Electro-Hydraulic Composite Brake Control for Multi-Axis Distributed Electric Drive Vehicles
In response to the issue of vehicle brake jitters commonly seen in electric-hydraulic composite braking systems driven by multi-axis distributed motors,two strategies are proposed:a motor braking power correction strategy during the pressure buildup stage and a coordinated control strategy based on feedforward-feedback.These strategies respectively address brake jitter by coordinating the composite braking force during the pressure build-up phase and other stages.A PID control-based strategy for ABS has been developed to resolve the braking conflict arising from the simultaneous operation of the ABS and the motor braking system by adjusting the motor braking force.The effectiveness of the proposed approach was validated by conducting a comprehensive joint simulation using TruckSim,Matlab/Simulink,and AMESim.Results show that the brake jolt decreases by 20.66%during the pressure buildup phase and 92.59%during the motor exit phase,significantly improving the overall driving experience.Furthermore,the ABS control strategy facilitates the recuperation of braking energy while maintaining the ideal slip ratio.Supported by the full vehicle braking test results,the coordinated control strategy achieves efficient recuperation of braking energy while ensuring good braking performance.
multi-axle distributed electric drive vehicleelectro-hydraulic coordinated controlABS and RBS coordinated controlrecuperation of braking energy
国家科技期刊平台
NSTL
万方数据
