This paper reviews the development of fuzzy systems and the problem of time delay control in nonlinear systems. Based on this review, a fuzzy Lyapunov method defined in fuzzy blending quadratic Lyapunov functions is proposed from which to derive stability conditions. In the controller procedure, a parallel distributed compensation (PDC) scheme is utilized to construct a global fuzzy logic contr...

Control of systems where the information between the controller, actuator, and sensor can be lost or delayed can be challenging with respect to stability and performance. One way to overcome the resulting problems is the use of prediction based compensation schemes. Instead of a single input, a sequence of (predicted) future controls is submitted and implemented at the actuator. If suitable, so...

−− This paper proposes a stable control structure for bilateral teleoperation of mobile robots. The proposed control structure includes a time-delay compensation placed on both the local and remote sites of the teleoperation system. Teleoperation experiments through a simulated and real (using Internet) communication channel are presented to illustrate the performance and stability of the propo...

Motor dynamics in antagonistic variable stiffness actuator (AVSA) is generally disregarded control system design. This ignorance can lead to an inaccurate model, affecting the performance of closed-loop system. The motor be modeled as input-delay model. In this paper, input time-delay for AVSA first time. a nonlinear function states; thus, tracking challenging task. Specifically, many existing ...

Recent interest in networked control systems (NCS) has instigated research in both communication networks and control. Analysis of NCSs has usually been performed from either the network or the control point of view, but not many papers exist where the analysis of both is done in the same context. In this paper an overall analysis of the networked control system is presented. First, the procedu...

AIM Delay in the diagnosis of colorectal cancer (CRC) may have important clinical and medico-legal implications. This study identifies the claims made on the basis of delay in the diagnosis of CRC to the Swedish insurance agency (whose English name is The County Council´s Mutual Insurance Company) and the impact and consequences of the delay on prognosis, treatment and survival for patients who...

Optimal tracking control (OTC) for discrete time-delay systems affected by persistent disturbances with quadratic performance indexes is considered. Optimal tracking controller is designed based on a sensitivity approximation approach. By introducing a sensitivity parameter, we transform the original OTC problem into a series of difference equations without time-advance on time-delay terms. The...

Considering the problems of model uncertainties, higher harmonics, uncertain boundary conditions, external excitations, and system time delay in practical vibration control system, a novel active method is proposed to suppress thin plate structure with acceleration sensor piezoelectric bimorph actuator this paper. First, nonlinear extended state observer (NESO)-based controller designed ensure ...

Time delay is pervasive in neural information processing. To achieve real-time tracking, it is critical to compensate the transmission and processing delays in a neural system. In the present study we show that dynamical synapses with shortterm depression can enhance the mobility of a continuous attractor network to the extent that the system tracks time-varying stimuli in a timely manner. The ...

Two control laws, to control the liquid pressure of an agricultural spray boom are presented and compared. Characteristic for the process is a dead zone and a time varying delay. The first control law is rather intuitive and is based on direct dead zone compensation and a pole placement idea. The other control law originates from sliding mode control where the continuous part of the control con...