Tongwen Chen
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View article: A Unified Alternating Optimization Framework for Joint Sensor and Actuator Configuration in LQG Systems
A Unified Alternating Optimization Framework for Joint Sensor and Actuator Configuration in LQG Systems Open
This paper fills a gap in the literature by considering a joint sensor and actuator configuration problem under the linear quadratic Gaussian (LQG) performance without assuming a predefined set of candidate components. Different from the e…
View article: Research on an Ice Tolerance Control Method for Large Aircraft Based on Adaptive Dynamic Inversion
Research on an Ice Tolerance Control Method for Large Aircraft Based on Adaptive Dynamic Inversion Open
Considering the effect of icing on aircraft control performance, this paper proposes an adaptive dynamic inverse ice tolerance control method based on piecewise constant. A control allocation algorithm is introduced to compensate for the c…
View article: Ductility and fracture behavior of cold spray additive manufactured zinc
Ductility and fracture behavior of cold spray additive manufactured zinc Open
Tailoring part strength and ductility in additive manufacturing or repair is vital to successful applications. Therefore, applying cold spray as a deposition technique must be tuned for maximum amounts of well-bonded internal interfaces an…
View article: Periodic event-based robust output regulation for a class of uncertain linear systems with inter-event analysis
Periodic event-based robust output regulation for a class of uncertain linear systems with inter-event analysis Open
This paper investigates the robust output regulation problem of uncertain linear systems by using a periodic event-triggered controller. A new type of event triggers based on local sampled signals is proposed to monitor events. An event de…
View article: ASPR-based Output Feedback Control with Virtual PFC for Output Tracking
ASPR-based Output Feedback Control with Virtual PFC for Output Tracking Open
Nowadays, the output feedback control method based on the Almost Strictly Positive Real (ASPR) property gets many attentions and has been researched widely. ASPR models can be stabilized by applying simple output feedback control; so the d…
View article: Application of Alarm Correlations in Root Cause Diagnosis of Plant-wide Oscillations*
Application of Alarm Correlations in Root Cause Diagnosis of Plant-wide Oscillations* Open
Plant-wide oscillations are common types of disturbances in industrial processes, whose effects propagate to multiple process units through material and/or information flow paths. Such oscillations cause poor controller performance and thu…
View article: Event-Triggered Consensus of Nonlinear Agents with Quantized Broadcasts: A Hybrid System Approach
Event-Triggered Consensus of Nonlinear Agents with Quantized Broadcasts: A Hybrid System Approach Open
Information exchange among agents operating over a network, in practice, is restrained by limited communication bandwidth; this concern is often addressed by employing quantized broadcasts. In this paper, we study the problem of consensus …
View article: Distributed State Estimation for Linear Time-invariant Systems with Aperiodic Sampled Measurement
Distributed State Estimation for Linear Time-invariant Systems with Aperiodic Sampled Measurement Open
This paper deals with the state estimation of linear time-invariant systems using distributed observers with local sampled-data measurement and aperiodic communication. Each observer agent perceives partial information of the system to be …
View article: Event-triggered Observability: A Set-membership Perspective
Event-triggered Observability: A Set-membership Perspective Open
This work attempts to discuss the observability of linear time-invariant systems with event-triggered measurements. A new notion of observability, namely, $ε$-observability is defined with parameter $ε$, which relates to the worst-case per…
View article: Deception attacks on Kalman filtering with interval estimation performance loss
Deception attacks on Kalman filtering with interval estimation performance loss Open
This paper studies the problem of optimal deception attacks against remote state estimation, where the measurement data is transmitted through an unreliable wireless channel. A malicious agent is capable of intercepting and modifying raw d…
View article: Event-Triggered Robust Distributed MPC for Multi-Agent Systems with A Two-Step Event Verification
Event-Triggered Robust Distributed MPC for Multi-Agent Systems with A Two-Step Event Verification Open
An event-triggered robust distributed model predictive control (MPC) problem for multi-agent systems with bounded disturbances is studied in this paper. For each agent, a two-step triggering scheme is designed to decide when to solve its i…
View article: Periodic event-triggered networked control systems subject to large transmission delays
Periodic event-triggered networked control systems subject to large transmission delays Open
This paper studies periodic event-triggered networked control for nonlinear systems, where the plants and controllers are connected by multiple independent communication channels. Several network-induced imperfections are considered simult…
View article: Distributed Time- and Event-Triggered Observers for Linear Systems: Non-Pathological Sampling and Inter-Event Dynamics
Distributed Time- and Event-Triggered Observers for Linear Systems: Non-Pathological Sampling and Inter-Event Dynamics Open
For an autonomous linear time-invariant (LTI) system, a distributed observer with time-triggered periodic observations and event-triggered communication is proposed to estimate the state of the system. It is shown that the sampling period …
View article: Cooperative Output Regulation with Mixed Time- and Event-triggered Observers.
