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| 2. |
- Gäfvert, Magnus, et al.
(författare)
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Investigation and requirements of a computer control system in a heavy-duty truck
- 2000
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- In this report, which is the first in a series of three reports, an existing computer control system in a heavy-duty truck from Volvo Truck Corporation has been investigated. The aim of the report and of the DICOSMOS case study at Volvo Technological Development is to design and study a future computer control system for a truck and semi-trailer vehicle combination. The functionality in focus is vehicle dynamics control, VDC, which assists the driver to maintain control of his vehicle in difficult situations.
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| 3. |
- Gäfvert, Magnus, et al.
(författare)
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Proposal for a distributed computer control system in heavy-duty trucks
- 2000
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- In designing safety-critical real-time distributed control-systems a great potential lies in combining methods within the areas of dependable computer systems and control theory. In this report a brake system on a heavy-duty truck is used as a case study to discuss the choice of distribution level of the computer system and the control algorithms. The distrubution levels of these system aspects are othogonal in the sense that they may be chosen independently for a certain system configuration. A system configuration is obtained by mapping a specific control algorithm architecture on a computer/communications architecture. To explore different system architectures the combinations of three different distribution levels for the control algorithms and computer/communication systems are investigated with respect to dependability and required information exchange. The result is a proposal on the choice of final distribution level of the brake system.
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| 4. |
- Gäfvert, Magnus, et al.
(författare)
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Truck Model for Yaw Dynamics Control
- 2000
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- This report describes the derivation of a nonlinear model of a tractor-semitrailer combination vehicle. The purpose of the model is validation of yaw-control algorithms. The model include 4 DOF in lateral, longitudinal, and yaw motion. It is formulated as a state-spece model with 5 state variables. Additional states are added with the rotational dynamics of the wheels. The model includes a static description of load-transfer, and a fairly detailed tyre model. A linearized version of the model is also presented. The nonlinear model is implemented in Simulink (TM). Validation is performed by comparison with a multibody model. Examples of simulation outputs are given.
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