Over the last decade, research and development on electrified powertrain have experienced tremendous growth and set up the scene for electrified revolution on several others actuation types within the vehicle (i.e. suspension, braking and traction). Recent development on autonomous driving also increase the demand on more autonomous and fast response actuation. The aforementioned electrification and autonomy are the main drivers to start developing control systems that takes into account the entire picture of the vehicle motion on various vehicle modes. The main aim of this paper is to demonstrate and implement a direct yaw control via electric machines. In this paper, the deceleration only element of this system is demonstrated on simulation and with experimental data. Sliding Mode Control (SMC) is implemented to decelerate the vehicle in longitudinal mode and compensate any yaw instabilities during severe slip events.

In order to characterize hot brake judder from the chassis dynamics point of view, a traditional operational test matrix is performed. In addition to this, more than one hundred accelerations are measured in different critical points of the vehicle chassis. These points are characterized by their tri-dimensional movement using tri-axial accelerometers. The measurement layout selected has been defined in order to determine the main flow of vibration from the wheel-caliper to the body through the knuckle and the sub-frame. Also, the location of sensors at the active and passive side of the sub-frame allow the calculation of the transmissibility though the hard points between the sub-frame and the body. With the objective of exploring braking judder generation and performance, a methodology for judder investigation is proposed. In order to solve judder concerns, a focus on vehicle chassis is needed. In this study, a deep characterization of a judder problem is analysed and a development tool for judder optimization through advanced NVH measurements is consequently presented.

Electrification of vehicle components is one of the major development trends in the automotive industry. Within the brake system, this change has already been implemented in parking brakes. The caliper integrated electromechanical parking brake, for example, became standard in a VW Golf VII, currently one of the best-selling cars [1]. Due to the growing demand for EPB systems, many EPB suppliers have entered the market [2]. The combination of high demand and a large number of possible suppliers, leads to strong competition. Apart from technical features, this competition is heavily influenced by economic characteristics. Competition over the development of electromechanical parking brakes (EPB) requires new developments or product optimizations. At the system level, it is necessary to find a combination of components (actuator, rotary to rotary motion gearing and rotary to translational motion gearing), which fulfill all requirements and will be competitive. How individual components influence the performance characteristics of the overall system is not yet known. This knowledge is of great relevance for future EPB design.