Abstract: A battery reservation device (10) includes an input acceptance component (11), a battery number acquisition component (12), and a rental number and capacity calculator (15). The input acceptance component (11) inputs from the user information related to the total power amount of the battery packs (1) that is desired to be rented. The battery number acquisition component (12) acquires information related to the number of battery packs (1) that are installed in a vehicle (20). The rental number and capacity calculator (15) calculates the number and capacity of the battery packs (1) that are rentable at each battery station (30) on the basis of information related to the number of battery packs (1) acquired by the battery number acquisition component (12) and the total power amount of the battery packs (1) inputted to the input acceptance component (11).

Abstract: A battery reservation device (10) comprises a battery state acquisition component (12), a scheduled return time acquisition component (13c), a remaining battery charge prediction component (14), a battery station information acquisition component (15), and a reservation acceptance component (17). The battery state acquisition component (12) acquires the remaining battery charge of a battery pack (1) scheduled to be returned to a battery station (30a). The scheduled return time acquisition component (13c) acquires the scheduled return time of the battery pack (1). The remaining battery charge prediction component (14) predicts the remaining battery charge at the time of return on the basis of the current remaining battery charge of the battery pack (1) and the scheduled return time. The battery station information acquisition component (15) acquires the charging speed of a charger (31).

Abstract: A reservation management device (50) is a reservation management device configured to manage reservations for the exchange of battery packs (10) at a charging device (30) where battery packs (10) are exchanged, said reservation management device (50) comprising a reservation number acquisition component (53), a return number acquisition component (54), and a reservation possibility determination component (55). The reservation number acquisition component (53) is configured to acquire number of battery packs (10) to be reserved at the charging device (30). The return number acquisition component (54) is configured to acquire number of battery packs (10) to be returned to the charging device (30).

Abstract: In one general embodiment, a computer-implemented method includes using, by the computer, a tape head and/or an actuator to detect the presence of external vibration. The method also includes selecting, by the computer, at least one frequency of interest, and using, by the computer, a discrete Fourier transform implemented as a Goertzel filter to determine a magnitude of the external vibration at the at least one frequency of interest. Compensation may optionally be applied to reduce an effect of the external vibration.

Abstract: A tensioning control device having a first motor that applies a torque to a first end of a substrate in a first direction and a second motor that applies a torque to a second end of the substrate in a second direction that is generally opposite the first direction is disclosed. In this manner, the first motor and the second motor apply torque to the substrate in opposing directions, thereby placing the substrate in tension. In one embodiment, the first motor applies a torque to the first end of the substrate that is equal to the torque applied to the second end of the substrate by the second motor. By placing the substrate in tension in this manner, an actuator is able to incrementally move the substrate in a forward direction and a backward direction independent of the tension applied to the substrate.

Abstract: A method for operating a reel-to-reel system of a storage device with a first reel, a second reel, a first motor and a second motor, the first motor drives the first reel and the second motor drives the second reel. The system transports a tape supplied by one of the two reels and taken up by the other reel. A tape velocity and tape tension between the first and reels, and a longitudinal displacement are determined. An estimated state vector depends on the tape velocity, tape tension and longitudinal displacement. A reference state vector depends on a predetermined reference tape velocity and a predetermined reference tape tension. A first control signal and a second control signal are generated dependent on the estimated state vector and the reference state vector. The first motor is controlled by the first control signal and the second motor is controlled by the second control signal.

Abstract: A method according to one embodiment includes selecting an initial radius value (Rfull) for an outgoing reel, where Rfull is the initial radius of a tape on the outgoing reel; unwinding the tape from the outgoing reel; computing a radius value of the tape on the outgoing reel during the unwinding; adjusting the computed radius with an offset calculated from a direct measurement of velocity from the tape position; and outputting the adjusted computed radius. A method according to another embodiment includes selecting an initial radius value (R0) for an incoming reel, where R0 is the initial radius of the incoming reel; winding the tape onto the incoming reel; computing a radius value of the tape on the incoming reel during the winding; adjusting the computed radius with an offset calculated from a direct measurement of velocity from the tape position; and outputting the adjusted computed radius.

Abstract: A method for avoiding tape stiction is provided with a tape drive with a pair of motors for driving a pair of tape reels for conveying data tape across one or more read/write heads. Tachometers measure rotation of the pair of tape reels. Motion of the tape is started and rotation of the tape reels is measured by the tachometers. The measurement of the rotation of the tape reels is compared to determine if there is enough slack associated with tape stiction. The location of tape stiction is stored and weighted. Another method stops motion of the tape at a location wherein excessive tape stiction has not been detected. A tape drive is provided for performing methods for avoiding tape stiction.

Abstract: A control system compensates for web tension variation caused by a first spool, (A) determines rotational frequency of the first spool; (B) determines variation in rotational velocity at the second spool which occurs at the (A) first spool frequency; (C) determines the rotational position at the first spool corresponding to the (B) variation in rotational velocity at the second spool; (D) calculates a drive motor profile for the first spool which tends to cancel the (B) variation in rotational velocity at the second spool; and (E) superimposes the (D) drive motor profile on a first spool drive motor at the (C) determined rotational position of the first spool.

