This study compared shoulder and elbow joint forces and moments between weight-relief lifts (WRLs) and sitting pivot transfers (SPTs) among manual wheelchair users with spinal cord injury (SCI) (N = 13) during biomechanical laboratory assessment. Minimum and maximum values were reported for each triaxial component of the joint force at the dominant shoulder and elbow during SPTs (leading and tr...

This application paper addresses the use of adaptive predictive control on arc welding trailing centerline temperature control. For tackling the high level of uncertainty in the process the multivariable multipredictive adaptive regulator (MUSMAR) adaptive algorithm, relying on separate estimation of predictive models is used. Experimental results presented include characterization of plant unc...

The effect of amplitude and rate control constraints in active flutter suppression is analysed for a number of different state feedback control laws considering mathematical model of two degree-of freedom nonlinear aeroelastic airfoil system with trailing and leading edge flaps. The size of region of attraction is used as an additional metric to select a set of acceptable control laws designed ...

The choice of the memory factor a simulates the intensity of the memory effect: the limit case a ! 1 corresponds to a memory with equally weighted records (full memory), whereas a ` 1 intensifies the contribution of the most recent states (short-term memory). The choice a ! 0 leads to the ahistoric model. This kind of memory implementation will be referred to as a-memory. Limited trailing memor...

The initial stage of fretting fatigue crack growth is significantly influenced by tangential force induced by fretting action along the contact surface where a mixed-mode crack growth is involved. Fretting crack behavior of aluminum alloy 2024 was studied, taking into account the problem of contact asperities. Finite element was used for the determination of the stress field near the contact su...

Wheel roughness measurements available from several different campaigns are presented in terms of average levels and dispersion. The dependence on factors such as brake type and whether the wheel is powered or trailing is also addressed. A method to decide how many wheels from a train are to be measured is then presented. Finally, the main outcomes are described from a round robin test aimed at...