An electric power steering control device includes: a vibration extracting filter for performing filter processing on a rotation speed of a motor to reduce a gain on a low frequency side so as to output a vibration-component signal; a current variable gain map for detecting a current flowing through the motor as a first state quantity so as to calculate a current variable gain based on the current; a rotation-speed variable gain map for detecting the rotation speed of the motor as a second state quantity so as to calculate a rotation-speed variable gain based on the rotation speed; a correction mechanism calculating a vibration suppression current; and current controller calculating a target current so as to control the current flowing through the motor.

Electric power steering control device

PROBLEM TO BE SOLVED: To provide an electric power steering apparatus capable of reducing an inertia torque of a steering shaft when a rack shaft collides against a stopper.SOLUTION: The electric power steering apparatus 1 includes the steering shaft 10, the rack shaft 20, the stopper 41, an electric motor 51 which imparts a torque to the steering shaft 10, and a control device 54 that outputs a command signal for controlling the drive current of the electric motor 51. When defining that "an inertia torque" is a torque generated on the steering shaft 10 when the rack shaft 20 collides against the stopper 41, "a compensation torque" is a torque in a direction opposite to the inertia torque, "a compensation current" is a drive current of the electric motor 51 for imparting the compensation torque to the steering shaft 10, and "a compensation command signal" is a command signal for supplying the compensation current to the electric motor 51, the control device 54 outputs the compensation command signal so long as the inertial torque is present.

Electric power steering apparatus

A control apparatus for a multi-phase rotating electric machine includes at least one electric power converter, a command value calculator and an input voltage determiner. The at least one electric power converter converts DC power into multi-phase AC power and supplies the multi-phase AC power to the rotating electric machine. The command value calculator calculates command values for operating the at least one electric power converter. The input voltage determiner determines whether an input voltage of the at least one electric power converter is within a normal operation range. When the input voltage is determined by the input voltage determiner to be outside the normal operation range, the control apparatus switches control to ignore voltage change or current change caused by the reverse input of an external force to the rotating electric machine from a load side or suppress control fluctuation caused by the reverse input of the external force.

Control apparatus for multi-phase rotating electric machine

A printing system comprises a transport path for transporting a web medium. The transport path comprises a slack region wherein the web medium is slack or substantially tension-free. A take-up roller is positioned at a downstream end of the transport path for receiving and winding the web medium. A tensioning device is positioned along the transport path between the slack region and the take-up roller. The tensioning device comprises a first surface arranged for exerting a friction force on the web medium moving over the first surface in a direction opposite to a transport direction of the transport path, such that the web medium is tensioned between the tensioning device and the take-up roller. Since the friction force tensions the web being wound onto the take-up roller, the wound media rolls are tightly wound when applying "loose winding".

Web winding with friction-based tensioning

The invention concerns a method for managing a power steering system, comprising a step (a) of detecting a reversal in the steering direction which involves acquiring a signal, referred to as a "motor torque signal" (C Mot ), representative of the assistance force (C assist ) delivered by the power steering motor, then evaluating the time derivative ( δC Mot / δt ) of said motor torque signal, then comparing said time derivative of the motor torque signal to a predefined variation threshold (S pic ) in order to detect a derivative peak, greater than said variation threshold (S pic ), that indicates a reversal (4) in the steering direction. Said method next comprises a friction evaluation step (b) which involves evaluating the friction from the drop, during the reversal in the steering direction, in a so-called "actuation force signal" (C action ), which is representative of the total actuation force exerted together on the power steering by the driver and by the power steering motor.

Method for detecting a reversal in the steering direction by monitoring the torque supplied by a power steering motor, an application of said method to friction evaluation

PROBLEM TO BE SOLVED: To provide an electric power steering system with good steering feeling which can reduce vibration and noise of a handle when keeping the steering and secure the steering property at normal steering time. SOLUTION: The electric power steering system is provided with a motor 108, a current commanding value determining means B for determining the current commanding value based on the vehicle speed and a torque, a current detecting means 202 for detecting the motor current, and a current controlling means A for outputting a voltage commanding value. It is also provided with a steering state detecting means 30 for detecting the steering state of the handle, outputting a steering signal to the current controlling means A when it is detected that the handle is in a steering maintaining state, and not outputting a steering maintaining signal when it is detected that the handle is in a normal steering state. With the current controlling means A the deviation between the current commanding value and the motor current is input, the current controlling responsiveness is switched over according to the steering state detected by the steering state detecting means 30, and the current commanding value is determined based on the current controlling responsiveness after the switchover and the deviation. COPYRIGHT: (C)2011,JPO&INPIT

Electric power steering system

PROBLEM TO BE SOLVED: To provide a high performance electric power steering device capable of attaining a superior steering wheel returning operation and converging a yaw rate in whatever vehicle speed state may occur. SOLUTION: The electric power steering device comprises a motor for applying a steering assisting power to a steering mechanism, a torque command value calculating part for calculating a torque command value in response to a steering torque generated at a steering shaft and a vehicle speed, and a current command value calculating part for calculating a current command value for the motor in response to the torque command value, wherein the electric power steering device comprises a yaw rate detecting part for detecting or estimating the yaw rate of a vehicle, a preferable yaw rate calculating part for calculating a preferable yaw rate in response to a vehicle speed and a steering angle and a correcting part for correcting the current command value by calculating an amount of correction in response to the yaw rate and the preferable yaw rate. COPYRIGHT: (C)2008,JPO&INPIT

Control apparatus of electric power steering device

Popular Tasks used by Researchers

How can I help with your research?

Get more enhanced response by uploading the PDFs you want me to reference.

No relevant PDFs in your library

SciSpace is the AI research assistant for academics. Run systematic literature reviews on 280M+ papers, and write papers with cited sources. Trusted by 1M+ students, PhDs & researchers.

SciSpace | AI for Research

We encountered an error while loading the panel. Please try refreshing the page.

Something went wrong

Analyze PDFs

Code & Manuscripts

Funding & Grants

Literature & Patents

Medical & Clinical Data

Systematic Review

Visualize & Present

Web & Data

Build a Google Scholar-like website for your research.

Build a website

Create charts and images for your research

Create a Chart

Write a paper for submission to a journal

Draft a manuscript

Patent Search

Design eye-catching scientific posters in minutes.

Scientific Poster Generation

Systematic Literature Review

Anyone with the link can view this chat. You can switch it back to private anytime.

One task is running at the moment. Your messages will be shown right after.

Drag and drop or click here to browse

Loved by <highlight>1 million+</highlight> researchers

Extract a list of specific topics and their sources from unstructured text

Topics

Compare and analyze relevant papers that matches with your search

Papers

Get insights from PDFs and bookmarked papers from your library

My library

Recent searches

Try searching for:

Catch AI-generated content in scholarly and non-scholarly content

{ai} Detector

Ai Writer

Get PDF Summaries, highlighted text explanations 

Chat with PDF

Effortlessly create in-text citations and bibliographies in APA and 2,500 other formats

Citation generator

Get explanations, summaries, and answers on academic papers

Ease up your research workflow with {scispace}'s cohort of exciting AI tools

Elevate your academic writing skills and convey your ideas the way you want

Paraphraser

Explore our range of reading and writing tools

Your file is being prepared and should be ready in a few minutes. If it's a large file, it might take a bit longer. You can close this window, and we'll email you the file when it's done.

You have reached a maximum limit of <strong>{limit}</strong> columns in the table. Remove at least <strong>1</strong> column to add or create another one.

Neshiro Sakae

Author Tools

Chat about Author

Papers

Electric power steering system

Control apparatus of electric power steering device