For new additional functions of ESP and for future high dynamic and high performance vehicle stabilizing systems, like Hill Hold Control (HHC) or Steer by Wire (SbW) BOSCH develops the third generation, a flexible and cost-effective Inertial Sensor Cluster called DRS MM 3.x. These new system-functions require additional inertial measuring data about various axes of the dynamic behaviour of the vehicle. The requirements for this new Sensor Cluster are higher robustness, more compactness, easier applicability, higher accuracy and better SNR, insensitivity against external interference, high signal refresh rate, extendability for cross-system applications, higher system availibility and reliability and an integral safety concept. This leads to a modular concept for hard- and software of the Sensor Cluster. For all inertial sensor measuring elements silicon surface micromachining is used. To be insensitive against external mechanical interferences and overloads in the vehicle like linear and angular vibrations the micromachined structures are carefully designed. To increase resolution, signal to noise ratio, linearity and to suppress mechanical crosstalks and parasitic effects a fully digital signal processing with SC-, CDS-, and delta-sigma-technique in closed or open loop control is implemented into ASICs. The communication between the sensor elements and the internal microcontroller takes place via a SPI-interface. Internal logical links, self testing and self monitoring, CAN-interface between the Sensor Cluster and the System-ECUs and the possibility of internal redundacy for high savety-relevant, high dynamic and performance systems meet the future safety relevant requirements. Design, basic functions, modular concept, safety and monitoring concept and system requirements of the new Inertial Sensor Cluster DRS MM 3.x are presented.
New generation of inertial sensor cluster for ESP- and future vehicle stabilizing systems in automotive applications
2003
8 Seiten, 8 Bilder, 20 Quellen
Aufsatz (Konferenz)
Englisch
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