时延网络控制系统的保性能控制研究

针对网络控制系统中存在的不确定时延，在传感器采用时间驱动，执行器与控制器采用事件驱动、时延小于一个采样周期的条件下，将网络控制系统建模为一类具有不确定性的线性离散系统并且其标称模型可控。围绕该标称模型，利用Lyapunov方法，基于相应的LMI可行解，给出网络控制系统保性能控制律的设计方法。通过仿真证明了该方法的有效性。     

Technical Note: Force Control in Electrohydraulic Active Suspensions Revisited

The inner loop control for the actuator force can be quite simply compensated by means of a correction term to the desired force signal at the input. The correction requires only a measurement of the actuator piston velocity and is employed to cancel the loop disturbance caused by the oil flow to the actuator. Although an additional time constant is introduced by the integration in the inner loop force control, the overall performance is nevertheless quite close to that of an ideal optimal system.     

Design of rollover prevention controller with linear matrix inequality-based trajectory sensitivity minimisation

This paper presents a method to design a rollover prevention controller for vehicle systems. The vehicle rollover can be prevented by a controller that minimises the lateral acceleration and the roll angle. Rollover prevention capability can be enhanced if the controlled vehicle system is robust to the variation of the height of the centre of gravity and the speed of the vehicle. For this purpose, a robust controller is designed with linear matrix inequality-based trajectory sensitivity minimisation. Differential braking and active suspension are adopted as actuators that generate yaw and roll moments, respectively. The newly proposed method is shown to be effective in preventing rollover by the simulation on a non-linear multibody dynamic simulation software, CarSim^®.     

关联时滞大系统的保性能控制

针对关联项具有N×N个任意未知常时滞的线性连续大系统,采用线性矩阵不等式(LMIs)方法,提出了一种分散的无记忆状态反馈二次保性能控制器的存在条件和设计方法.最后用一个示例说明分散无记忆状态反馈二次保性能控制器的设计方法.     

不确定性时滞系统时滞相关鲁棒镇定

讨论了具有状态时滞的数值界不确定性线性系统的时滞相关鲁棒控制问题.将矩阵分解的思想应用于线性时滞系统的控制综合,利用Lyapunov-Krasovskii泛函方法,通过牛顿-莱布尼茨各项相互关系引入"0"阵,得到了系统的一种新的经过状态反馈控制后可鲁棒镇定的、基于LMI的、保守性较低的时滞相关条件.该方法既不需要对原系统进行模型变换,也不需要对交叉项进行界定.用算例说明了该方法的有效性.     

DESIGN OF A NEW INTERPOLATED CONTROLLER FOR STABILIZATION OF A SET OF INTERPOLATED PLANTS

IntroductionDynamics of almost all plants in reality variesaccording to the condition under which the plantis operated.An idea to describe the variation ofplant dynamics is interpolating a number of rep-resentative models defined at representative op-erating points.In Ref. [1 ] ,the plant was as-sumed to described as a linear interpolation ofproper stable coprime factorizations of transferfunctions of two representative models and thestabilization problems have been considered. InRef.[2 ] ,it…     

基于拟T-S模糊模型的网络化控制系统稳定性分析

综合考虑网络化控制系统（NCS）出现时延和丢包问题,提出一种基于拟T-S模糊模型.以时延和丢包出现的概率作为隶属度,并根据丢包出现在系统中的不同环节,分别构造相应的系统模型,再利用线性矩阵不等式（LMI）方法证明系统的稳定性,并通过对一个二阶倒立摆系统的数值分析说明方法的可行性,从而为网络化控制系统的分析与设计提供了新方法.     

A novel approach to design robust fault detection filter for networked control systems

In this paper, an approach for designing robust fault detection filter (RFDF) of networked control systems (NCSs) with unknown inputs is studied. The design aims at implementing the optimal trade-off between robustness of unknown inputs (including the item produced by networked-induced delay) and sensitivity of fault. The key design issue is to introduce an optimal fault detection filter based on NCSs with the control law compensation as the reference residual model of NCSs and to formulate the RFDF design as a model-matching problem. By applying H _∞ optimization technique, linear matrix inequality (LMI) approach is given to solve the model-matching problem. The validity of the proposed approach is shown by a numerical example.      

考虑输入滞后的磁悬浮列车悬浮系统的鲁棒H_∞容错控制

以磁悬浮列车单模块悬浮系统为对象,考虑系统存在的输入时滞,建立了时滞悬浮系统的数学模型,基于状态反馈和线性矩阵不等式处理方法,设计了在执行器发生故障情况下的鲁棒H∞容错控制器,在此基础上,针对不同执行器故障模式,对悬浮间隙的变化情况进行了仿真。仿真结果表明所设计的控制器在执行器故障条件下能够使磁悬浮列车稳定悬浮与运行。     

关联时滞大系统的保性能控制

针对关联项具有N×N个任意未知常时滞的线性连续大系统,采用线性矩阵不等式(LM Is)方法,提出了一种分散的无记忆状态反馈二次保性能控制器的存在条件和设计方法.最后用一个示例说明分散无记忆状态反馈二次保性能控制器的设计方法.