Electromagnetic Suspension Actuator Mode Switching Control
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Solution Overview
Problem
The existing electrically powered suspension systems experience sudden changes in drive force when switching control modes, leading to strange noise and vehicle behavior disturbances.
Innovation Solution
An electromagnetic actuator system with an information acquirer, a setter, and a drive controller that sets a predetermined control mode based on control mode selection information and ensures the drive force is within a predetermined range, preventing sudden changes during mode switches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If control mode switching is implemented to improve vehicle performance adaptability, then adaptability is improved, but sudden drive force changes occur causing noise and behavior disturbance
Solution Approach 1:
The system performs preliminary actions by checking whether the electromagnetic actuator is within the predetermined force range before allowing control mode switching. This preliminary check prevents switching when the actuator is operating at high force levels where switching would cause noticeable noise or behavior disturbance, thereby resolving the contradiction between adaptability and harmful factors.
Solution Approach 2:
The control system acts as an intermediary between the mode selection input and the electromagnetic actuator. It mediates the switching process by monitoring the actuator's current force state and only permitting mode transitions when conditions are favorable (within predetermined force range), thus preventing direct cause-effect relationships that would produce noise and disturbance.
2Object-affected harmful factors
If control mode switching is restricted to prevent noise, then noise is reduced, but switching responsiveness and adaptability deteriorate
Solution Approach 1:
The system dynamically adjusts the switching permission based on the real-time operating state of the electromagnetic actuator. Rather than using a fixed switching policy, the system continuously monitors the force range and enables switching only when dynamically determined to be safe (within predetermined force range), thus maintaining responsiveness while reducing noise.
3Stability of the object's composition
If drive force is monitored before mode switching, then switching smoothness is improved, but system complexity increases
Solution Approach 1:
The control system performs multiple functions using the same monitoring mechanism. The drive force monitoring serves both to ensure switching smoothness (by checking force range) and to provide operational state information for overall system control. This multi-functionality reduces the need for separate dedicated monitoring systems, thereby limiting the increase in complexity while maintaining stability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Prevents strange noise and vehicle behavior disturbances by smoothly transitioning between control modes without sudden changes in drive force.
Implementation Method 1
The electromagnetic actuator includes an electric motor and a ball screw mechanism. The electromagnetic actuator operates to generate the drive forces for the damping operation and the telescopic operation by converting the rotary motion of the electric motor into the linear motion of the ball screw mechanism.
Data Source
AI summary
Included are an electromagnetic actuator which generates drive forces for a damping operation and a telescopic operation; an information acquirer which acquires information about the drive forces of, and control mode selection information about, the electromagnetic actuator; a drive force arithmetic part which sets a predetermined control mode based on the control mode selection information about the electromagnetic actuator, and sets a target damping force and a target telescopic force of the electromagnetic actuator based on setting information about the control mode; and a drive controller which controls drive of the electromagnetic actuator using a target drive force based on the target damping and telescopic forces set by the drive force arithmetic part. The drive force arithmetic part performs an operation of switching a setting of the predetermined control mode from one to another while a driving force of the electromagnetic actuator is within a predetermined force range.