Study On Active Roll Stabilizer Of Commercial Vehicle

Vehicle ride comfort is important not only for passenger cars, but also for commercial vehicles, especially sightseeing buses and trucks for long-distance transport of goods. However, when conventional passive suspension systems are used, there is a trade-off between vehicle riding comfort and driving safety. Accordingly, compromise is needed when turning the suspension.The active roll stabilizer mechanism consists of a U-shaped stabilizer bar, a single-rod double-acting hydraulic cylinder, a rod and links. Hydraulic actuator force is applied to the left end of the stabilizer bar to produce an anti-roll moment that compensates for the roll generated by the lateral acceleration acting on the center of gravity of the vehicle body. The roll movement of the body is thus suppressed. Load sensor signals are fed to the electronic control unit (ECU) while the vehicle is standing still to correct the vehicle specifications in the ECU. The ECU estimates the lateral acceleration by using the steering angle and vehicle speed sensor signals as inputs. The ECU calculates the objective hydraulic pressures for both actuators every 10ms and sends control signals to the pressure control valves produce anti-roll moment in the appropriate direction. Reliability of the system-simulation model and experiment result show that the fully active hydro-pneumatic suspension system is impractical.