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Experimental Apparatus For Production, Cooling, And Storing Multiply Charged Ions For Charge-Transfer Measurements, Victor H. S. Kwong, T. T. Gibbons, Z. Fang, Jinhua Jiang, H. Knocke, Yingtao Jiang, B. Ruger, Su-Ching Huang, E. Braganza, W. Clark, L. D. Gardner
Experimental Apparatus For Production, Cooling, And Storing Multiply Charged Ions For Charge-Transfer Measurements, Victor H. S. Kwong, T. T. Gibbons, Z. Fang, Jinhua Jiang, H. Knocke, Yingtao Jiang, B. Ruger, Su-Ching Huang, E. Braganza, W. Clark, L. D. Gardner
Electrical & Computer Engineering Faculty Research
A novel method is described that combines the production of ions by laser ablation with an ion‐trap technique for the measurement of thermal‐energy charge‐transfer rates of multiply charged ions and neutrals. The charge‐transfer rate is determined by measuring the rate of loss of stored ions from the trap. Verification of the calibration of the apparatus is demonstrated through investigation of charge transfer of N2 and N2+, which has been studied by another group. We also have made the first measurement on the thermal‐energy charge‐transfer coefficient of Ar and W2+. The rate coefficient is 0.99(0.22)×10−11 …
Adaptive Control Of Decouplable Systems And Nonlinear Flight Control Systems, Sahjendra N. Singh, William R. Wells
Adaptive Control Of Decouplable Systems And Nonlinear Flight Control Systems, Sahjendra N. Singh, William R. Wells
Electrical & Computer Engineering Faculty Research
This paper treats the question of output trajectory tracking in nonlinear systems in the presence of uncertainty. It is assumed that the nominal system is decouplable using state variable feedback. An adaptive control law is derived such that in the closed-loop system, output vector asymptotically converges to the given reference trajectory. The controller includes a dynamic system in the feedback path. This result is applied to design a flight control system to control roll angle, angle of attack and sideslip in rapid, nonlinear maneuvers of aircraft.