نتایج جستجو برای: electronic tissue compensators
تعداد نتایج: 1137467 فیلتر نتایج به سال:
In electron and proton radiotherapy, applications of patient-specific electron bolus or proton compensators during radiation treatments are often necessary to accommodate patient body surface irregularities, tissue inhomogeneity, and variations in PTV depths to achieve desired dose distributions. Emerging 3D printing technologies provide alternative fabrication methods for these bolus and compe...
This paper presents a uniied systematic framework of dynamic controller synthesis for systems described by Takagi-Sugeno (T-S) model. The control laws are in the form of so-called parallel distributed compensation (PDC) introduced by the authors. This paper provides two results. First, we introduce the notion of dynamic PDC compensators and provide a set of suf-cient LMI conditions for the exis...
We describe the use of appropriate type simple resistor and capacitor (RC) compensators, which properly connected to a power amplifier, can improve the dynamic performance of MEMS (Microelectromechanical Systems) nanopositioners. Research on compensators led to the design of several simple RC compensators that may be appropriate for the NIST symmetric dual parallel lever nanopositioner. Using b...
Feedback control of fluids is often achieved with limited state measurements. Effective approaches utilize compensators, which can be computed using linear quadratic Gaussian (LQG) or MinMax control designs. However, to achieve real-time control algorithms, these compensators must have low computational complexity. Model reduction methods are a natural choice to build reduced-order compensators...
PUP Compensator In this paper, we consider linear time-invariant multi-input multi-output (MIMO) systems that are stabilizable by proportionalintegral (PI) compensators. Such systems are also stabilizable by a PI-type compensator to be denoted by PIP. The P I P compensator consists of a PI compensator in the feedforward loop preceding the plant to be controlled, and a proportional gain in a fee...
In this paper symbolic quantifier elimination methods are used to explore the fragility of feedback compensators, and to design feedback systems with non-fragile compensators. A compensator is said to be fragile if given variations in compensator parameters result in significant deterioration of feedback performance. The issue of fragility is important in understanding the level of acurracy req...
to discrete-time systems. Specifically, several modifications to the closed-loop discrete-time Lyapunov equation are proposed that guarantee that the compensator dynamics are stable. Using fixed-structure controller optimiztion techniques sufficient conditions for stable compensators with suboptimal H a performance can readily be derived. designing continuous-time stable dynamic compensators z(...
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