Dynamic Emulation Using an Indirect Control Input
Dynamic Emulation Using an Indirect Control Input
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使用间接控制输入的动态仿真
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
A. Alleyne
中科院分区：
文献类型：
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作者：
Rong Zhang;A. Alleyne
本文提出了一个通用框架来分析和设计一类动态仿真系统的控制器。此类系统具有一些结构上独特的控制框架，这些框架本质上限制了动态仿真的可用带宽。主要关注点是我们定义为间接的控制结构。这意味着来自控制器的信号不会直接影响物理设备；它与其他外源信号相互作用，以影响与模拟负载交互的物理系统的行为。结果表明，可实现的闭环性能以一种独特的方式受到限制：受控闭环系统的高频响应收敛于与仿真负载相互作用的开环物理设备的动态。本文说明了间接仿真的三种控制器配置，并给出了如何在已确定的结构限制内提高性能的指南。这三种配置是：仅测量设备输出的反馈设计、测量外源信号的前馈设计以及结合反馈和前馈测量的二自由度设计。频域中的详细分析用于支持硬件在环 (HIL) 系统上所示的实验结果。演示案例是一个高带宽瞬态测功机，用于模拟与土方车辆动力系统相关的快速变化的负载。
This paper presents a generalized framework to analyze and design controllers for a class of dynamic emulation systems. This class of systems features some structurally distinctive control frameworks which inherently limit the available bandwidth for dynamic emulation. The primary focus is on control structures that we define as indirect. This means the signal from the controller does not affect the physical plant directly; it interacts in combination with other exogenous signals to affect a behavior on the physical system interacting with the emulated load. It is shown that the achievable closed-loop performance is limited in a unique way: the high-frequency response of the controlled closed-loop system converges to the dynamics of the open-loop physical plant that is interacting with the emulated load. This paper illustrates the three controller configurations of the indirect emulation and gives guidelines on how to improve the performance within the identified structural limitations. The three configurations are: a feedback design measuring plant output only, a feedforward design measuring an exogenous signal, and a two degree-of-freedom design combining feedback and feedforward measurements. A detailed analysis in the frequency domain is used to support the experimental results illustrated on a Hardware-in-the-Loop (HIL) system. The demonstration case is a high-bandwidth transient dynamometer to emulate rapidly varying loads associated with an earthmoving vehicle powertrain.