Active brake control systems are able to use more accurate control designs on the real-time knowledge of wheel slip such as tire braking forces and external momentums. A multi-objective trade off optimization approach is used to evaluate the inconsistent points of the optimization design namely those of minimizing the directional deviation while achieving maximum braking forces on wheels. Moreover, the optimal target slip values defined by the braking purposes like as shorter stopping distance and stability increment by keeping the vehicle in the straight line. This gets by the control of the longitudinal and lateral slip dynamics of each wheel concerning to the road conditions. A controller is optimally brought up by manipulating optimal control law with weights of two control inputs with mathematical and analytical characterization. The possibility of critical response levels is used to directly control the vehicle directional stability. An impressive simulation technique based on nonlinear vehicle model is applied to define the required possibilities and to cover the design space. Afterwards, an optimization approach is applied to a trade-off between the inconsistent points of the optimization design. The simulation is conducted by the validated vehicle model and the results are indicated that the optimal slip and traction control design by optimizing the value of the longitudinal wheel slip and the external yaw momentum is represented as a preferable braking performance in comparison with the other systems for braking in sever conditions. Model of vehicle Braking torque Real-tin tire-road frictionstim actor IInverse Braking force Wheel slip model controller Inverse ot Cornering stiffngessid p Braking forces distribution algorithm Mz Fx max) Optimal nonlinear controller Braking force model Wi , Wr - WU Optimum of tire longitude slip Pareto Optimal wheel slip optimization Stability Index fwl Sw Reliability Analysis Figure 6. Overview of design, optimization, and control procedure of the system
NONLINEAR ACTIVE BRAKING CONTROLLER: OPTIMAL SLIP AND TRACTION MODELLING APPROACH
2021-06-17
Patent
Elektronische Ressource
Englisch
IPC: | B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF / B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion |
Engineering Index Backfile | 1953
|A new slip controller to reduce braking distance by means of active shock absorbers
Kraftfahrwesen | 2007
|