For a class of nonlinear systems with pure time delay in the input signal, by selecting the accumulated output error in a data window to form the fitness function, and by adopting the decimal coding technique, an online estimation approach based on genetic algorithm to time varying time delay of nonlinear systems is proposed. This approach has definite robustness against system noise.
A new design method of digital PII robust adjusting controller for a general process control system with large time varying time delay is developed by studying its properties.
By means of this digital robust controller the closed loop system will enjoy both robust stability for the large time varying time delay and complete set point load disturbance rejection.
Aiming at the system which has several complicate characteristics such as time varying time delay and load disturbance, designs of a digital double PI controller is presented based on the method of robust digital PID control with the two degrees of freedom internal model control (IMC) structure.
For a class of uncertain time varying time delay linear systems which do not satisfy the matching conditions, a new adaptive variable structure control strategy is proposed based on Lyapunov stability theorem.
针对一类带有不匹配时变不确定性和时滞的线性系统 ,基于 L yapunov稳定性定理 ,提出了一种新的自适应变结构控制策略 .
In this paper,a criteria on the delay independent asymptotic stability is given in the form of algebraic Riccati inequality for linear time varying time delay systems with multi state delay and then a stabilizing method is presented with the memoryless state feedback for this time delay systems. A robust stabilizing method is presented also derived for the uncertain time delay systems with time varying multi state delay and...
In this paper,a criteria on the delay independent asymptotic stability is given in the form of algebraic Riccati inequality for linear time varying time delay systems with multi state delay and then a stabilizing method is presented with the memoryless state feedback for this time delay systems. A robust stabilizing method is presented also derived for the uncertain time delay systems with time varying multi state delay and time varying unknown but bounded uncertain parameters.The results are very simple since only an algebraic Riccati equation need to be solved. At last, a numerical example is given to check the results.
A new approach to on-line adaptive estimation of time-varying time delay is proposed. First, a modifiedstrong tracking filter algorithm is prasented,and an estimation model for the time-varying time delay is set up. Based on thismodel , the time-varying time delay can be directly estimated by the modified strong tracking filter algorithm. The proposedappoach is characterized by easy implementation, rapid tracking, high accuracy and etc....
A new approach to on-line adaptive estimation of time-varying time delay is proposed. First, a modifiedstrong tracking filter algorithm is prasented,and an estimation model for the time-varying time delay is set up. Based on thismodel , the time-varying time delay can be directly estimated by the modified strong tracking filter algorithm. The proposedappoach is characterized by easy implementation, rapid tracking, high accuracy and etc. Finally, simulated experimental resultsare provided to show the effectiveness of the proposed approach.
For a class of nonlinear systems with pure time delay in the input signal, by selecting the accumulated output error in a data window to form the fitness function, and by adopting the decimal coding technique, an online estimation approach based on genetic algorithm to time varying time delay of nonlinear systems is proposed. This approach has definite robustness against system noise. The simulation results demonstrated the effectiveness of the proposed approach.
time varying time delay
时变时滞
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