Comparative Assessment and Evaluation of Jitter Control Methods
In this paper, we evaluate three methodologies for reducing the jitter in control tasks: the first one consists of forcing the execution of inputs and outputs at the period boundaries, so trading jitter with delay; the second method reduces jitter and delay by assigning tasks shorter deadlines; whereas, the third method relies on non preemptive execution. We compare these techniques by illustrating examples, pointing out advantages and disadvantages, and evaluating their effects in control applications by simulation. It is found that the deadline advancement method gives the better control performance for most configurations.
- Control Engineering