Real-time calibration of a feedback trap

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题名:	Real-time calibration of a feedback trap
作者:	田溶根;Gavrilov, Momčilo;Jun, Yonggun;Bechhoefer, John
贡献者:	理學院物理學系
关键词:	ALGORITHMS;CALIBRATION;CHEMICAL PROPERTIES;CLOSED-LOOP CONTROL;Computer simulation;DIFFUSION;FEEDBACK;INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY;MAXIMUM-LIKELIHOOD FIT;MOLECULES;Organic chemistry;Parameter estimation;PARTICLES;PHYSICAL PROPERTIES;Real time;REAL TIME SYSTEMS;Scientific apparatus & instruments;SOLUTIONS;STATISTICAL MECHANICS;STOCHASTIC PROCESSES;Time;TIME MEASUREMENT;TRAPS
日期:	2014-09-01
上传时间:	2026-04-23 12:42:36 (UTC+8)
出版者:	American Institute of Physics;United States: American Institute of Physics
摘要:	摘要： Feedback traps use closed-loop control to trap or manipulate small particles and molecules in solution. They have been applied to the measurement of physical and chemical properties of particles and to explore fundamental questions in the non-equilibrium statistical mechanics of small systems. These applications have been hampered by drifts in the electric forces used to manipulate the particles. Although the drifts are small for measurements on the order of seconds, they dominate on time scales of minutes or slower. Here, we show that a recursive maximum likelihood (RML) algorithm can allow real-time measurement and control of electric and stochastic forces over time scales of hours. Simulations show that the RML algorithm recovers known parameters accurately. Experimental estimates of diffusion coefficients are also consistent with expected physical properties. 其他題名： Rev Sci Instrum 出版者： United States: American Institute of Physics 出版日期： 2014-09-01 出處： Review of scientific instruments, 2014-09, Vol.85 (9), p.095102 資源來源： AIP Publishing Journals 版權： 2014 AIP Publishing LLC. 識別號： ISSN: 0034-6748 識別號： ISSN: 1089-7623 識別號： EISSN: 1089-7623 識別號： DOI: 10.1063/1.4894383 識別號： PMID: 25273767
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