Vehicle Drive Control with Phase Compensation for Driver Response Feel
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Solution Overview
Problem
The rapid response of electric motors in vehicles leads to a mismatch between the driver's perceived acceleration and the actual vehicle response, causing operability and driving feel to deteriorate due to repeated correction operations.
Innovation Solution
A driving control apparatus that includes a hardware processor to detect operation signals, calculate advance angle compensation and phase delay characteristics, and apply these to the operation signals to match the vehicle's response with the driver's expected operation speed, using a fractional integral to adjust delay accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If an electric motor is used to drive the vehicle, then the response speed of the vehicle increases, but the driver's perception of acceleration becomes mismatched with actual vehicle response, causing operability to deteriorate
Solution Approach 1:
The control device performs preliminary action by calculating advance angle compensation based on the operation frequency band before the driver's correction operation occurs. The hardware processor calculates the phase delay characteristic and applies advance angle compensation to the operation amount signal, anticipating the driver's expected acceleration feel and adjusting the control amount signal accordingly, thereby preventing the mismatch between driver perception and actual vehicle response.
2Ease of operation
If the driver repeatedly performs correction operations to adjust acceleration, then the vehicle acceleration can be adjusted to match driver expectations, but operability and driving feel deteriorate
Solution Approach 1:
The control device implements feedback by continuously monitoring the operation amount signal from the operation member and calculating the phase delay characteristic in real-time. The hardware processor uses this feedback to dynamically adjust the advance angle compensation and generate an appropriately modified control amount signal, eliminating the need for repeated driver correction operations and improving driving feel without time loss.
3Loss of time
If advance angle compensation is applied to compensate for phase delay, then the phase delay in operation frequency band is reduced, but the system complexity increases due to phase delay characteristic calculation
Solution Approach 1:
The control device applies parameter changes by modifying the operation amount signal through calculated phase delay characteristics and advance angle compensation. The hardware processor changes the temporal parameters of the control amount signal based on the operation frequency band, reducing phase delay while managing system complexity through software-based signal processing rather than additional hardware components.
Data Source
AI summary
A driving control apparatus includes an operation amount signal detection part, an advance angle compensation part, and a phase delay controller. The operation amount signal detection part detects an operation amount signal that is outputted from an operation member when a driver operates the operation member. The advance angle compensation part calculates advance angle compensation that compensates for a phase delay in an operation frequency band. The operation frequency band indicates a range of operation speed at which the driver operates the operation member. The phase delay controller calculates a phase delay characteristic that maintains a phase of delay of the operation amount signal at a constant level. The driving control apparatus applies the advance angle compensation and the phase delay characteristic to the operation amount signal, and transmit a resulting signal as a control amount signal for controlling an operation target.