The quadratic optimal control problem for linear time-delay singularly perturbed systems is investigated via successive approximation approach (SAA) in this paper. Based on singular perturbation theory, the system is decomposed into two subsystems of a slow-time scale and a fast-time scale. The slow-time scale time-delay optimal control problem is transformed first into a sequence of nonhomogen...

This paper will discuss the compensation of first order lag plus time delay (FOLPD) processes using PI and PID controllers whose parameters are specified using appropriate tuning rules. The gain margin, phase margin and maximum sensitivity of the compensated system as the ratio of time delay to time constant of the process varies, are used as ways of judging the performance and robustness of th...

With the integration of communication networks and distributed control in modern manufacturing and process industries, networked control systems (NCSs) are becoming increasingly important due to its simplicity, scalability, flexibility, and cost effectiveness. However, there are still significant technical barriers that limit the applications of NCS technologies. Two challenges are network-indu...

In the context of Networked Control Systems (NCS), communication time delays strongly influence on the Quality of Control (QoC) of process control applications. The goal of this paper is to propose a way to calculate the closed-loop communication time delay and we compensate this time delay using the pole placement design method in order to improve the QoC for CAN-based NCSs. We consider severa...

In networked control systems with multi-step delay, long time-delay causes vacant sampling and controller design difficulty. In order to solve the above problems, comprehensive control methods are proposed in this paper. Time-delay compensation control and linear-quadratic-Guassian (LQG) optimal control are adopted and the systems switch different controllers between two different states. LQG o...

In this paper a design of an observer for Lipschitz nonlinear systems in the presence of time-varying delay in outputs measurements is proposed. The structure of the proposed observer is based on the presence of a proportional integral term which permits the compensation of delay in the measurements outputs. The observer gain is a function of the maximum bound of the delay, the parameters of th...

In a flight controller, latency can be defined as the time delay between when the sensor data is collected and the corresponding control command is executed. Latency exists in all real world systems. Although its effects can be negligible under certain operating conditions, the time delay in a system can ultimately create an upper limit on the performance of a controller. The latency problem ha...

Abstract In order to evaluate the attitude accuracy of TT&C’s SINS under dynamic condition, a new method using theodolite’s observation data fixed star SINS’s based on time-delay compensation is proposed. The detailed design given, and influence time delay analyzed real experiments. analysis experimental results shows that can improve computation accuracy, it valuable for engineering applic...