摘要:
Disclosed is a speed controller of a motor which comprises a rotation sensor for generating an A.C. signal having a period in accordance with a rotating speed of a motor; speed detection device for effecting detection operations a plurality of times per round of the motor by the A.C. signal of the rotation sensor; compensation device for generating a control signal on the basis of a detection signal of the speed detection device; and driving device for driving the motor in accordance with the control signal of the compensation device; wherein the compensation device includes rotation error detection device for obtaining a rotation error responsive to the detection signal of the speed detection device; memory device for storing a memory value; memory output value generation device for generating a memory output value by the use of the memory value of the memory device; filter device for obtaining a calculation error from the rotation error; renewing and storing device for renewing and storing substantially sequentially the memory value of the memory device by a renewed value corresponding to a value obtained by calculating and synthesizing the calculation error and the memory output value whenever the speed detection device effects Q times detection operations; and control signal generation device for generating a control signal responsive to the rotation error of the memory output value.
摘要:
A control system has a detecting block for obtaining a detected signal corresponding to a controlled variable of a controlled system, and a controlling block for supplying the controlled system with a control signal according to the detected signal. The controlling block includes an error signal producing block for producing an error signal from the detected signal at intervals of a detecting period of time, a memorizing block for storing a plurality of memorized values corresponding to the error signal, and a control signal producing block for producing the control signal by mixing the error signal with one or more of the memorized values. The memorizing block renews the memorized values sequentially and periodically at intervals of a renewing cycle period of time proportional to the detecting period, each with a mixed value computed from the error signal and one or more of the memorized values having been renewed at intervals of L renewing cycle periods, where L is an integer at least equal to 2. The controlling block also includes an operation selecting block for selecting a control operation, and a position detecting block for detecting a physical movement of the controlled system. The position detecting block obtains a stored position of the memorized value corresponding to a physical position of the controlled system so as to utilize the memorized values promptly and correctly when the operation selecting block selects the control operation using the memorizing block.
摘要:
Via a mobile communication network, a transmission apparatus receives position information representing a current position of a reception apparatus. Based on the received position information, the transmission apparatus generates notice data indicating that it is necessary to correct preprogrammed program information identifying a program which has been preprogrammed for viewing or preprogrammed for recording and being generated at the reception apparatus, and transmits the generated notice data to the reception apparatus. Accordingly, a transmission apparatus is provided which generates information that allows preprogramming of a broadcast program for viewing or recording to be properly performed at the reception apparatus side, or which generates a correct broadcast program table, and transmits the generated information or program table to the reception apparatus.
摘要:
A tracking control apparatus for stable tracking lead-in of an optical disc which has wobble grooves as tracks, including: a signal detection unit that detects tracking error and wobble signals from an optical spot; a speed detection unit that calculates a relative moving speed between the optical spot and the tracks; a polarity judgment unit that judges that the optical spot is on a land if a wobble signal amplitude value is equal to or lower than a predetermined value in the vicinity of a zero-cross point; a moving direction judgment unit that, when the relative moving speed is within a predetermined range and the optical spot is on a land, judges a moving direction of the optical spot from a rise/decay direction of the tracking error signal; and a control unit that performs a tracking lead-in by reducing the moving speed, based on the moving speed and moving direction.
摘要:
The object of the present invention is to provide a semiconductor memory which executes executing multiple application programs and duplicating important data from one application program into another application program in security. An IC card (200) is one example of the semiconductor memory of the present invention, and executes executing multiple application programs. The IC card (200) includes: a memory area (331) for storing data relating to a library APL (301); a memory area (332) for storing data relating to a public pool APL (302); a security level setting unit (603) which identifies respective security levels of the library APL (301) and the public pool APL (302) for the data relating to these application programs, based on a criterion for identifying the security level of an application program for the data relating to it; and a data operation unit (608) which duplicates data A stored in the memory area (331) and stores the duplicated data A into the memory area (332), without taking the data A outside of the IC card (200), in the case where the relationship between the two security levels identified by the security level setting unit (603) meets a predetermined condition.
摘要:
A memory card that makes it possible to select the service provided by changing an adapter instead of having selection switches on the outer appearance of the card. The memory card is capable of executing one of a plurality of applications that correspond to individual services and comprises: an adapter that designates one of the services; a main card body to which the adapter is removably connected; an interface for an external device; a memory unit that stores information of the plurality of applications; a detection unit that detects whether or not an adapter is connected to the main card body; and a CPU or LSI that executes the selected application based on the detection signal to provide the service to the external device.
摘要:
A motor speed control apparatus is provided in which the controllable frequency band of the control system can be sufficiently enhanced with a comparatively simple structure even if the frequency generator equipped into the motor is low in output frequency and the rotational accuracy can be highly improved even if the disturbance of high frequency components of load torque is applied to the motor. The frequency band of the control system can be improved by using the estimated speed signal as the speed feedback signal. A motor speed control apparatus superior in disturbance control characteristic can be realized through the feed forward compensation of an estimated load torque.
摘要:
Rubber particles comprising a hydrogenated block copolymer of a conjugated diene and a vinyl aromatic compound, said particles having a glass transition temperature of -30.degree. C. or less, a gel content of at least 10%, an average particle size of 0.01 to 5.0 .mu.m, and a micro-phase separating structure having hard segments and soft segments, wherein hard segments and soft segments are alternately laminated together in the form of concentric multilayers, are useful in reinforcing resin compositions. A particular reinforced resin composition is comprised of a matrix resin having a glass transition temperature of at least 0.degree. C. and 1 to 60% by weight of the above defined rubber particles dispersed in the matrix resin. The rubber particles have a great reinforcing effect on the matrix resin and resin compositions reinforced with these rubber particles are characterized with superior weather resistance, heat stability and impact resistance properties.
摘要:
A semiconductor memory card includes a direction obtainment unit which obtains a first access direction type in which the semiconductor memory card accesses the reader/writer; a condition management unit which previously hold and manages an access condition including two or more of second access direction types; a condition judgment unit which compares two or more of the first access direction types and two or more of the second access direction types, and judges whether or not they match each other; and an execution unit which executes a predetermined application program when it is judged that the first and second access direction types match each other.
摘要:
A mail gateway generates an identifier for each attached file included in the e-mail addressed to a user and held in a mail server, and notifies a mail terminal belonging to the user of a list of generated IDs. When the user selects attached files that the user wants to attach to the e-mail from the list of IDs that is notified from the mail gateway, the mail gateway constructs e-mail including the selected attached files and the mail server transmits the constructed e-mail to addresses of the receivers of the e-mail.