Abstract: A control device includes: a power supply circuit that controls output voltage using a switching element; a generation unit that generates a reference signal on the basis of the output voltage from the power supply circuit; a PWM unit that generates a PWM signal that is output to the switching element by comparing the reference signal with a carrier signal; and a switching unit that switches a frequency of the carrier signal by changing amplitude of the carrier signal, wherein the generation unit generates the reference signal on the basis of the frequency.

Abstract: In this disclosure, equations to be solved in the model predictive control are transformed by using an off-line algebraic simplification method into a matrix operational expression representing a product of a coefficient matrix and a vector regarding solution inputs within a control horizon is equal to a function vector regarding target values of output states and the output states. The size of the coefficient matrix is reduced compared with the conventional matrix. Then, the matrix operational expression is solved in an online plant control apparatus with present output states and present target values of the output stats of a plant to be controlled, by the direct method, to output the solution to the plant.

Abstract: In this disclosure, equations to be solved in the model predictive control are transformed by using an off-line algebraic simplification method into a matrix operational expression representing a product of a coefficient matrix and a vector regarding solution inputs within a control horizon is equal to a function vector regarding target values of output states and the output states. The size of the coefficient matrix is reduced compared with the conventional matrix. Then, the matrix operational expression is solved in an online plant control apparatus with present output states and present target values of the output stats of a plant to be controlled, by the direct method, to output the solution to the plant.

Abstract: In this disclosure, equations to be solved in the model predictive control are transformed by using an off-line algebraic simplification method into a matrix operational expression representing a product of a coefficient matrix and a vector regarding solution inputs within a control horizon is equal to a function vector regarding target values of output states and the output states. The size of the coefficient matrix is reduced compared with the conventional matrix. Then, the matrix operational expression is solved in an online plant control apparatus with present output states and present target values of the output stats of a plant to be controlled, by the direct method, to output the solution to the plant.

Abstract: In this disclosure, equations to be solved in the model predictive control are transformed by using an off-line algebraic simplification method into a matrix operational expression representing a product of a coefficient matrix and a vector regarding solution inputs within a control horizon is equal to a function vector regarding target values of output states and the output states. The size of the coefficient matrix is reduced compared with the conventional matrix. Then, the matrix operational expression is solved in an online plant control apparatus with present output states and present target values of the output stats of a plant to be controlled, by the direct method, to output the solution to the plant.

Abstract: A control device includes: a power supply circuit that controls output voltage using a switching element; a generation unit that generates a reference signal on the basis of the output voltage from the power supply circuit; a PWM unit that generates a PWM signal that is output to the switching element by comparing the reference signal with a carrier signal; and a switching unit that switches a frequency of the carrier signal by changing amplitude of the carrier signal, wherein the generation unit generates the reference signal on the basis of the frequency.

Abstract: By using a model of a transient response characteristic of an engine and a model of a steady-state characteristic of the engine, a disturbance estimate value is calculated. By using this disturbance estimate value, initial command values of a nozzle opening degree of a Variable Nozzle Turbo and a valve opening degree of a Exhaust Gas Recirculator are adjusted in order to reduce model errors and appropriately handle the disturbance. Hence, it is possible to cause Mass Air Flow and Manifold Air Pressure to follow their target values stably.

Abstract: Setting values of a fuel injection quantity for an engine having an exhaust gas recirculator (EGR) and variable nozzle turbo (VNT), and an engine speed, and measurement values of a manifold air pressure (MAP) and a mass air flow (MAF) are obtained. According to a combination of the reference values of an EGR valve opening degree and a VNT nozzle opening degree, which correspond to the setting values, or a combination of a control value of the EGR valve opening degree by a MAF controller and a control value of the VNT nozzle opening degree by a MAP controller, which correspond to the measurement values, a mode that the MAF and MAP controllers, a first interference compensator from the MAF controller to the MAP controller and a second interference compensator for the reverse direction are enabled and a mode that the MAF or MAP controller is enable are dynamically switched.

Abstract: Setting values of a fuel injection quantity for an engine having an exhaust gas recirculator (EGR) and variable nozzle turbo (VNT), and an engine speed, and measurement values of a manifold air pressure (MAP) and a mass air flow (MAF) are obtained. According to a combination of the reference values of an EGR valve opening degree and a VNT nozzle opening degree, which correspond to the setting values, or a combination of a control value of the EGR valve opening degree by a MAF controller and a control value of the VNT nozzle opening degree by a MAP controller, which correspond to the measurement values, a mode that the MAF and MAP controllers, a first interference compensator from the MAF controller to the MAP controller and a second interference compensator for the reverse direction are enabled and a mode that the MAF or MAP controller is enable are dynamically switched.

Abstract: In this disclosure, equations to be solved in the model predictive control are transformed by using an off-line algebraic simplification method into a matrix operational expression representing a product of a coefficient matrix and a vector regarding solution inputs within a control horizon is equal to a function vector regarding target values of output states and the output states. The size of the coefficient matrix is reduced compared with the conventional matrix. Then, the matrix operational expression is solved in an online plant control apparatus with present output states and present target values of the output stats of a plant to be controlled, by the direct method, to output the solution to the plant.

