Optimization and cost-eectiveness for estimating shock absorber states
Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
The role of the hydraulic shock absorber is to damp oscillations and absorb energy which has a direct impact on the driving. Öhlins Racing has succeeded to produce a sophisticated semiactive technique; CES (Continuously Controlled Electronic Suspension), where the damper is controllable and therefore adaptable for various driving situations.
With the knowledge of difficulties in detecting useful information about the damper-velocity at high frequencies, the aim of the thesis is to find a method which can improve the estimated velocity of a damper mounted on a motorcycle. Sensor fusion is a method which takes multiple measurements into account in an effort to reach an optimal estimate.
The results showed that a Kalman filter which estimated the dampervelocity generated useful information about the sprung and the unsprung mass of the motorcycle. By measuring the position and acceleration of the sprung and the unsprung mass, time delays that are retarding the system could be reduced.
Place, publisher, year, edition, pages
2012. , 35 p.
EES Examensarbete / Master Thesis, XR-EE-RT 2012:032
Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-109758OAI: oai:DiVA.org:kth-109758DiVA: diva2:584007
Master of Science in Engineering - Electrical Engineering