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Technical Paper

Highly efficient harness design in vehicles through CATIA and CEM integration

2000-06-12
2000-05-0155
The increasing number of electronic and electromechanical systems in cars requires electromagnetic compatible harness designs. The target is, to evaluate the consequences of different cabling-layouts on electronic systems in a very early design phase. To realize this practice oriented EMC simulations of wire harnesses one has to follow different steps. These very steps are described in the presentation. We propose a preprocessing methodology for the CEM that can be performed in an efficient manner by automatization through software tools. In the first step, it is shown how the car body and harness data is directly extracted from a CAD system. An automatized partitioning of the harness and its environment is described. CAD functions and special algorithms are used, that allow for judgement of the harness structure as well as for frequency dependent user control of the relevant spatial range between the harness and surrounding car body parts.
Technical Paper

Software tools and methods for the practice-oriented PDM integration of design and diagnostics of mechatronic systems in vehicles

2000-06-12
2000-05-0114
a practice-oriented approach for an accelerated product development and product design process for mechatronic systems is presented. The handling of complex and versatile product data to perform this process is shown in the area of electrical drives and actuators in cars. It is discussed, how the coordination of all the necessary disciplines as development, design, testing field, specification and release management should be software supported and PDM integrated. The advantages and benefits of the presented methods are shown on particular examples. The necessary software modules are introduced, showing that the realized solution gives both opportunities - the integration into a PDM backbone and at the same time an independent communication within department and/or company. The practical way, to realize the expert-specific needs of the development department, which is not possible with a general PDM system is pointed out.
Technical Paper

Automated car body geometry approximation for electromagnetic field simulation

2000-06-12
2000-05-0268
Due to the increasing number of electrical and electronic system in cars and the fact that all of them have to operate with limited electromagnetic interference, the automotive industry has to deal with an emerging problem: how to simulate as accurately as possible electromagnetic fields in a car body during the design phase while minimizing computation time and costs? EM simulation of components or systems over a wide frequency range raises a variety of problems set aside its inherent complexity. Not only the simulation must take the frequency domain into account it has also to deal with the spatial discretization step. The parameters that the EM simulations are relying on have to be automatically adjusted to the complexity of the CAD data. Therefore to be able to realize an automated translation of CAD data to EM simulation data we propose a new methodology for CAD part approximation and gathering.
Technical Paper

Electrical Drives Work as Virtual Sensors in Cars

2000-06-12
2000-05-0031
An innovative method for the use of electrical machines and drives as sensors in automotive applications is presented. The innovations and advantages resulting out of the described procedures are superior diagnostic capabilities. As a main result higher efficiency and reliability of electrical machinery and mechanical systems in cars may be obtained. An accurate failure recognition of electrical and electromechanical components and systems in a pre-failure-phase is possible, so there is an opportunity for preventive exchange of parts and systems. The presented diagnostics methods, contains not only the opportunity for time- and cost-optimised car service, but also for additional functionalities in electromechanical systems working with drives.
Technical Paper

Modelling and simulation techniques for highly dynamic actuators in vehicles

2000-06-12
2000-05-0034
A methodology for the simulation of the dynamical behaviour of highly dynamical electromagnetic actuators is shown in general. An electromagnetic valve for the control of the active comfort chassis in a vehicle is shown as practice oriented automotive example. The presented procedures based on fully-dynamic considerations and system simulations show, how the optimisation process can be done accurately and at the same time in a very early design phase.
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