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43 results about "Feedback form" patented technology

Signal processing circuit of linear Hall sensor

The invention discloses a signal processing circuit of a linear Hall sensor, which comprises an over-sampling loop and two chopping modulators. The over-sampling loop consists of a CPA (chopping amplifier), a first order loop wave filter, a four-bit digital converter and a feedback circuit, wherein the first order loop filter contains a filter capacitor and an integrating amplifier (ITA). The two chopping modulators are respectively embedded in front of and behind the CPA. The CPA is an operational transconductance amplifier which linearly converts an outputted voltage signal into current and keeps fixed gain under the full conditions. The filter capacitor and the ITA are connected with an active first order wave filter of the over-sampling loop. The four-bit digital converter converts a filtered signal into a four-bit digital signal; and the feedback formed by a four-bit DAC (Digital-to-Analog Converter) and a Hall dish converts an output code into feedback voltage; and the feedback voltage is subtracted from an inputted signal. As the inputted signal is very weak, the offset voltage of the CPA and the flicker noise are modulated by the chopping modulators in front of and behind the CPA into a high-frequency band and are filtered by a wave filter. The constant Gm in the CPA keeps the loop more stable under the full conditions.
Owner:SHANGHAI HUAHONG GRACE SEMICON MFG CORP

Real-time winding forming device for soft grain core mold explosive-carrying composite shell

The invention discloses a real-time winding forming device for a soft grain core mold explosive-carrying composite shell. The real-time winding forming device comprises a composite shell winding forming three-dimensional detection unit and a feedback forming control unit, the composite shell winding forming three-dimensional detection unit is used for obtaining an actual composite shell outer profile size, and comparing the actual composite shell outer profile size with the current fiber layer theoretical model size to obtain the deformation amount and the deformation position of the composite shell; the feedback forming control unit is used for comparing the deformation with a preset threshold value, partitioning the composite shell along the Z-axis direction, adding a fixed number of yarn width sizes to the left and the right of the axial position to form an axial range if the deformation is greater than or equal to the deformation position corresponding to the threshold value, listing the shell into an area to be adjusted along the area of the axial range, and listing the remaining areas into areas which do not need to be adjusted; the winding process parameters of the next layer is adjusted at the deformation position of the area to be adjusted so as to modify the thickness of the next winding layer to compensate the deformation; and machine tool motion parameters are outputted according to the adjusted winding process parameters of the next layer to control the winding process of the next winding layer.
Owner:SHANGHAI XINLI POWER EQUIP RES INST

Output correction control method of multi-input multi-output nonlinear differential algebra subsystem

InactiveCN109459932AThe backstepping method is simple and practicalAdaptive controlMulti inputBackstepping
The invention discloses an output correction control method of a multi-input multi-output nonlinear differential algebra subsystem. The output correction control method comprises the steps that the multi-input multi-output nonlinear differential algebra subsystem is created, the multi-input multi-output nonlinear differential algebra subsystem comprises a plurality of nonlinear differential subsystems, and vector relative orders exist in the multi-input multi-output nonlinear differential algebra subsystem, the step number sum of the vector relative orders is less than differential variable dimension; differential homeomorphism of a non-input multi-output nonlinear differential algebra subsystem is calculated, the non-input multi-output nonlinear differential algebra subsystem is convertedinto an equivalent system through the differential homeomorphism and state feedback, and the equivalent system comprises a plurality of equivalent subsystems; a subsystem controller of each equivalent subsystem is constructed through a backstepping method; each group of the subsystem controllers and state feedback form a large system output correction controller. The output correction control method of the multi-input multi-output nonlinear differential algebra subsystem has the advantages that the range of controlled objects is wider, and the method is applied to an electric system so that the system tends to be stable.
Owner:NANJING UNIV OF INFORMATION SCI & TECH
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