How does the sampling time affect control performance in NCM

1. How does the sampling time affect control performance in NCM Chen Xi

2. References [1] A.Cervin,   D.Henriksson , B. Lincoln,   J. Eker and K.E Arzen , “ How does control timing affect performance? Analysis and simulation of timing using Jitterbug and TrueTime”, Control Systems Magazine, IEEE, June 2003, Volume: 23,  pp. 16- 30 [2] A. Cervin, K.-E. °Arz´en, D. Henriksson, M. Lluesma, P. Balbastre, I. Ripoll and A. Crespo , “Control Loop Timing Analysis Using TrueTime and Jitterbug” Proceedings of the 2006 IEEE , Conference on Computer Aided Control Systems Design, October 4-6, 2006, pp. 1194-1199

3. The main function of Jitterbug • Assert how sensitive the control system is to slow sampling rate, delay ,jitter and other timing problem. • Compute a quadratic performance criterion for a linear control system under various timing conditions. • Combined with TrueTime simulator to determine the influence of the sampling period on the control performance. PLs and PLio are the latency probability distributions obtained from TrueTime.

4. Idea • Modified the NCM model with varing sampling time. And use Jitterbug to judge the relation between the sampling period and control performance cost. • Aided by tins information, then proceed with more detailed control design using TrueTime.

5. Implementation

6. Implementation (continue) • Now have changed the whole model with varying sampling time. And further I will use the jitterbug to test how the sampling time influence the performance . • And then take the sampling time as control input and modify the controller.