Patent application number | Description | Published |
20120119689 | MOTOR CONTROL SYSTEM - An amount of a rotational angle corresponding to a half of a play (included in an insert-fit coupling device having a maximum production tolerance) is set as a correction amount. When a shift range is changed to a target range, a target rotational angle for an output shaft corresponding to such target range is calculated. The target rotational angle is corrected to get a virtual rotational angle for the output shaft, so that the output shaft may be further rotated by the correction amount in addition to the target rotational angle. A control error for a stop position of a roller is controlled within a half of the play. According to the invention, it is not necessary to carry out a learning process for the play. | 05-17-2012 |
20120123653 | SHIFT-BY-WIRE SYSTEM - When a vehicle electric power source is turned on, and when a target mode position is other than a P-mode position and a D-mode position or the target mode position is unfixed, an SBW-ECU does not drive the actuator so that the current actual mode position is maintained. The SBW-ECU accepts only the driver's requirement for changing the mode position to the P-mode position or the D-mode position. When it is required to change the mode position to the P-mode position, a first position learning portion learns a first reference position. When it is required to change the mode position to the D-mode position, a second position learning portion learns a second reference position. | 05-17-2012 |
20130154537 | MOTOR CONTROL APPARATUS - A motor control apparatus that controls rotation of a rotor of an electric motor powered from an electric power source includes a learning portion that executes an initial drive learning process, and a controller that executes a normal drive operation to sequentially change an exciting phase of the electric motor based on a count value of a counter which is corrected by a correcting portion such that the rotor is rotated to a target position after an initial drive operation is finished. The learning portion re-executes the initial drive learning process after a predetermined condition is satisfied, when the initial drive learning process is failed. | 06-20-2013 |
20140028231 | RANGE SWITCHOVER APPARATUS - When electric power supply is started, an initial driving operation is performed to switch over a power supply phase of a motor in open-loop control. Initial learning processing is performed to learn a phase deviation correction value for the power supply phase relative to a count value of a pulse signal of an encoder. As a restraint caused by a shape of a detent mechanism, the motor need be rotationally driven so that a detent lever does not move in a negative direction beyond a bottom position of a P-range in the initial driving operation. In a case of performing the initial learning processing in the P-range in consideration of this restraint, the initial learning processing is performed by setting a rotation direction of the motor. | 01-30-2014 |
20150035463 | VEHICLE CONTROL SYSTEM - A SBW-ECU prohibits driving of an electric motor by turning off power supply to the motor by a drive prohibition device, when a diagnosis part of a by-wire control circuit determines that a shift-by-wire system is abnormal or a monitor circuit determines that the by-wire control circuit is abnormal. In this case, the motor is stopped from rotating by execution of power supply phase fixation processing, by which a power supply phase of the motor is fixed without switchover, when the motor is driven to rotate at the time of determination of abnormality of the shift-by-wire system. Then the prohibition device prohibits driving of the motor by stopping the power supply to the motor. | 02-05-2015 |
Patent application number | Description | Published |
20120309393 | COMMUNICATION APPARATUS, BASE STATION, AND COMMUNICATION METHOD - A communication apparatus includes memory that stores registration information that indicates a registered mobile terminal registered in a base station; and a processor configured to perform connection processing of connecting a non-registered mobile terminal to the base station, based on a connection request signal from the non-registered mobile terminal not stored in the memory; measure utilization of the base station by the non-registered mobile terminal for which the connection processing has been performed; and transmit obtained measurement results to another communication apparatus via a communication interface. | 12-06-2012 |
20130259015 | CONTROL METHOD OF WIRELESS COMMUNICATING SYSTEM, WIRELESS BASE STATION, WIRELESS TERMINAL, AND WIRELESS COMMUNICATING SYSTEM - A wireless communicating system includes a plurality of wireless terminals having an Ad-hoc communication function and a wireless base station. The wireless base station allows one of the plurality of wireless terminals which requests the same data to a local station to directly receive the data from the local station and allows the other wireless terminal among a plurality of wireless terminals to receive the data from the one wireless terminal by the Ad-hoc communication function of the one wireless terminal. | 10-03-2013 |
20140198740 | APPARATUS AND METHOD FOR CONTROLLING RESOURCES IN A CORE NETWORK - A base station apparatus determines, in accordance with at least one of a communication frequency of a mobile station apparatus, a congestion state of a core network that connects a radio access network and a public network, a number of users being located in a cell of the base station apparatus, and a radio state, a hold period for which a core network resource is to be held, where the core network resource is used for setting a bearer in the core network for the mobile station apparatus. The base station apparatus transmits information indicating the determined hold period to a gateway apparatus in the core network, thereby causing the gateway apparatus to release the core network resource after a period corresponding to the hold period has elapsed. | 07-17-2014 |