Abstract: A magnetic storage apparatus has a reproducing head to reproduce information from a perpendicular magnetic recording medium that is recorded with servo information, eccentricity correction data and read/write data. The apparatus further has a filter part to filter a reproduced output of the reproducing head by filtering the servo information which has a differentiated waveform by a non-differentiating characteristic and by filtering the eccentricity correction data and the read/write data which have rectangular waveforms by a differentiating characteristic, a demodulating part to demodulate the servo information, the eccentricity correction data and the read/write data that are filtered by the filter part, and a servo system to carry out a control process including an eccentricity control based on the servo information and the eccentricity correction data that are demodulated.

Abstract: By using a model of a transient response characteristic of an engine and a model of a steady-state characteristic of the engine, a disturbance estimate value is calculated. By using this disturbance estimate value, initial command values of a nozzle opening degree of a Variable Nozzle Turbo and a valve opening degree of a Exhaust Gas Recirculator are adjusted in order to reduce model errors and appropriately handle the disturbance. Hence, it is possible to cause Mass Air Flow and Manifold Air Pressure to follow their target values stably.

Abstract: A master-disk producing device produces a master disk with master-disk identification information added. A disk producing device produces a first disk with the master-disk identification information added, using the master disk with the master-disk identification information added. A first disk device obtains, after the first disk with the master-disk identification information added is mounted, first correction information from a correction-information storing device based on the master-disk identification information of the first disk.

Abstract: A magnetic storage apparatus has a reproducing head to reproduce information from a perpendicular magnetic recording medium that is recorded with servo information, eccentricity correction data and read/write data. The apparatus further has a filter part to filter a reproduced output of the reproducing head by filtering the servo information which has a differentiated waveform by a non-differentiating characteristic and by filtering the eccentricity correction data and the read/write data which have rectangular waveforms by a differentiating characteristic, a demodulating part to demodulate the servo information, the eccentricity correction data and the read/write data that are filtered by the filter part, and a servo system to carry out a control process including an eccentricity control based on the servo information and the eccentricity correction data that are demodulated.

Abstract: A magnetic storage apparatus has a reproducing head to reproduce information from a perpendicular magnetic recording medium that is recorded with servo information, eccentricity correction data and read/write data. The apparatus further has a filter part to filter a reproduced output of the reproducing head by filtering the servo information which has a differentiated waveform by a non-differentiating characteristic and by filtering the eccentricity correction data and the read/write data which have rectangular waveforms by a differentiating characteristic, a demodulating part to demodulate the servo information, the eccentricity correction data and the read/write data that are filtered by the filter part, and a servo system to carry out a control process including an eccentricity control based on the servo information and the eccentricity correction data that are demodulated.

Abstract: N groups of servo patterns, each corresponding to the predetermined number of servo sectors, are recorded in a magnetic disk. The magnetic head positioning control apparatus of the present invention produces an RRO current correction table corresponding to each group of servo patters and selects the group of servo patterns that is the best in transferred quality of the sevro pattern as SPopt. For servo sectors (target servo sectors) corresponding to other groups of servo patterns and existing between two adjacent servo sectors corresponding to the SPopt, the magnetic head positioning control apparatus calculates an RRO current correction amount corresponding to the target servo sector by a linear interpolation calculation using the RRO current correction amount corresponding to each of the adjacent servo sectors in the RRO current correction table corresponding to the SPopt to perform the magnetic head positioning control based on the calculated RRO current correction amount.

Abstract: A storing unit stores first correction information for correcting a distortion synchronized with a rotation frequency of servo information of a first disk. A control unit controls positioning of a head on a target track by correcting the servo information of the first disk with the first correction information. Measurement information used for measuring the first correction information is calculated based on second correction information for the servo information in other disk apparatus including a second disk on which the servo information is formed using a common master medium with the first disk.

Abstract: A control system is designed in which a controlled plant is controlled based on output feedback from the controlled plant. An all-pass filter is modeled that is formed of a synthesis of a notch filter compensating for a resonance mode in the control system and the resonance mode. A design controlled plant including the all-pass filter is determined. A controller controls the design controlled plant and includes a weighting function, and, after the weighting function is derived, gain of the weighting function is adjusted using desired gain crossover frequency and phase margin. A phase variable included in a phase-lead weight is determined, and thus the weighting function is determined. H? loop shaping is applied to the weighting function and the design controlled plant to obtain an H? loop controller.

Abstract: An information transfer master has servo information pattern to be magnetically transferred to a magnetic recording medium having a lubrication layer thereon; and a contact surface to contact the magnetic recording medium has surface free energy that is 45 mN/m or less when the servo information pattern is magnetically transferred.

Abstract: The present invention provides a master recording medium, a magnetic transfer method, a magnetic transfer apparatus, and a magnetic recording medium and a magnetic recording and reproducing apparatus thereby made, which are capable of obtaining a good regenerative signal with few even harmonic components such as the second-order harmonic components on reproducing the information transferred to the magnetic recording medium in the case of recording the information on the magnetic recording medium having a magnetic layer composed of the perpendicular magnetization film by the magnetic transfer.