OSEK-based multiple controllers with schedule feasibility self-testing

Braescu, Florin Catalin; Ferariu, Lavinia; Lazăr, Corneliu

doi:10.1109/speedam.2010.5542060

Cited by 2 publications

(3 citation statements)

References 14 publications

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“…However, OSEK/VDX offers flexibility and scalability, as it may consider various attributes' values for each available object. Moreover, it should be noted that OSEK/VDX provides enhanced capabilities for developing multitasking approaches (rapid commutation between different contexts, predictable interrupts handling, simple access to shared resources, events' handling, management of time through counters and alarms, centralised and local management of errors), as well as extended tracer facilities [14], [15] which permit to monitor the sequence of processed tasks, the execution times and the memory consumption.…”

Section: Osek-based Controller Implementationmentioning

confidence: 99%

OSEK Based Embedded Networked Controller Handling Communication Delays

Braescu

Caruntu

Ferariu

et al. 2011

2011 Second Eastern European Regional Conference on the Engineering of Computer Based Systems

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The paper presents a new embedded networked controller designed for vehicle driveline oscillations damping. To benefit of increased safety and predictability, the controller's algorithm is developed under OSEK/VDX realtime operating system. The implementation is tailored to fit available embedded architecture's resources. Main challenge refers to the configuration of accepted delays, taking into account the required memory consumption and execution times. The controller supports asynchronous exchanges of data, being able to handle certain communication delays. The discrete-time model of the closed-loop controller area network (CAN) based system is obtained by means of polytopic approximation techniques. The suggested embedded controller is designed according to one step ahead predictive control algorithm with flexible control Lyapunov function, assuming that the model admits polytopic uncertainty and hard constraints. If the Lyapunov function is appropriately chosen, the command computation involves solving a single linear program at each sampling period. The proposed approach is experimentally verified using an industrial test-bench setup consisting of a Freescale based electronic control unit (which implements the controller) linked via a CAN bus with a dSPACE MicroAutoBox plant simulator.

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Section: Osek-based Controller Implementationmentioning

confidence: 99%

OSEK Based Embedded Networked Controller Handling Communication Delays

Braescu

Caruntu

Ferariu

et al. 2011

2011 Second Eastern European Regional Conference on the Engineering of Computer Based Systems

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“…If 2 D is connected to 1 G at CAN1 module, a message sent from the 2 D domain to a device of 9 D is received by the 1 G gateway which determines the fastest route 1 3 4 5 G G G G (of cost 5), instead of 1 5 G G (which has a cost of 8). On the contrary, whenever 11 n is detected as overloaded, the corresponding flag aOVLD [11] is set and the 11 n bus is omitted during the route calculation performed by the Task_Gateway_CAN 1 , so the message is sent on 13 n . A solution for avoiding the overload is to re-design the system in such a way that the traffic is diminished between the gateway devices.…”

Section: Study Casementioning

confidence: 99%

“…Moreover, global or partitioned scheduling algorithms can be adopted in order to increase the performance of the distributed gateway system and allow a better CAN traffic control. Some results regarding the feasibility analysis for multi-processor systems are given in [9], [10] and [11].…”

Section: Introductionmentioning

confidence: 99%

OSEK-based gateway algorithm for multi-domain CAN systems

Braescu

Ferariu

Nacu

2011

2011 IEEE 7th International Conference on Intelligent Computer Communication and Processing

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The paper presents a new gateway algorithm designed for multi-domain Controller Area Network (CAN) systems which require to exchange large amount of data between numerous CAN units. The approach is compliant with any hierarchical CAN based distributed architecture, being tailored to efficiently manage CAN domains interconnected by gateways. The communication topologies are encrypted as graphs, aiming a flexible further utilization, increased scalability and a reduce memory consumption. For every handled CAN message, the gateways are enabled to provide a dynamic determination of the fastest available path and to correct buses overloading by appropriate message routing. The gateway algorithm exploits the OSEK event driven scheduling algorithm with static priorities to handle the necessary communication tasks. As consequence, the proposed approach provides increased responsiveness, as well as a good traffic balance between the CAN domains, without the need of transmitting additional messages, as demonstrated on two study cases involving distributed architectures of different complexity orders.

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OSEK-based multiple controllers with schedule feasibility self-testing

Cited by 2 publications

References 14 publications

OSEK Based Embedded Networked Controller Handling Communication Delays

OSEK Based Embedded Networked Controller Handling Communication Delays

OSEK-based gateway algorithm for multi-domain CAN systems

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