Adaptive sampling rate control for networked systems based on statistical characteristics of packet disordering

Li, Jinna; Er, Meng Hwa; Tan, Yen-Kheng; Huang, Yu; Zeng, Peng

doi:10.1016/j.isatra.2015.04.005

Cited by 9 publications

(8 citation statements)

References 32 publications

(74 reference statements)

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“…This work ranges from relatively simple first-order hold interpolators to be used in intelligent actuators (e.g., [22]) through to advanced techniques based upon H ∞ filtering of the data stream, application of adaptive sampling controls, and the use of buffering schemes within a robust control framework (e.g., [23,24]). In [23], the use of playback buffers in conjunction with information redundancy is suggested to overcome packet losses, packet disordering and variable latency of UDP/IP communication links in a closed loop.…”

Section: Packet Loss Compensationmentioning

confidence: 99%

“…A frequency-domain robust control method is proposed to overcome the additional link delays and provide additional resilience to occasions in which buffer sizes are violated at run-time. In [24], Li et al consider an adaptive sampling rate control scheme for a DCS subject to stochastic packet disordering, transmission delays and packet losses of the type induced by the UDP/IP protocol. They propose an augmented closed-loop DCS and develop an adaptive tracking controller to stabilize the resulting stochastic system.…”

Section: Packet Loss Compensationmentioning

confidence: 99%

“…They propose an augmented closed-loop DCS and develop an adaptive tracking controller to stabilize the resulting stochastic system. The implementation of such techniques can be non-trivial, and both [23] and [24]-plus closely related methods-require a high-fidelity process model plus knowledge of the network characteristics such as delays and losses. The work in [23] requires the solution to a large non-convex optimization problem, obtained by sweeping the frequency parameter over a specified range using a given search granularity.…”

Section: Packet Loss Compensationmentioning

confidence: 99%

“…Although principally aimed at off-line control design, it may be adapted for on-line use. In [24], multiple consecutive losses are included in the model, and a non-linear search is required to be carried out on-line. No discussion of complexity is provided.…”

Section: Packet Loss Compensationmentioning

confidence: 99%

“…In this case study, a servomotor was chosen as the process to control; this is a common choice for evaluating DCS performance [24]. The continuous-time dynamics relating the shaft speed to the armature voltage of the servomotor can be described by the transfer function:…”

Section: Experimental Designmentioning

confidence: 99%

See 4 more Smart Citations

Dependable Control for Wireless Distributed Control Systems

2015

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Abstract:The use of wireless communications for real-time control applications poses several problems related to the comparatively low reliability of the communication channels. This paper is concerned with adaptive and predictive application-level strategies for ameliorating the effects of packet losses and burst errors in industrial sampled-data Distributed Control Systems (DCSs), which are implemented via one or more wireless and/or wired links, possibly spanning multiple hops. The paper describes an adaptive compensator that reconstructs the best estimates (in a least squares sense) of a sequence of one or more missing sensor node data packets in the controller node. At each sample time, the controller node calculates the current control, and a prediction of future controls to apply over a short time horizon; these controls are forwarded to the actuator node every sample time step. A simple design method for a digital Proportional Integral Derivative (PID)-like adaptive controller is also described for use in the controller node. Together these mechanisms give robustness to packet losses around the control loop; in addition, the majority of the computational overhead resides in the controller node. An implementation of the proposed techniques is applied to a case study using a Hardware in the Loop (HIL) test facility, and favorable results (in terms of both performance and computational overheads) are found when compared to an existing robust control method for a DCS experiencing artificially induced burst errors.

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Section: Packet Loss Compensationmentioning

confidence: 99%

Section: Packet Loss Compensationmentioning

confidence: 99%

Section: Packet Loss Compensationmentioning

confidence: 99%

Section: Packet Loss Compensationmentioning

confidence: 99%

Section: Experimental Designmentioning

confidence: 99%

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Dependable Control for Wireless Distributed Control Systems

2015

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Decentralized dynamic event‐triggered control for networked control systems under unreliable communication network and actuator saturation

Yang

Shen

Chen

et al. 2022

Asian Journal of Control

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In this paper, the stochastic stability of networked control systems (NCSs) with nonlinear perturbation and parameter uncertainties is studied. A decentralized dynamic event triggering scheme (DDETS) is introduced to reduce energy consumption and network transmission burden. Each channel can decide whether to transmit signals sampled by corresponding sensors through this mechanism. Due to the unreliability of communication network, a new mathematical model of NCSs based on multi‐channel fading and hybrid cyber attacks is established, and the actuator is constrained by saturation. A sufficient condition for stochastic stability based on static controller is derived through Lyapunov stability theory, and two numerical examples are given to demonstrate the effectiveness of the method.

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Network‐based integral sliding mode control for descriptor systems with event‐triggered sampling scheme

Wang

Zhang

Ren

et al. 2019

Intl J Robust & Nonlinear

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Summary This paper investigates event‐triggered sliding mode control for descriptor systems subject to networked‐induced delay. For handling disturbance and saving data transmission in networks for descriptor systems, sliding model control and event‐triggered control are combined, whereas how to combine them to design a stable controller is challenging due to the complexity of descriptor systems. Firstly, a new discrete event‐triggered scheme is introduced for deciding whether sampled data is sent out or not for networked‐based descriptor systems. Secondly, integral‐type switching surface and event‐triggered scheme are integrated resulting in a novel time‐delay system. The existence condition of integral‐type switching surface and the stability condition of the sliding mode dynamic are presented. An event‐triggered sliding mode controller is derived for driving the closed‐loop system trajectories to the practical switching surface in finite time. Finally, two examples are employed to show the effectiveness and advantages of the proposed method.

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Adaptive sampling rate control for networked systems based on statistical characteristics of packet disordering

Cited by 9 publications

References 32 publications

Dependable Control for Wireless Distributed Control Systems

Dependable Control for Wireless Distributed Control Systems

Decentralized dynamic event‐triggered control for networked control systems under unreliable communication network and actuator saturation

Network‐based integral sliding mode control for descriptor systems with event‐triggered sampling scheme

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