Abstract: Dynamic tension control for tape transported along a tape path between supply and take-up reels, driven by supply and take-up reel motors. Rotational angular velocities of the supply and take-up reels are determined from tachometers, and therefrom a linear speed for the tape at the supply reel, and a linear speed for the tape at the take-up reel are each determined. The tape linear speeds at the reels are compared to determine a delta velocity between the linear speeds. The motors are operated in accordance with a function of the delta velocity to provide a torque to at least one of the reels tending to reduce the delta velocity.

Abstract: Dynamic tension control for tape transported along a tape path between supply and take-up reels, driven by supply and take-up reel motors. Rotational angular velocities of the supply and take-up reels are determined from tachometers, and therefrom a linear speed for the tape at the supply reel, and a linear speed for the tape at the take-up reel are each determined. The tape linear speeds at the reels are compared to determine a delta velocity between the linear speeds. The motors are operated in accordance with a function of the delta velocity to provide a torque to at least one of the reels tending to reduce the delta velocity.

Abstract: A method for detecting slippage in a tape path, and re-calibrating a sensing assembly in a tape storage device to account for the slippage. The method includes sensing a position of one of a supply reel and a take-up reel. In response to sensing the position of the supply reel or take-up reel, sensing a position of a guide roller. The position of the guide roller corresponds to the position of the guide roller when the position of the supply reel or the take-up reel is sensed. In response to sensing the position of the guide roller, the tape media is wound through the tape path between the supply reel and the take-up reel. In response to winding the tape media through the tape path, a second position of the one of the supply reel and the take-up reel is sensed. In response to sensing the second position of the one of the supply reel and the take-up reel, a second position of the guide roller is sensed.

Abstract: A method for detecting slippage in a tape path, and re-calibrating a sensing assembly in a tape storage device to account for the slippage. The method includes sensing a position of one of a supply reel and a take-up reel. In response to sensing the position of the supply reel or take-up reel, sensing a position of a guide roller. The position of the guide roller corresponds to the position of the guide roller when the position of the supply reel or the take-up reel is sensed. In response to sensing the position of the guide roller, the tape media is wound through the tape path between the supply reel and the take-up reel. In response to winding the tape media through the tape path, a second position of the one of the supply reel and the take-up reel is sensed. In response to sensing the second position of the one of the supply reel and the take-up reel, a second position of the guide roller is sensed.

Abstract: Tension is controlled in a recording medium fed from a roll by detecting a rotational velocity of the roll as the recording medium is fed, and applying a torque to the roll to maintain tension in the recording medium. The torque applied by the motor is controlled based on the rotational velocity of the roll.

Abstract: An FF/REW control apparatus which performs high-speed FF/REW by simple control. Conventionally, if a hub diameter is discriminated, even though a user instructs execution of high-speed FF/REW, an operation mode cannot be immediately shifted to a high-speed FF/REW mode. Further, as a software sequence for hub discrimination is required, a ROM capacity for this purpose is required. The FF/REW control apparatus performs high-speed tape forward control for a thick hub and high-speed tape forward control for a thin hub. A system controller 20 calculates a value N representing the ratio between a rotational period of a take-up reel and that of a supply reel, and if the value N is other than values of a tape having the thick hub, immediately performs the high-speed tape forward control for the thin hub. Thus, the high-speed FF/REW can be quickly performed without direct discrimination of hub diameter, and software for this purpose is not necessary.

Abstract: A take-up reel sensor measures a rotation cycle of a take-up reel of a loaded tape cassette in a take-up operation. A changing rate calculating section calculates a changing rate of the rotation cycle measured by the take-up reel sensor. A type discriminating section discriminates the tape cassette as a thick hub type or a thin hub type based on the rotation cycle measured by the take-up reel sensor, while it discriminates the tape cassette as the thin hub type or a VHS-C type based on the changing rate calculated by the changing rate calculating section. A system controller conducts a high speed take-up mode suitable for the type of the tape cassette discriminated by the type discriminating section. Accordingly, the take-up mode can be controlled by employing only the rotation cycle of the take-up reel.

Abstract: An error component such as an eccentricity implicated in an encoder itself is superimposed upon a detected value from an FG due to an assembly error of assemblies themselves and in the manufacturing process. As a result, a speed could not be controlled with a high accuracy and wow and flatter could not be reduced. A tape speed (TSS) signal detected and corrected from the tape transport by FG and PG is inputted into a PLL loop within a data controller (TBC) of a reproducing system. A reproduced signal is converted by an A/D converter in response to a reference clock generated therein and this data is temporarily stored in an FIFO. When this data is reconverted by a D/A converter into an analog signal, if this data is sequentially converted at a timing of an absolute control clock of a quartz oscillator, then it is possible to eliminate the error component superimposed upon the head reproduced signal.