动态系统的在线实时学习来自杂的数据流
S Sinha1, S P Nandanoori2, D A Barajas-Solano2
1Pacific Northwest National Laboratory, Richland, WA, 99354, USA. subhrajit.sinha@pnnl.gov.
Scientific reports
|December 18, 2023
概括
这项研究引入了一种新的算法,用于噪音动态系统的实时学习. 它使用强大的库普曼操作员框架来准确识别和控制系统.
科学领域:
- 动态系统理论 动态系统理论
- 数据科学数据科学数据科学
- 控制工程 控制工程 控制工程
背景情况:
- 来自物理系统的高频实时数据采集正在取得进展.
- 测量噪声通常会破坏传感器数据,这对分析提出了挑战.
- 像扩展动态模式分解 (EDMD) 这样的现有方法可以是计算密集的.
研究的目的:
- 从杂的时间序列数据中开发一种用于在线实时学习动态系统的新算法.
- 为了减轻测量噪声对系统识别的影响.
- 为现有方法提供一个计算效率高的替代方案.
主要方法:
- 拟议的算法使用了强大的库普曼运算符框架.
- 它可以在线实时监控和分析动态系统.
- 该方法实现了系统动态的线性表示.
主要成果:
- 该算法有效地减轻时间序列数据中的测量噪声.
- 与EDMD相比,它提供了比较快速和不那么密集的计算方法.
- 证明了成功识别各种系统,包括振荡器,混乱地图和电力网络.
结论:
- 这种新的算法为杂的动态系统提供了高效和强大的在线学习.
- 它的线性表示方便了线性系统理论用于分析和控制的应用.
- 该方法在各种物理系统中显示了广泛的适用性.
相关概念视频
Linear time-invariant Systems
262
A system is linear if it displays the characteristics of homogeneity and additivity, together termed the superposition property. This principle is fundamental in all linear systems. Linear time-invariant (LTI) systems include systems with linear elements and constant parameters.
The input-output behavior of an LTI system can be fully defined by its response to an impulsive excitation at its input. Once this impulse response is known, the system's reaction to any other input can be...
The input-output behavior of an LTI system can be fully defined by its response to an impulsive excitation at its input. Once this impulse response is known, the system's reaction to any other input can be...
262
BIBO stability of continuous and discrete -time systems
399
System stability is a fundamental concept in signal processing, often assessed using convolution. For a system to be considered bounded-input bounded-output (BIBO) stable, any bounded input signal must produce a bounded output signal. A bounded input signal is one where the modulus does not exceed a certain constant at any point in time.
To determine the BIBO stability, the convolution integral is utilized when a bounded continuous-time input is applied to a Linear Time-Invariant (LTI) system....
To determine the BIBO stability, the convolution integral is utilized when a bounded continuous-time input is applied to a Linear Time-Invariant (LTI) system....
399
Rapidly Varying Flow
64
Rapidly varying flow (RVF) in open channels is characterized by abrupt changes in flow depth over a short distance, with the rate of depth change relative to distance often approaching unity. These flows are inherently complex due to their transient and multi-dimensional nature, making exact analysis difficult. However, approximate solutions using simplified models provide valuable insights into their behavior.Key Features of Rapidly Varying FlowRVF is commonly observed in scenarios involving...
64
Multi-input and Multi-variable systems
106
Cruise control systems in cars are designed as multi-input systems to maintain a driver's desired speed while compensating for external disturbances such as changes in terrain. The block diagram for a cruise control system typically includes two main inputs: the desired speed set by the driver and any external disturbances, such as the incline of the road. By adjusting the engine throttle, the system maintains the vehicle's speed as close to the desired value as possible.
In the absence...
In the absence...
106
Basic Continuous Time Signals
214
Basic continuous-time signals include the unit step function, unit impulse function, and unit ramp function, collectively referred to as singularity functions. Singularity functions are characterized by discontinuities or discontinuous derivatives.
The unit step function, denoted u(t), is zero for negative time values and one for positive time values, exhibiting a discontinuity at t=0. This function often represents abrupt changes, such as the step voltage introduced when turning a car's...
The unit step function, denoted u(t), is zero for negative time values and one for positive time values, exhibiting a discontinuity at t=0. This function often represents abrupt changes, such as the step voltage introduced when turning a car's...
214
Second Order systems II
113
In an underdamped second-order system, where the damping ratio ζ is between 0 and 1, a unit-step input results in a transfer function that, when transformed using the inverse Laplace method, reveals the output response. The output exhibits a damped sinusoidal oscillation, and the difference between the input and output is termed the error signal. This error signal also demonstrates damped oscillatory behavior. Eventually, as the system reaches a steady state, the error diminishes to zero.
113


