PATENT CLAIM ANALYSIS

Application Number: 16327606
Application Type: Utility
Filing Date: 2019-02
Publication Date: 2019-08
Patent Classification: ["701", "041000"]

Abstract:
[Problem] An object of the present invention is to provide an electric power steering apparatus that easily obtains equivalent steering torques to vehicle driving information such as a steering angle without being affected by a road surface state and aging-changes of mechanism characteristics of a steering system. [Means for Solving the Problem] The electric power steering apparatus that assist-controls a steering system, comprises: a target steering torque generating section to generate a target steering torque based on vehicle driving information, a converting section to convert the target steering torque into a target torsional angle, and a torsional angle control section to calculate the current command value based on the target torsional angle, a torsional angle of the torsion bar and a motor angular velocity; and the torsional angle control section comprises a torsional angle feedback compensating section to output a target torsional angular velocity corresponding to a deviation between the target torsional angle and the torsional angle, a velocity control section to output the current command value based on the target torsional angular velocity, and a stabilization compensating section to perform feedback to the current command value by setting a transfer function to at least one of angle relation information.

Claim (Index 12):
An electric power steering apparatus that comprises a torsion bar which is provided in a column shaft of a steering wheel of a vehicle, and assist-controls a steering system by driving and controlling a motor connected to said column shaft based on a current command value, comprising:\n a target steering torque generating section to generate a target steering torque based on vehicle driving information, a converting section to convert said target steering torque into a target torsional angle, using a spring constant of said torsion bar, and a torsional angle control section to calculate said current command value based on at least said target torsional angle and a torsional angle of said torsion bar; wherein a steering state which indicates right-turning or left-turning of said steering wheel is inputted into said target steering torque generating section; wherein said target steering torque generating section comprises a basic map to output a first torque signal being vehicle speed sensitive, depending on said vehicle driving information, a phase compensating section disposed at a previous stage or a subsequent stage of said basic map, a hysteresis correcting section to perform hysteresis correction corresponding to said vehicle driving information depending on said steering state and output a second torque signal, a damper gain section to output a third torque signal obtained by multiplying a differential value of said vehicle driving information by a vehicle speed sensitive damper gain, and an output section to output said target steering torque by adding said second torque signal and said third torque signal to said first torque signal; wherein said torsional angle control section comprises a torsional angle feedback compensating section to output a target torsional angular velocity corresponding to a deviation between said target torsional angle and said torsional angle, a velocity control section to input said target torsional angular velocity and a torsional angular velocity, and calculate and output said current command value so that said torsional angular velocity follows said target torsional angular velocity, and a stabilization compensating section to perform feedback to said current command value by setting a transfer function to at least one of angle relation information; and wherein said electric power steering apparatus performs a control so that said torsional angle follows a value depending on said vehicle driving information.

Metadata:
- Claim Count in Document: 2.0
- Percentile: 99.0
- Lexical Diversity: 2.45977
- Patent Class: 701.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['16341100', '16469395', '14419796', '15324813', '15941537']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.4564112260081193
- 35 USC 102 Novelty (BERT): 0.6072936581487366
- Combined Prediction Score: 0.471499469222181
- Mean Citation Score: 403.799658
- Max Citation Score: 530.3881
- Similarity Product: 512.8025955838681

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 0
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test