LabVIEW＆Matlab在半主动悬挂系统实验台数据采集与控制系统中的应用

利用LabVIEw＆Matlab设计了悬挂系统实验台数据采集与控制系统，实现了LQG（Linear Quadratic Gaussian）最优控制算法下悬挂系统主动／半主动振动控制。在LabVIEW环境下实时采集悬挂系统振动信号，并调用MATLAB Script计算状态反馈增益矩阵、Kalman滤波器的增益矩阵，得出线性二次型Gauss最优控制控制策略下最优控制力、半主动控制力数值；然后将此数值作为伺服信号，通过串口通讯，分别控制车速模拟系统、脉宽调制（PWM）电源进而控制作动器，实现不同车速下悬挂系统主动／半主动振动控制。实验结果表明，应用LabVIEW＆Madab设计的数据采集与控制系统能满足实验需要。

Application of LabVIEW & Matlab in Data Acquisition and Control System for Semi-Active Suspension Test Bed

A testing data acquisition and control system for a semi-active suspension test machine is designed using LabVIEW＆Matlab codes. The Linear Quadratic Gaussian （LQG） optimal control algo- rithms are used to realize the active and semi-active vibration control for the suspension system. In the environment of LabVIEW, the real-time data acquisition of vibration signal of the suspension system is carried out. Employing MATLAB Script, state-feedback-gain matrix and Kalman-filter-gain matrix are calculated. Under the LQG optimal control, the values of optimal control force and semi-active control force are obtained. Finally, these values are transferred to PWM （Pulse-Width Modulation） power supply and actuator through a serial interface. The experimental results show that the data acquisition and control system designed with LabVIEW ＆ Matlab can meet the requirement of testing.