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Model calculation unit and control device for calculating an rbf model

A technology of model calculation and control equipment, applied in the direction of calculation models, general control systems, general stored program computers, etc., can solve the problems of lack of calculation accuracy and difficulties

Active Publication Date: 2019-04-19
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of physical models, especially in the case of complex interrelationships, the required calculation accuracy is lacking, and with today's computing power it is often difficult to stay within the real-time requirements required for control devices Calculate a model like this

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  • Model calculation unit and control device for calculating an rbf model
  • Model calculation unit and control device for calculating an rbf model
  • Model calculation unit and control device for calculating an rbf model

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Embodiment Construction

[0019] figure 1 By way of example, a schematic diagram of a control device 2 for an engine system 1 with an internal combustion engine 3 is shown as the technical system to be controlled. The control device 2 comprises: a microprocessor 21 and a model calculation unit 22, wherein the microprocessor and the model calculation unit can be configured as separate components or in an integrated manner on separate area areas on the chip Inside. The model calculation unit 22 is in particular a hardware circuit which can be structurally separated from the calculation core of the microprocessor 21 .

[0020] Model calculation unit 22 is essentially hardwired and accordingly is not designed, like microprocessor 21 , to execute software code and thus execute variable functions specified by the software. In other words, no processor is provided in the model calculation unit 22 so that it cannot be run by software code. A resource-optimized realization of such a model calculation unit 22...

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Abstract

The invention relates to a model calculation unit (22) for calculating an RBF model, said calculation unit having a hardwired computing core (11, 13, 14) configured in the hardware for calculating a fixedly specified computing algorithm in coupled functional blocks, wherein the computing core (11, 13, 14) is configured to calculate an output variable for an RBF model as a function of one or more input variables of an input variable vector, interpolation points (V [j, k]), length scales (L[j, k]) and weighting parameters (p3 [j]) specified for each interpolation point, wherein the output variable is formed as a sum of a value calculated for each interpolation point (V[j, k]), the value is a product of a weighting parameter (p3 [j]) assigned to the relevant interpolation point {V[j, k] ) anda result of an exponential function of a value, which is obtained as a function of a square distance of the relevant interpolation point (L[j, k]) from the input variable vector weighted by means ofthe length scales (L[j, k]), and the length scales (L[j, k]) are separately provided for each of the interpolation points as local length scales.

Description

technical field [0001] The present invention relates to the calculation of function models (Funktionsmodelle) in a separate hard-wired model calculation unit, which is used in particular to calculate RBF models (RBF: radial Basis funktion (radial basis kernel function) using local length scales )). Background technique [0002] Functions of technical systems, such as the control of internal combustion engines, electric drives, batteries, etc., are often implemented using models which represent a mathematical mapping of the real system. However, in the case of physical models, especially in the case of complex interrelationships, the required calculation accuracy is lacking, and with today's computing power it is often difficult to stay within the real-time requirements required for control devices Calculate such a model. For such considerations, data-based models are used which describe the correlations between output variables and input variables solely on the basis of tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06N3/063G06N7/00G05B13/04F02P5/15G06F15/78
CPCG06N3/063B60W10/06G05D1/0088G06N3/04
Inventor H.马克特A.贡托罗H.尤尔默E.克洛彭堡
Owner ROBERT BOSCH GMBH