Cooperative Output Regulation with Mixed Time- and Event-triggered Observers. Open
Mixed time- and event-triggered cooperative output regulation for heterogeneous distributed systems is investigated in this paper. A distributed observer with time-triggered observations is proposed to estimate the state of the leader, and…
View article: Performance Assessment and Design of Quadratic Alarm Filters
Performance Assessment and Design of Quadratic Alarm Filters Open
Alarm filtering is a structurally simple, easy to implement, and effective method to improve industrial alarm systems. Owing to these advantages, alarm filters are widely used in industrial applications. Linear and quadratic are the main t…
View article: Affine Formation Maneuver Control of Event-triggered Multi-agent Systems
Affine Formation Maneuver Control of Event-triggered Multi-agent Systems Open
An event-triggered affine formation maneuver control problem is studied in this work. The formations are invariant for any affine transformation. An event-triggered mechanism is proposed for the closed-loop system under which the controlle…
View article: Dynamic periodic event-triggered control for nonlinear plants with state feedback
Dynamic periodic event-triggered control for nonlinear plants with state feedback Open
In this work, we propose two methods to design a dynamic periodic event-triggered controller that stabilizes nonlinear plants using static state feedback. The design methodology begins by assuming the knowledge of a continuous-time state-f…
View article: Secure Analysis of Dynamic Networks under Pinning Attacks against Synchronization
Secure Analysis of Dynamic Networks under Pinning Attacks against Synchronization Open
In this paper, we first consider a pinning node selection and control gain co-design problem for complex networks. A necessary and sufficient condition for the synchronization of the pinning controlled networks at a homogeneous state is pr…
View article: Extraction and Graphical Representation of Operator Responses to Multivariate Alarms in Industrial Facilities
Extraction and Graphical Representation of Operator Responses to Multivariate Alarms in Industrial Facilities Open
Expert knowledge is an important factor to achieve operational effectiveness. This work focuses on mining such knowledge on operator responses to alarms, and examining the relations between the responses and alarms from the historical Alar…
View article: Cause and Effect Analysis for Decision Support in Alarm Floods
Cause and Effect Analysis for Decision Support in Alarm Floods Open
The presence of faults in large-scale facilities, quite frequently propagates plant-wide due to energy integration and consequently triggers a sequence of alarms, which are known as alarm floods. For the purpose of decision support in the …
View article: A Randomized Variance-based Sensor Scheduling for Remote State Estimation
A Randomized Variance-based Sensor Scheduling for Remote State Estimation Open
In this paper, the problem of sensor transmission power schedule for remote state estimation is studied. A sensor sends its local state estimate to a remote estimator through an unreliable wireless channel where packet dropouts may occur. …
View article: Process Discovery of Operator Actions in Response to Univariate Alarms**This work was supported by the Natural Sciences and Engineering Research Council of Canada via the CRD program.
Process Discovery of Operator Actions in Response to Univariate Alarms**This work was supported by the Natural Sciences and Engineering Research Council of Canada via the CRD program. Open
To capture the experience of skilled operators in response to alarm notifications, a systematic method of process discovery for operator actions in response to univariate alarms is proposed. The contributions of the paper are two folds. Fi…