Design optimization of a 14 V automotive power net using a parallelized DIRECT algorithm in a physical simulation

Ruf, Florian; Neiss, Alexander; Barthels, Andreas; Kohler, Tom P.; Michel, Hans-Ulrich; Froeschl, Joachim; Herzog, Hans-Georg

doi:10.1109/optim.2012.6231911

Cited by 8 publications

(11 citation statements)

References 17 publications

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“…In most cases, the Lipschitz constant is always high and so tends to overemphasize global search. But DIRECT method eliminates the need of a Lipschitz constant, and carries out simultaneous searches using all possible slopes from zero to infinity [8] [9], this only requires the dots to lie on the bottom part of the convex hull of the set of dots. So, DIRECT algorithm gives consideration to both global and local exploration.…”

Section: B Property Of Direct Algorithmmentioning

confidence: 99%

LFM signal parameters estimation using an improved DIRECT algorithm

Ding¹,

Cheng²

2014

2014 4th IEEE International Conference on Information Science and Technology

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In the paper, the widely used numerical optimization method for linear frequency modulated (LFM) signal parameters estimation is modified. To this purpose, an improved Dividing RECTangles (DIRECT) algorithm is proposed to substitute for the commonly used grid search method. The proposed global optimization algorithm can provide initial estimates for local optimization algorithms such as Newton and Simplex. Based on classical DIRECT algorithm, the improved version, called Lipschitz constant assisted DIRECT (L-DIRECT) Algorithm, eliminates hopeless areas, suspends unlikely areas, and concentrates on more promising areas in search space, finding the range of attraction (ROA) with lower SNR threshold or less computational burden for local optimization algorithms. The effect of the modification is validated by simulation results.

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Section: B Property Of Direct Algorithmmentioning

confidence: 99%

LFM signal parameters estimation using an improved DIRECT algorithm

Ding¹,

Cheng²

2014

2014 4th IEEE International Conference on Information Science and Technology

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“…In contrary to [7], where a specific dominant load was stabilized at its own terminals, this paper uses more possible placing points T for stabilization units as shown in Fig. 1.…”

Section: Vehicle Power Netmentioning

confidence: 99%

“…The different mechanisms feature different degrees of freedom, which were derived in [7]. In the following subsections, the possible stabilization mechanisms are summarized.…”

Section: B Stabilization Mechanismsmentioning

confidence: 99%

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Topology and Design Optimization of a 14 V Automotive Power Net Using a Modified Discrete PSO in a Physical Simulation

Ruf¹,

Schill²,

Barthels³

et al. 2013

2013 IEEE Vehicle Power and Propulsion Conference (VPPC)

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In the last years, hydraulic powered chassis control systems have been replaced by electrical systems due to efficiency reasons. Additionally, more and more comfort electronics have been integrated. These circumstances have lead to a high power demand in today's automotive power nets. For this reason, voltage stability has become an important design criterion of the power net. This paper describes a simulation based method to optimize the power net topology and the dimensioning of components with regard to voltage stability requirements. A Modified Discrete Particle Swarm Optimization is used in combination with a physical power net simulation. In order to optimize the topology itself, a tool flow for an automated change of the simulation model is presented. To achieve best possible performance, the influence of the configuration parameters on the algorithm performance is evaluated and appropriate parameters are chosen for the given problem. Finally, exemplary optimization results are shown by pointing out optimal topologies for different constraints of the minimum terminal voltage.

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“…Almost every electronic control unit (ECU) has a DC/DC converter close to its terminals to the power net side in order to compensate voltage fluctuations and to supply the electronics with a constant voltage. In addition, DC/DC converters are used to control DC motors, to couple the 48V level with the 12V power net or to stabilize the 12V power net with an additional energy storage (Ruf et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Average Model of a Synchronous Half-Bridge DC/DC Converter Considering Losses and Dynamics

Winter

Moser

Schoenewolf

et al. 2015

Linköping Electronic Conference Proceedings

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Nowadays, power electronic systems play a major role in almost every large system. Due to the high switching frequencies, the simulation of these devices is computationally very expensive and not suitable for system simulation. Average models of these power electronic systems are needed to simulate the basic terminal characteristics of these devices without the need to simulate every switching operation. This paper describes a Modelica implementation of a synchronous half-bridge converter for the use in an automotive power net simulation as well as in real-time environments. The model takes into account the losses in the semiconductors as well as the dynamic behavior of the converter. For the parametrization of the model, only the switching frequency and some values from the datasheets of the used components are required. To validate the proposed model, an equivalent SPICE model is developed, serving as a reference model. The dynamic behavior of the two models is compared using step responses of the load current. The relative deviation of the model's output voltage compared to the SPICE simulation is less than 2 %. Furthermore, also the energetic behavior was investigated, and it is shown that the proposed model provides good results for a wide operating area.

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Design optimization of a 14 V automotive power net using a parallelized DIRECT algorithm in a physical simulation

Cited by 8 publications

References 17 publications

LFM signal parameters estimation using an improved DIRECT algorithm

LFM signal parameters estimation using an improved DIRECT algorithm

Topology and Design Optimization of a 14 V Automotive Power Net Using a Modified Discrete PSO in a Physical Simulation

Average Model of a Synchronous Half-Bridge DC/DC Converter Considering Losses and Dynamics

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