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Related Concept Videos

Linear time-invariant Systems01:23

Linear time-invariant Systems

258
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...
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BIBO stability of continuous and discrete -time systems01:24

BIBO stability of continuous and discrete -time systems

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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....
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Power System Distribution01:25

Power System Distribution

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Power system distribution involves delivering electrical energy from power plants to consumers through a network of transmission and distribution systems. The process begins at power plants, where energy from coal, gas, nuclear, water, and wind is converted into electrical energy. These plants use three-phase generators, typically rated between 50 to 1300 MVA, with terminal voltages ranging from a few kV to 20 kV, depending on the size and age of the units.
The transmission system is designed...
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Multimachine Stability01:25

Multimachine Stability

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Multimachine stability analysis is crucial for understanding the dynamics and stability of power systems with multiple synchronous machines. The objective is to solve the swing equations for a network of M machines connected to an N-bus power system.
In analyzing the system, the nodal equations represent the relationship between bus voltages, machine voltages, and machine currents. The nodal equation is given by:
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Multiple Voltage Sources01:25

Multiple Voltage Sources

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Generally, a single battery is not enough to power some devices. In such cases, batteries can be combined in two ways: in series or in parallel.
In series, the positive terminal of one battery is connected to the negative terminal of another battery. Hence, the voltage of each battery is added to give the net voltage, which is increased because each battery boosts the electrons that enter it. The same current flows through each battery because they are connected in series.
Batteries are...
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Time-Domain Interpretation of PD Control01:07

Time-Domain Interpretation of PD Control

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Proportional-Derivative (PD) control is a widely used control method in various engineering systems to enhance stability and performance. In a system with only proportional control, common issues include high maximum overshoot and oscillation, observed in both the error signal and its rate of change. This behavior can be divided into three distinct phases: initial overshoot, subsequent undershoot, and gradual stabilization.
Consider the example of control of motor torque. Initially, a positive...
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Multi-Source Common-View Disciplined Clock: A Fail-Safe Clock for Critical Infrastructure Systems.

Michael A Lombardi1

  • 1National Institute of Standards and Technology, Boulder, CO 80305, USA.

Journal of Research of the National Institute of Standards and Technology
|March 12, 2024
PubMed
Summary
This summary is machine-generated.

NIST developed the multi-source common-view disciplined clock (MSCVDC) for critical timing systems. This invention offers enhanced reliability, security, and fail-safe performance for infrastructure needs.

Keywords:
Coordinated Universal Timecritical infrastructure systemssynchronizationtime transfer

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Area of Science:

  • Metrology and Timing Systems
  • Critical Infrastructure Protection
  • Advanced Clock Synchronization

Background:

  • Existing timing systems face challenges in accuracy and fail-safe operation.
  • Critical infrastructure relies heavily on precise and dependable timekeeping.
  • The need for robust, verifiable clock solutions is paramount.

Purpose of the Study:

  • Introduce the novel multi-source common-view disciplined clock (MSCVDC).
  • Provide a comprehensive technical overview of the MSCVDC's functionality.
  • Evaluate the MSCVDC's suitability for critical infrastructure timing.

Main Methods:

  • Detailed technical description of the MSCVDC architecture.
  • Analysis of reliability, redundancy, and security features.
  • Performance evaluation under various operational scenarios.

Main Results:

  • The MSCVDC demonstrates high accuracy and fail-safe capabilities.
  • Robust design ensures reliability and redundancy for critical applications.
  • Security features are integrated to protect timing integrity.

Conclusions:

  • The MSCVDC is a promising NIST invention for critical infrastructure timing.
  • It offers a verifiably accurate and fail-safe clock solution.
  • Commercial viability and future product development are discussed.