Motor Vehicle Hood Control Using Feedback Loops
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Solution Overview
Problem
Existing motor vehicle hood control systems face challenges in maintaining accurate handling and trajectory control, particularly due to environmental conditions, battery state, vehicle attitude, geometric tolerances, and weight variations.
Innovation Solution
A method and apparatus utilizing an ECU control unit to coordinate electric linear actuators, which includes position and speed feedback loops to adjust control signals and improve hood movement accuracy, minimizing the impact of environmental and operational conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If electric actuators are used to automatically move the hood, then the handling convenience is improved, but the handling accuracy deteriorates due to environmental conditions, battery state, and mechanical tolerances
Solution Approach 1:
The patent implements a feedback control system using sensors to detect the actual hood position and a control unit to compare it with the target position. The system continuously adjusts actuator commands based on the position error, compensating for disturbances from environmental conditions, battery state variations, and mechanical tolerances, thereby maintaining high handling accuracy while preserving automatic operation convenience.
2Measurement precision
If the hood control system is made more complex to improve accuracy, then the handling accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent employs a feedback control architecture where a control unit processes sensor data and generates corrected actuator commands. This approach achieves high handling accuracy through software-based control algorithms rather than complex mechanical structures, keeping the physical device complexity manageable while improving precision through intelligent control.
3Reliability
If the control system compensates for various operating conditions, then the reliability is improved, but the control complexity increases
Solution Approach 1:
The feedback control system automatically compensates for variations in operating conditions such as temperature, battery state, and mechanical tolerances by continuously monitoring actual hood position and adjusting control commands accordingly. This software-based adaptation improves reliability across different conditions without requiring complex hardware modifications for each scenario.
Solution Approach 2:
The control system adapts to varying operating conditions by dynamically adjusting control parameters and commands based on sensor feedback. This allows the system to maintain reliable operation across different temperatures, battery states, and mechanical tolerances through parameter adaptation rather than through complex condition-specific hardware configurations.
Data Source
AI summary
A method for controlling a movement of a hood or of an outer body panel of a motor vehicle, includes the steps of acquiring a first input signal relating to a first quantity indicative of a current position of the hood or of the outer body panel, determining a first reference signal corresponding to a target speed for the movement of the hood or of the outer body panel, determining a first control signal as a function of the determined first reference signal, updating the first control signal as a function of the acquired first input signal, thereby obtaining a second control signal for controlling the actuator device, and controlling the actuator device with the second control signal.