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337results about How to "Control changes" patented technology

Coordinated brake control system

A coordinated brake control system is for a hybrid brake system including a regenerative brake unit and a friction brake unit for a vehicle and is arranged to generate a total braking torque which is a combination of a regenerative braking torque generated by the regenerative brake unit and a friction braking torque generated by the friction brake unit, so as to bring the total braking-torque closer to a target braking torque, and to limit a rate of change of the regenerative braking torque according to a response delay of the friction braking torque when a first distribution ratio of the generative braking torque relative to the total braking torque is decreased and when a second distribution ratio of the friction braking torque relative to the total braking torque is increased.
Owner:NISSAN MOTOR CO LTD

Motor drive control apparatus and electric power steering apparatus

A motor drive control apparatus for controlling a motor has a main control part that performs a flux weakening control by a vector control of d-q axes and a rate-limit control part that controls a rate of change in a d axis current command value in the vector control. Further, there is provided a motor control apparatus for controlling a motor has a motor angular speed detection part that detects a motor angular speed of the motor and a motor control part having a current control system that controls the electric motor based on a motor current and a current command value. The motor control part calculate the current command value in which torque becomes constant by considering characteristics of the current control system based on a motor angular speed detected by the motor angular speed detection part.
Owner:NSK LTD

Method and apparatus for a multiple concurrent writer file system

A method and apparatus for a multiple concurrent writer file system are provided. With the method and apparatus, the metadata of a file includes a read lock, a write lock and a concurrent writer flag. If the concurrent writer flag is set, the file allows for multiple writers. That is, multiple processes may write to the same block of data within the file at approximately the same time as long as they are not changing the allocation of the block of data, i.e. either allocating the block, deallocating the block of data, or changing the size of the block of data. Multiple writers is facilitated by allowing processes performing write operations that do not require or result in a change to the allocation of data blocks in a file to use the read lock of a file rather than the write lock of the file. Software serialization or integrity mechanisms may be used to govern the manner by which these concurrent write operations have their results reflected in the file structure. Those processes performing write operations that do require or result in a change in the allocation of data blocks in a file must still acquire the write lock before performing their operation.
Owner:IBM CORP
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