Modelling and Control of a Fixed Calliper-Based Electronic Wedge Brake

Abstract

This paper presents a new design of an electronic fixed calliper-based wedge brake system. The movement of both sides of the brake piston is activated by a wedge block mechanism. The proposed fixed calliper-based electronic wedge brake system is a class of hydraulic-free device. The mechanism consists of two sets of wedge blocks, a ball screw drive shaft, a sliding beam and an electric motor. In this mechanism, the rotation of the shaft of the electric motor is converted into linear motion by using a ball screw drive shaft while the linear motion of the drive shaft will force the sliding beam to be displaced linearly. This will activate the wedge mechanism, which will cause the pad to be displaced tangentially to the disc brake. The movement of the pad in pressing the disc will generate clamping force and produce brake torque when the wheel rotates. In this study, the mathematical model of the system that generates the clamping force was identified. The model was based on a second order transfer function. The proposed mathematical model was then validated experimentally using a brake test rig installed with several sensors and input-output (IO) device. The performance of the brake mechanism in term of rotational input of the drive shaft and clamping force produced by the brake were observed. Accordingly, a torque tracking proportional-integral-derivative (PID) control of the system was proposed and studied through simulation and experiment. Comparisons between experimental results and model responses were made. It is found that the trend between simulation results and experimental data are similar, with an acceptable level of error. Keywords: fixed calliper-based electronic wedge brake, clamping force system modelling and validation, torque tracking control, hardware-in-the-loop-simulation Highlights • This paper presents the modelling and validation of a fixed calliper-based electronic wedge brake. • It also discusses on the effectiveness of the model in order to develop a good control strategy for the FIXEWB. • Based on the developed control strategy, the effectiveness of the proposed torque tracking control of the FIXEWB was studied and presented. • The control strategy developed is based on a PID controller.

Modelling and Validation of An Electronic Wedge Brake System with Realistic Quarter Car Model for Anti-Lock Braking System Design

“…Diagram of internal components of this design can be seen in fig 2. A new model for the same EWB system is developed in [15] using bell shaped model. The UTeM team then developed a fixed caliper EWB system with two wedges, and each wedge has one part fixed and one moving, drive shaft, slider beam and driven by a single motor [16]. A mathematical model is developed by system identification tool to obtain a model which approximates the behaviour of real system.…”

Clamping force control of electro–mechanical brakes based on driver intentions

“…Hence, the clamping force control has been extensively studied throughout this decade. In general, studies on the clamping force of the EMB primarily focus on force control based on sensors [4,6,[14][15][16][17][18][19][20][21] and force estimation without sensors [10,[22][23][24]. Considering the studies on clamping force control, Hoseinnezhad et al proposed a realtime measurement method, and calibrated an EMB characteristic curve based on the method [14].…”

“…Kim et al developed a control strategy based on the brain limbic system-genetic algorithm and compared it with the cascade control method [19]. Ahmad et al established a floating caliper EMB model for the wedge mechanism and proposed a corresponding control method [20]. Park, Choi et al designed a new clamping force controller to overcome the limitation of the response delay of existing solutions [21].…”

“…Ahmad et al . established a floating caliper EMB model for the wedge mechanism and proposed a corresponding control method [ 20 ]. Park, Choi et al .…”

Neural Network-Based High-Accuracy Motion Control of a Class of Torque-Controlled Motor Servo Systems with Input Saturation

“…In addition, only the mechanical dynamical property is considered while the current's dynamic property is neglected when establishing the system's model since the electrical response speed is much higher than the mechanical response speed. Considering all the above factors [25] and [26], the mathematic model of the torquecontrolled motor servo system can be described as:…”