollover algorithm is designed to specify the rollover risk. A fuzzy controller that determines the required roll moment to stabilize the vehicle is designed. A gyroscopic package is designed to apply the corrective roll torque directly on the rolling mass of the vehicle in the opposite direction to the rollover moments. The performance of the proposed system is investigated by simulating some severe manoeuvres, and the results show that the system is able to stabilize the vehicle successfully.

Effect of the Gyroscopic Moment, Centrifugal Force and Hydroplaning on the Critical Speed of the Vehicle

“…This confirms that high-speed vehicles (such as racing cars) have a low gravity center height of gravity and large width as the vehicle's design allows. All the mentioned figures are in full agreement with those obtained by: the following researchers : Lambert [6], Zuraul et al [8], Akshey khot [9], Colvin [10], Mashadi et al [12]. Gyroscope and centrifugal effect together critical speed that counted on the bases of the gyroscopic moment in addition to the centrifugal force effect , both together.…”

“…The spin speed of the rotor is high and, according to Eq. 6, other terms can be ignored to obtain a relation that enable us to estimate the rotor dimensions [12], which is:…”

“…Luo et al [11] studied the risk of the water slide on horizontal and vertical slopes and calculate the predicted velocity of water slide using two models that based on Gallaway and USF using three-dimensional laser imaging data and showed that the sliding speed is more sensitive to the lateral slope of the longitudinal slope, decreases with longitudinal grade increase and increases with lateral slope. Mashadi et al [12] designed a gyroscopic system to apply reverse (corrective) torque to the vehicle in the opposite direction of the coup. Its performance has been verified during simulations of some intense maneuvers and the results showed that the system is able to install the car successfully.…”

“…9)Where: = , , ̇= , ̇= the governing equation during the vehicle motion of where rolling not exist as theFig.1.b is: ∑ = 0 (10) This leads to: a. Gyroscope and vehicle coordinate system[12] b. Rear view the non-rolling of the vehicle[12].…”

Using gyro stabilizer for active anti-rollover control of articulated wheeled loader vehicles

“…[12][13][14] Gyro stabilization technology was first applied to two-wheeled vehicles in which the power generated by the gyroscope acted on the vehicle to keep it upright during the movement. 15 Mashadi et al 16,17 introduced a gyroscope device to prevent the vehicle from rolling over. The experimental results showed that the system can successfully stabilize the vehicle.…”