PATENT CLAIM ANALYSIS

Application Number: 15776825
Application Type: Utility
Filing Date: 2018-05
Publication Date: 2019-01
Patent Classification: ["701", "041000"]

Abstract:
A control unit of an electric power steering apparatus that configures a control system on the basis of a physical model of a rack (steering rack) mechanism, configures a model following control where an output of a controlled object follows an output of a reference model, makes a driver feel an appropriate reaction force, and suppresses uncomfortable feeling to the driver by pulling-tendency, is provided. The control unit of the electric power steering apparatus that assists and controls a steering system by driving a motor based on a current command value, includes a configuration of a model following control setting a viscoelastic model for a rack displacement as a reference model, performs a feedback control which inputs a shaft force corresponding to a road surface reaction force, and generates a virtual reaction force, by the configuration of the model following control.

Claim (Index 16):
A control unit of an electric power steering apparatus that assists and controls a steering system by driving a motor based on a current command value, comprising:\n a first shaft force converting section that converts a steering torque into a steering shaft force; a second shaft force converting section that converts a compensation current command value into an assist shaft force; a rack position converting section that converts a rotational angle of said motor into a judgment rack position; a rack position judging section that judges that said judgment rack position exceeds a predetermined first rack position, and outputs a rack displacement and a switching signal; a viscoelastic model following control section that generates a virtual shaft force by setting a viscoelastic model as a reference model based on a shaft force which is obtained by adding said steering shaft force and said assist shaft force, said rack displacement and said switching signal; and a command value converting section that converts said virtual shaft force into a control command value; wherein said viscoelastic model following control section comprises a feedback control section that outputs said virtual shaft force in accordance with a feedback control based on said shaft force and said rack displacement, and a switching section that switches an output of said virtual shaft force in accordance with said switching signal; and wherein said control unit performs said assist and control in accordance with said compensation current command value which is calculated by adding said control command value to said current command value.

Metadata:
- Claim Count in Document: 56.0
- Percentile: 93.0
- Lexical Diversity: 2.125
- Patent Class: 701.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15520162', '15522418', '15512713', '15743791', '16095439']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.4902348207479819
- 35 USC 102 Novelty (BERT): 0.53069142595526
- Combined Prediction Score: 0.4942804812687097
- Mean Citation Score: 331.239704
- Max Citation Score: 381.4572
- Similarity Product: 333.20849888033865

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

Dataset: test