Steering Motor Friction Control via Dynamic Torque Adjustment
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Solution Overview
Problem
Current motor control systems for vehicle steering devices are limited in adjusting friction levels, requiring larger motors to achieve sufficient friction, and lack sophisticated control methods to optimize motor torque and size.
Innovation Solution
A motor control device and method that calculates friction control information based on vehicle state and system friction information, allowing for dynamic adjustment of friction by either decreasing or increasing friction through precise torque control, optimizing motor size and reducing torque requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If motor size is increased to increase friction of the steering device, then friction level is improved, but device complexity and cost increase
Solution Approach 1:
The patent applies dynamics by making the friction control adjustable and variable rather than fixed. The controller dynamically adjusts the torque output of the steering motor based on driving conditions, vehicle speed, and steering angle, enabling the friction level to be optimized for different operational scenarios without requiring a larger motor for all conditions.
Solution Approach 2:
The patent changes the operational parameters of the steering motor (torque, rotational speed) to control friction levels. By adjusting these parameters based on vehicle state and steering requirements, the system achieves variable friction control without increasing motor size, resolving the contradiction between sufficient friction and motor dimensions.
2Force
If motor size is increased to provide sufficient torque for friction control, then torque capability is improved, but productivity and efficiency decrease
Solution Approach 1:
The patent applies partial action by providing torque only when and where needed for friction control, rather than continuously operating at high torque levels. The controller modulates torque output based on actual steering requirements and driving conditions, improving efficiency while maintaining sufficient torque capability when required.
Solution Approach 2:
The system employs periodic adjustment of torque based on oscillating steering inputs and varying driving conditions. The controller continuously monitors and adjusts torque in response to changing steering angles and vehicle states, optimizing the balance between torque capability and energy efficiency through rhythmic, condition-based actuation.
3Stability of the object's composition
If friction control is made more sophisticated with monitoring and adjustment, then steering stability is improved, but device complexity increases
Solution Approach 1:
The patent implements feedback control by continuously monitoring steering torque, vehicle speed, and steering angle, then using this information to adjust motor torque output. This closed-loop control system maintains steering stability by dynamically compensating for friction variations without requiring overly complex hardware additions.
Solution Approach 2:
The controller performs multiple functions using a single integrated system: it manages motor torque output, monitors vehicle state, adjusts friction levels, and maintains steering stability. This multi-functionality achieves sophisticated friction control without proportionally increasing device complexity, as one controller handles multiple control tasks.
Data Source
AI summary
The disclosure relates to a motor control device and method and comprises a calculator calculating friction control information for controlling friction of a steering device based on vehicle state information including information regarding a state of a vehicle and preset system friction information and a controller performing either friction decrease control to control to reduce the friction of the steering device or friction increase control to control to increase the friction of the steering device, based on the friction control information.