摘要:
A motor controlling apparatus includes a control unit which sets a motor on standby for a predetermined time if an enable signal is applied and sets the motor to a default state by rotating the motor at least once for the next predetermined time. The apparatus includes a driver unit which generates a drive signal to control the motor and outputs the drive signal to the motor. Accordingly, a stepping out of the motor may be prevented.
摘要:
The present invention relates to a method of prepairing a heat-resistant polyamide by carrying out condensation polymerisation with a monomer mixture including a diester compound and a diamine compound. The present invention provides an economical method of prepairing a heat-resistant polyamide in that a monomer, a raw material, is simply and chiefly prepared, and the polymerizing reaction time is short because it does not need solvent separately.
摘要:
A solid oxide fuel cell includes a membrane electrode assembly including an anode, a cathode, and a solid oxide electrolyte membrane disposed between the anode and the cathode; and a porous conductive support disposed at one surface or both surfaces of the membrane electrode assembly. Both the membrane electrode assembly and the porous conductive support have an uneven structure, and are coupled to each other in a male and female coupling manner.
摘要:
A polymer electrolyte includes a heat-treated polymerization product of a polyurethane-based compound and a polyethylene(meth)acrylic acid, wherein the polyurethane-based compound is produced by polymerizing a diisocyanate-based compound, a phosphoric acid-based polyol, and a chain extender. The polymer electrolyte has a high ionic conductivity at high temperatures without causing deformation of an electrolyte membrane. The polymer electrolyte membrane can be inexpensively and simply manufactured, and the thickness of the membrane can be easily controlled. In addition, a large amount of phosphoric acid can be impregnated into the polymer electrolyte. A fuel cell that is operative at a temperature of 100° C. or higher under non-humidified conditions and has improved energy generating efficiency can be prepared by employing the polymer electrolyte membrane.
摘要:
A position control device is provided for controlling a velocity and position of a moving body or a rotating body such as a print head, scanning module, and so forth, and providing a scanner and an image forming apparatus having at least one of such position control devices. The position control device comprises an encoding unit having a color chart on which colors are indicated, a sensing unit for detecting the colors indicated on the color chart, and a control unit for determining the velocity and position of the rotating body or the moving body and controlling the driving of the motor on the basis of detected colors. According to embodiments of the present invention, because the velocity and position are controlled on the basis of values of respective colors detected by the sensing unit, it is possible to control the velocity and position of the rotating body or the moving body substantially as accurately as the resolution of the sensing unit for detecting the colors, and also correctly control the velocity and position substantially without any error even if the rotating body or the moving body slips.
摘要:
A system modeling apparatus and method and a controller designing system and method of performing a system modeling using the same includes applying a step input of a magnitude to a system of interest, sampling a number of outputs according to a predetermined sampling cycle in response to the step input to the system, applying a least square to the sampled output and the sampling cycle to calculate a presumptive maximum output value and a presumptive time constant of the system, repeating the applying, sampling, and calculating operations by at least two times, by varying the magnitude of the step input, to calculate two or more presumptive maximum output values and presumptive time constants, and calculating a DC gain and a time constant of the system using the calculated presumptive maximum output values and the presumptive time constants.
摘要:
An image forming apparatus and method are provided for measuring a moment of inertia and friction coefficient in the image forming apparatus. The image forming apparatus includes a printing unit for printing an image on a medium, and a parameter calculating unit for measuring at least one of a current and velocity of a driving motor and calculating at least one of a moment of inertia and friction coefficient of the image forming apparatus. Accordingly, the image forming apparatus can measure the moment of inertia and friction coefficient of the image forming apparatus without a separate measuring apparatus, and it is possible to inspect an assembled image forming apparatus and parts therein to maintain the image forming apparatus in an optimal printing state.
摘要:
A method of controlling the position of nozzles in an ink-jet type image forming apparatus. Positional information for the nozzles at the time of print-driving the image forming apparatus is calculated by combining a first positional information with a second positional information, wherein the first positional information is measured with reference to a nozzle plate and then recorded as reference information from among various positional information for an effective detection area, which is defined as an area on a print medium measured by a light receiving part of the detection sensor in terms of the amount of reflected light. The second positional information for the effective detection area is measured with reference to a predetermined position of the print medium at the time of print-driving and is variable depending on the movement of the nozzle plate. Accordingly, the relative positional information for the nozzle plate can be accurately set, thereby more accurately controlling the position of the nozzle plate.