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相关概念视频

Time-Domain Interpretation of PD Control01:07

Time-Domain Interpretation of PD Control

83
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...
83
Second Order systems II01:18

Second Order systems II

87
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.
87
Linear Approximation in Time Domain01:21

Linear Approximation in Time Domain

62
Nonlinear systems often require sophisticated approaches for accurate modeling and analysis, with state-space representation being particularly effective. This method is especially useful for systems where variables and parameters vary with time or operating conditions, such as in a simple pendulum or a translational mechanical system with nonlinear springs.
For a simple pendulum with a mass evenly distributed along its length and the center of mass located at half the pendulum's length,...
62
PD Controller: Design01:26

PD Controller: Design

183
In automotive engineering, car suspension systems often employ Proportional Derivative (PD) controllers to enhance performance. PD controllers are utilized to adjust the damping force in response to road conditions. A controller, acting as an amplifier with a constant gain, demonstrates proportional control, with output directly mirroring input.
Designing a continuous-data controller requires selecting and linking components like adders and integrators, which are fundamental in Proportional,...
183
Feedback control systems01:26

Feedback control systems

281
Feedback control systems are categorized in various ways based on their design, analysis, and signal types.
Linear feedback systems are theoretical models that simplify analysis and design. These systems operate under the principle that their output is directly proportional to their input within certain ranges. For instance, an amplifier in a control system behaves linearly as long as the input signal remains within a specific range. However, most physical systems exhibit inherent nonlinearity...
281
Multi-input and Multi-variable systems01:22

Multi-input and Multi-variable systems

96
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...
96

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相关实验视频

Updated: Jun 4, 2025

Real-Time DC-dynamic Biasing Method for Switching Time Improvement in Severely Underdamped Fringing-field Electrostatic MEMS Actuators
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Real-Time DC-dynamic Biasing Method for Switching Time Improvement in Severely Underdamped Fringing-field Electrostatic MEMS Actuators

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对于具有切换参数的异常扰动系统,基于事件的滑动模式控制.

Changchun Shen1, Jun Cheng2

  • 1School of Data Science and Information Engineering, Guizhou Minzu University, Guizhou 550025, China.

ISA transactions
|January 2, 2025
PubMed
概括

本研究介绍了一种基于记忆的动态事件触发的新型协议,用于异常扰动的交换系统. 这种方法提高了控制性能,并减少了灵活状态转换的通信负载.

科学领域:

  • 控制系统工程 控制系统工程
  • 系统理论 系统理论
  • 应用数学 应用数学 应用数学

背景情况:

  • 具有切换参数的奇异扰动系统带来了独特的控制挑战.
  • 传统的马可维式切换系统假设指数式状态过渡分布,限制了灵活性.
  • 事件触发控制旨在减少复杂系统中的通信负载.

研究的目的:

  • 为具有一般开关参数分布的异常扰动系统开发基于事件的滑动模式控制策略.
  • 提出一种基于内存的动态事件触发协议 (DETP),以提高控制性能和通信效率.
  • 为了确保滑动模式动态在有限干扰下 (EMSUB) 的指数级模式稳定性.

主要方法:

  • 一个基于内存的动态事件触发协议 (DETP),包含一个辅助偏移变量的内存术语.
  • 构建一个整体类型的滑动表面.
  • 采用隐藏的半马科夫交换模型来解决模式不匹配的问题.
  • 利用参数依赖的利亚普诺夫理论来导出稳定性条件.

主要成果:

  • 拟议的基于内存的DETP有效地减少了通信数据包的频率.
  • 控制策略减轻了通信开销,同时保持了控制性能.
关键词:
动态事件触发的协议.集成的滑动模式控制控制器半马科维亚交换系统的交换系统.奇异扰乱系统是一个奇异扰乱系统.

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Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques
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Last Updated: Jun 4, 2025

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Real-Time DC-dynamic Biasing Method for Switching Time Improvement in Severely Underdamped Fringing-field Electrostatic MEMS Actuators

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Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques

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  • 获得了足够的条件,保证了滑动模式动态的EMSUB.
  • 模拟示例验证了拟议的控制战略的有效性.

    • 结论:

    • 新型基于内存的DETP提供了一种有效的解决方案,用于控制异常扰乱的开关系统.
    • 积分型的滑动表面和隐藏的半马科夫模型有效地处理系统的复杂性.
    • 由此产生的稳定性条件为这些系统的控制设计提供了坚实的框架.