Parking Assistance Device Steering Control Strategy
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Solution Overview
Problem
Conventional parking assistance systems that perform stationary steering during vehicle turning increase the psychological burden on drivers and put excessive load on electric power steering systems.
Innovation Solution
A parking assistance device that determines whether the parking space length is sufficient to avoid stationary steering at turning positions, using a control unit to manage the steering assistance, and includes a temperature sensor to adjust steering control based on the electric power steering system's temperature, thereby reducing driver burden and system overload.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If stationary steering control is performed at turning positions during parking assistance, then the vehicle can complete parking maneuvers in limited spaces, but the psychological burden on the driver increases and the electric power steering system experiences excessive load
Solution Approach 1:
The system dynamically changes the steering control parameter by selecting between stationary steering control and non-stationary steering control based on the parking space length. When the parking space is sufficient (L ≥ L0), non-stationary steering is used to reduce driver burden and steering system load. When the space is limited (L < L0), stationary steering is employed to ensure parking completion.
2Adaptability or versatility
If the number of turning operations is increased to handle various parking scenarios, then parking assistance becomes more versatile, but the overload on the vehicle and steering system increases
Solution Approach 1:
The steering control method is made dynamic by adapting to different parking space conditions. The control unit determines the appropriate steering mode (stationary or non-stationary) based on the detected parking space length, allowing the system to be versatile across different scenarios while avoiding unnecessary steering operations that would cause overload.
3Reliability
If stationary steering control is consistently applied to reduce turning operations, then the steering system load is reduced, but the driver's psychological burden increases
Solution Approach 1:
The control parameter (steering mode) is changed based on parking space conditions. In sufficient spaces, non-stationary steering is used to maintain driver comfort. In limited spaces, stationary steering is applied to ensure parking completion, thus balancing system load reduction with driver psychological comfort.
Data Source
AI summary
A parking assistance device according to an embodiment includes a determination unit that determines, when the parallel parking of a vehicle in a parking area is assisted, whether the parking space length of a frontage that the vehicle enters in the parking area is the sum of the full length of the vehicle and a certain length or more and a control unit that performs parking assistance for the vehicle along a route in which stationary steering control is not performed at a turning position of the vehicle when the parking space length is the sum of the full length of the vehicle and the certain length or more.