Cancellation of Biodynamic Feedthrough in Vehicle Control Tasks

A practical biodynamic feedthrough model for helicopters

“…Many factors are known to influence BDFT dynamics [17] but undoubtedly the most complex source of variation in BDFT dynamics is the human operator. Not only between-subject variability has shown to be of importance -i.e., differences in body characteristics such as weight and size [1,18] -but also within-subject variability is of great importance -i.e., time-varying factors such as workload [1] and task interpretation [19]. Modeling or accounting for both sources of variability has proven to be a challenging task.…”

Role of Neuron-Specific Splicing Regulators as Modifiers of Neurofibromatosis Type 1

“…A recent approach for compensating motion effects on mobility control (e.g., "vibration breakthrough" or "biodynamic feedthrough") provides a nice example of how recognizing the intrinsic constraints on the system may be beneficial. Rather than working to damp or otherwise eliminate transmission of vehicle motion to the operator, the newly developed method involves recording the vehicle motion, actual disturbances of the operator, and the control input s/he specifies and then uses all this information to subtract unintended input that would normally degrade system performance (Sirouspour & Salcudean, 2003;Sövényi & Gillespie, 2007). Similar examples can be seen in, for instance, adjusting luminance of visual displays to compensate movement-induced reductions in acuity and modifying stiffness of levers and knobs to attenuate the likelihood of erroneous control settings McLeod & Griffin, 1989).…”

“…For example, it is estimated that a vast majority of military applications will require off-road or cross-country mobility (Bianchi, 2007) that will be associated with shocks and vibrations above those experienced on paved and unpaved roads. The potentially catastrophic consequence of attempting to implement more sensitive steer-by-wire interfaces for vehicles operating in such conditions is that shocks and vibrations can be transmitted through the operator to the control system (a phenomenon known as "vibration breakthrough" or "biodynamic feedthrough"), leading to a situation in which unintended control input may degrade the vehicle control (Franks et al, 2004;McLeod & Griffin, 1989;Sövényi & Gillespie, 2007). The CAT vehicle used a multi-function, two-handed yoke as the steering input device for driving and teleoperation (see figure 1).…”

“…Although progress in science and engineering has led to significant advances in the capabilities of tactical military vehicles, a variety of human performance issues has been brought to the fore as a result of current technical solutions for meeting advanced automation needs (Stanton & Marsden, 1997;Stanton & Young, 1998;Sterling & Burns, 2003). Among the problems induced by staffing advanced vehicle systems are biomechanical (Sirouspour & Salcudean, 2003;Sövényi & Gillespie, 2007), cognitive (Parasuraman & Riley, 1997), and psychomotor (Stanton & Marsden, 1997;Stanton & Young, 1998) issues that will negatively affect execution of mission-critical functions. Several factors have been identified as important determinants of the amount and type of performance decrements that will result, including the limited field of view (FOV) brought about by indirect vision systems (e.g., cameras used to see the forward view of the vehicle as opposed to Soldiers looking through vision blocks or an open hatch), time lags in the system control loop, suboptimal characteristics of the steering input device for vehicle control, and finally, physical effects of vehicle motion on the operator (McDowell et al, 2007).…”

Cancelling biodynamic feedthrough requires a subject and task dependent approach

“…To what extent can a model be generalized across situations and/or subjects? It is known that the biodynamic feedthrough dynamics, amongst other factors, can vary between subjects [11] and the task performed [7]; to what extent does this variability influence the quality of a BDFT model? The current paper investigates these questions: the success of signal cancellation is studied, using different BDFT models, with different levels of generality.…”