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US 4,064,444 AGranted
Method and self-adapting damper system having energy balance
AssigneeSociete Francaise d'Equipments pour la Navigation Aerienne
InventorDon-Tri Hoang
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AssigneeSociete Francaise d'Equipments pour la Navigation Aerienne
InventorDon-Tri Hoang
Estimating the term…
A damping system is provided which is a self-adaptive damping system with an energy balance characteristic. The system has a conventional control chain and feedback loop which includes a detection means, an optional corrector, and a controllable damping device. In addition the system further includes an adaptation loop which is at least partly in parallel with the feedback loop and is coupled to and utilizes the information delivered by the detection device. The adaptation loop is coupled to and effects control of the damping device. The adaptation loop includes a comparator, an integrator and two parallel circuits furnishing to the comparator one signal which is a function of the energy of the slow mode of the system to be regulated in the occurrence of the process mode and a second signal which is a function of the product of the energy of the rapid mode and of the relation of the logarithmic decrements of these two modes. The comparator furnishes a result of the comparison to the aforenoted integrator which is connected to the controllable damping device. The invention also provides the method performed by the aforesaid equipment.
A method of regulating the process of a system by self-adaptive damping characterized by energy balance, said process comprising regulating the damping in different regimes in which the process evolves by producing a first signal indicative of a relation expressing the constancy of the sum of the logarithmic decrements of all of the modes of proper movement of the regulated system indicating that all augmentation of stability of one mode obtained by change of regulation is compensated by a loss of stability of one or a plurality of other of said modes and a second signal indicative of the relation of the energies of the modes with respect to the corresponding logarithmic decrements, and combining the signals to establish a connection between the relationships of energy and of stability and thereby of the energy of the different modes as a function of the gain of adjustment.
A self-adapting damping system having energy balance utilized in a regulated system having a servo control with high-frequency and low-frequency modes of operation, said self-adapting system comprising a control chain and a feedback loop comprising detection means, in operative association therewith, and a controllable damping means, said system further comprising an adaptation loop at least partly in parallel with said feedback loop and coupled to and utilizing information delivered by said detection means and coupled to and effecting control of said damping means, the said adaptation loop including a comparator, an integrator, and two circuits connected in parallel and furnishing to said comparator a first signal which is a function of the energy of the slow mode of the regulated system in the occurrence of the process mode and a second signal which is a function of the product of the energy of the rapid mode and of the relation of the logarithmic decrements of these two modes, said comparator furnishing the result of this comparison to said integrator which is connected to the controllable damping means.
A self-adaptive damping process having energy balance and applicable to servo systems with feedback loop to adapt the damping to different regimes in which the process evolves, said process comprising maintaining constant the ratio of the energy of at least two modes of movement of the controlled system such that the total gain of the controlled system remains constant, the constant of said ratio being equal to the inverse ratio of corresponding logarithmic decrements.
Dependencies are inferred from the claim text.