Parking Assistance Control Unit Segmentation Strategy
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Solution Overview
Problem
Existing parking assistance systems fail to ensure safe transfer of vehicle control to drivers upon completing entry or exit from a parking space, as they rely on timely driver intervention, which can lead to obstacles being approached due to delayed driving.
Innovation Solution
A parking assistance apparatus with a control unit that performs steering and vehicle speed control processing, terminates one processing when a predetermined condition is met after entering or exiting a parking space, and continues another processing to avoid obstacles and ensure safe transfer of control to the driver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the parking assistance system terminates both steering control and vehicle speed control when the vehicle reaches the target position, then the control processing is simplified and the driver is expected to take over, but the vehicle may approach obstacles due to delayed driver response
Solution Approach 1:
The control processing is segmented into two distinct phases: during parking maneuver, both steering and speed control are active; after target position is reached, only speed control continues while steering control terminates. This segmentation allows the system to maintain comprehensive control when needed while transitioning to partial control for safety, resolving the contradiction between processing efficiency and operational safety.
Solution Approach 2:
The system performs preliminary action by continuing vehicle speed control even after the parking maneuver is complete and the driver should have taken over. This extended control period acts as a safety buffer that compensates for potential driver delay, preventing collisions with obstacles while the driver transitions to manual control.
2Reliability
If the parking assistance system continues both steering control and vehicle speed control after the vehicle reaches the target position, then the safety is improved by preventing obstacle approach, but the control processing complexity increases and the driver takeover is delayed
Solution Approach 1:
The control system is segmented temporally, with steering control terminating at the target position while speed control continues. This segmentation reduces complexity compared to maintaining both controls indefinitely, while still providing the safety buffer needed for driver takeover. The system transitions from dual-control complexity to single-control simplicity at the appropriate moment.
Solution Approach 2:
The system applies partial action by continuing only the necessary speed control after target position is reached, rather than maintaining full dual control. This partial continuation provides sufficient safety margin for driver response without the full complexity of maintaining both steering and speed control, optimizing the balance between safety and system simplicity.
3Ease of operation
If the parking assistance system terminates control processing immediately when the vehicle reaches the target position, then the ease of driver takeover is improved, but the vehicle may collide with obstacles due to delayed driver response
Solution Approach 1:
The system performs preliminary safety action by extending vehicle speed control beyond the point where the driver should have taken over. This extended control period anticipates potential driver delay and provides a safety buffer, preventing collisions while still allowing the driver to transition to manual control at their own pace.
Solution Approach 2:
The system uses feedback from the parking assistance system to determine when the vehicle has reached the target position and to trigger the transition phase. This feedback mechanism allows the system to monitor its own state and adjust control termination timing accordingly, balancing driver takeover ease with continued safety monitoring.
Data Source
AI summary
A parking assistance apparatus includes: a control unit configured to: perform a steering control processing that controls steering of a vehicle and a vehicle speed control processing that controls a traveling speed of the vehicle when the vehicle enters or exits from a parking space; terminate a first processing that is one of the steering control processing and the vehicle speed control processing when a predetermined condition is satisfied after the vehicle starts to enter or exit from the parking space; and continue a second processing that is one of the steering control processing and the vehicle speed control processing other than the first processing.