1. Researcher: Jiayang Hu Supervisor: Prof. Andrew Plummer
Compensator Design for Model-in-the-Loop Testing with H-infinity Optimization
Researcher: Jiayang Hu
Supervisor: Prof. Andrew Plummer
University of Bath
UKACC PhD Presentation Showcase

2. Vehicle suspension model
Background
Model-in-the-Loop testing is a method in which the test object is split into a physical part and a simulated part, and connected with actuators and sensors.
An Example of a MiL test system:
Vehicle suspension model
Engine
No MiL MiL
Vehicle Engine
The Shaking Table simulates the movement of vehicle chassis on road.
Multi-Axis Simulation Table
The Engine is mounted on the Shaking Table and turned on, the interaction between the engine and the simulated chassis is observed.
UKACC PhD Presentation Showcase

3. Compensator for MiL Testing
The block Diagram of the Model-in-the-Loop testing system is given as follows:
Very high magnitude high frequency signal may cause the problem of saturation
Road Profile
Actuator
Physical
Driving Signal
Sensor
Simulation
Force Feedback
Compensator
Movement
3rd-order transfer function
High frequency vibration
UKACC PhD Presentation Showcase

4. Compensator Design with H-∞ Optimization
UKACC PhD Presentation Showcase

5. Compensator Design with H-∞ Optimization
Road Profile
Actuator
Physical
Driving Signal
Sensor
Simulation
Force Feedback
Compensator
The high frequency part in the compensated signal is greatly attenuated, without significantly affecting the accuracy of the signal that we want to reproduce.
Movement
UKACC PhD Presentation Showcase

6. Conclusion and Future Work
The H-infinity optimization method showed its effectiveness in this example.
More study is needed for the weighting functions settings and experiment will start soon.
Thank you for your attention!
UKACC PhD Presentation Showcase