Abstract: Fractional Order cascade control architecture to a brake-by-wire system which adapts the suitable controlling actions on breaking system for motor racing applications is described. An electromechanical actuator consisting of an electric motor, a transmission, a master cylinder, and a traditional hydraulic brake (pipe and calliper) are the consisting components of the system. A mathematical model of the system is derived and a fractional order cascade control is proposed. System consisting of two zones, dead zone and operative zone which are correspondingly the inner loop as well as outer of the controller. The inner loop is a position controller and outer a pressure controller. The outer loop features an adaptation mechanism to cope with the nonlinearies of the position–pressure relationship. The stability and robustness of the system are proven.
Keywords: Actuator control, adaptive control, automotive, brake-by-wire (BBW), nonlinear control.