1. Active Seat Suspensions for Automotive Applications
Researcher
Abdulaziz Alfadhli
Academic Staff
Dr Jos Darling & Dr Andrew Hillis
UKACC PhD Presentation Showcase

2. UKACC PhD Presentation Showcase
Introduction
Drivers of off-road vehicles are daily exposed to different vibrations levels from:
1. Internal sources such as the engine, driveline and wheels (25≤𝑓 ≤20,000 Hz).
2. External source: road roughness ( 0≤𝑓 ≤25 Hz) in the vertical direction. (Frequency range of principal human body vibration modes)
Whole Body Vibration
Low frequency & high amplitude
Comfort
Safety
Health
UKACC PhD Presentation Showcase

3. Seat suspensions classification
Cost
Performance
Active
Semi-active
Control Algorithms
Passive
Unavailable or expensive states
Increase jerk and/or seat deflection
UKACC PhD Presentation Showcase

4. New control strategy- Preview information
Preliminary results
Preview information
Preview information allows the control to prepare for incoming disturbance which enhance the performance and reducing actuator time delay.
UKACC PhD Presentation Showcase

5. UKACC PhD Presentation Showcase
Conclusions
Semi-active seat suspensions represent a good compromise between vibration isolation performance and cost.
A control strategy with preview information, that utilises inexpensive and measurable states, is a promising approach which will be investigated theoretically and experimentally.
UKACC PhD Presentation Showcase