Stmicroelectronics S.r.l.

Other

Sgs-thomson Microelectronics S.r.l.

Antonino Cuce'

Matteo Lo Presti

Mario Di Guardo

Davide Platania

Giuseppe Palma

Enrico Pelos

Leonardo Dino Avella

Alberto Rovetta

Gian Guido Rizzotto

Marco Dalessandri

A power modulation control system using PWM pulses is provided. The system comprises an AC voltage generator, an electric load, and a control circuit incorporating at least one rectifier. The electric load is connected between the generator and the rectifier, and first and second monodirectional switches are connected in parallel with the load.

PWM-pulse control system

A method of assessing the neuro-psycho-physical condition of a person includes acquiring, by a self-contained hand held instrumentation, reaction times, execution times and ergometric data of actions performed by the person carrying out a certain test. This test includes processing the time data and the ergometric data for calculating the power exerted in performing each action. Data on the reaction time and the exerted power is processed on the basis of certain software to produce information on the neuro-psycho-physical condition. The ergometric data and reaction time data are processed by a fuzzy logic processor. The hand held instrument may optionally include also motion and voice articulation classifiers.

Instrumental measurement of the neuro-psycho-physical state of a person

A processor operating in a fizzy logic's mode and including a fuzzyfication unit receiving a plurality of input variables on its input and being adapted to compute a membership value of such variables in a membership function, a processing unit connected downstream of the fuzzyfication unit to produce a fuzzy set, i.e. the results of fuzzy logic inference operations performed on the plurality of variables, and a defuzzyfication unit operative to translate the inference results into a so-called crisp value. The processor further includes a first memory device connected to the fuzzyfication unit and containing the set of membership functions, a second memory device connected to the defuzzyfication unit and containing the set of crisp value which appear in the THEN part of the fizzy rules, and a further memory device connected to the defuzzyfication unit.

Fuzzy logic electronic processor

In a method, according to the invention, of storing one or more natural membership functions of respectively one or more natural variables being each defined within a natural universe of discourse having a lowest natural value and a highest natural value, the natural membership functions are normalized through respective normalization coefficients so that they are defined within the same predetermined absolute universe of discourse having a lowest absolute value and a highest absolute value, thereby obtaining one or more absolute membership functions, respectively, and said absolute membership functions and said normalization coefficients are stored, taking account that identical absolute membership functions are stored only once.

Method and apparatus for storing one or more natural membership functions

Fuzzy logic rules are applied to a method for indirectly measuring a physical signal to be monitored which would be difficult to directly measure. The measuring method comprises the steps of obtaining a derived physical signal from the physical signal to be monitored and measuring a value of the derived physical signal and its variations over time at suitably selected check points. A first set of fuzzy logic rules are applied to ascertain the presence or absence of an index signal adapted to mark at least first, second and third operational zones of the derived physical signal. Only the second operational zone is characterized by the presence of the index signal. First and second significant values of the physical signal to be monitored are measured as start and end values, respectively, of the second operational zone. An apparatus for indirectly measuring a physical signal is also disclosed.

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Messina, Italy

Antonino Cuce'