Active Suspension Actuator Testing Using Torque Demand Profiles
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Solution Overview
Problem
Diagnosing issues in active suspension systems of vehicles is challenging due to complex interactions between components, making it difficult for users in service environments to identify faults once the vehicle is no longer in the manufacturing facility.
Innovation Solution
A diagnostic apparatus that generates a torque demand signal to modify the vehicle's suspension, records suspension characteristics, and outputs the results, while ensuring safety preconditions are met, such as the vehicle being stationary and no fault conditions present, to identify any faults in the electromechanical actuator system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If a diagnostic apparatus is introduced to test the electromechanical actuator system, then fault identification capability is improved, but device complexity increases
Solution Approach 1:
A diagnostic apparatus is introduced as an intermediary device between the service user and the electromechanical actuator system. This apparatus includes a controller that generates torque demand signals and processes sensor data, enabling fault detection without requiring the service user to directly analyze complex system interactions. The intermediary device simplifies the diagnostic process while maintaining high fault identification capability.
2Reliability
If safety preconditions are verified before testing, then system safety is improved, but testing time increases
Solution Approach 1:
The diagnostic apparatus performs preliminary verification of safety preconditions before initiating the torque demand test. The controller checks whether the vehicle is stationary and whether fault conditions are absent, and only proceeds with testing if these conditions are satisfied. This preliminary action prevents unsafe testing scenarios while streamlining the overall process by avoiding unnecessary safety checks during actual testing.
Data Source
AI summary
Aspects of the present invention relate to a diagnostic apparatus (100) for use in testing an electromechanical actuator system of a vehicle (500). The diagnostic apparatus comprises one or more controllers (110), and the diagnostic apparatus configured to: generate a torque demand signal (155) corresponding to a torque demand profile (300), the torque demand profile configured to cause actuators of the electromechanical actuator system to modify a suspension of the vehicle (402); transmit the torque demand signal to the electromechanical actuator system of the vehicle (404); record a suspension characteristic of the vehicle in response to application of the torque demand signal (406); and output the recorded suspension characteristic of the vehicle (408).