This paper is concerned with the directional stability of racing wheelchairs on crown roads. Three types of crown compensators are described and evaluated: the push-pull, the push-push, and the pull-pull. It was found that the push-push and the push-pull types of compensators have the most desirable characteristics, and were, in general, safer than the pull-pull type. In addition, the equations...

Introduction: Total body irradiation (TBI) is a form of external beam radiotherapy which is used in conjunction with chemotherapy with the purpose of immunosuppression. Since the target in TBI is the whole body so a uniform dose distribution throughout the entire body during TBI is necessary. As recommended by AAPM dose variation must be within ±10% of prescription dose. A revi...

David Hasenauer, CODE V Product Manager Introduction During the design of any optical system destined to be manufactured, it is critical to define a fabrication and assembly budget. This budget must consider any potential compensation that will be used during the manufacturing process to mitigate the performance degradation introduced by fabrication variations. It is important to specify the be...

Stochastic robustness synthesis is used to find compensators that solve a benchmark problem. The synthesis minimizes a robustness cost function that is the weighted quadratic sum of stochastic robustness metrics. These metrics probability of instability, probability of actuator saturation, and probability of settling time violation are estimated using Monte Carlo analysis. A simple search metho...

The concept of observer-based compensators (OBCs) and the deterministic separation principle have long been cornerstones of modern control theory. In our paper, we extend these ideas via singular system theory to encompass a wider variety of rational compensators. We show that the separation principle generalizes in a natural way to OBCs of all orders, including the static case. We pay particul...