Period adaptation of real-time control tasks with fixed-priority scheduling in cyber-physical systems

Dai, Xiaotian; Burns, Alan

doi:10.1016/j.sysarc.2019.101691

Cited by 25 publications

(13 citation statements)

References 7 publications

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“…Generally, the increase of control period will reduce the controller performances such as response and stabilization time. Relative literatures have given detailed theory demonstrations, which we also verified during our research [40,41]. Thus, we choose the minimum control horizon which is also an ideal situation to apply to our simulation.…”

Section: Simulationmentioning

confidence: 84%

Dual Quaternion Based Close Proximity Operation for In-Orbit Assembly via Model Predictive Control

Sun

Xiao

Sun

et al. 2021

International Journal of Aerospace Engineering

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This paper studies the problem of guidance and control for autonomous in-orbit assembly. A six-degree-of-freedom (6-DOF) motion control for in-orbit assembly close proximity operation between a service satellite and a target satellite is addressed in detail. The dynamics based on dual quaternion are introduced to dispose the coupling effect between translation and rotation in a succinct frame, in which relevant perturbation and disturbance are involved. With the consideration of economical principle for fuel consume, a generic control system based on model predictive control (MPC) is then designed to generate a suboptimal control sequence for rendezvous trajectory considering actuator output saturation. The stability and robustness issues of the MPC-based control system are analyzed and proved. Numerical simulations are presented to demonstrate the effectiveness and robustness of the proposed control scheme, while additional comparisons for diverse horizons of the MPC are further conducted.

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Section: Simulationmentioning

confidence: 84%

Dual Quaternion Based Close Proximity Operation for In-Orbit Assembly via Model Predictive Control

Sun

Xiao

Sun

et al. 2021

International Journal of Aerospace Engineering

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“…To evaluate the proposed co-design method, experiments are implemented in MATLAB (R2019b) and are running on a desktop PC. The experiment scripts and data can be publicly accessed 6 • To demonstrate the feasibility of the proposed method, we evaluate our approach on synthetically generated packets using UUnifast [10]. The network transmission speed vis 100 Mbps.…”

Section: Discussionmentioning

confidence: 99%

“…The network transmission speed vis 100 Mbps. The greatest 6 Toe MA1LAB code used in the experiments can be accessed at the following link:…”

Section: Discussionmentioning

confidence: 99%

“…x(t) = Ax(t) + Bu(t), y(t) = Hx(t) (6) in which A, B and H are system matrices that represent the system physical properties; x(t) is the system state(s); y(t) is the system output(s) and u(t) is the control input(s). Assuming the sampling time is T5 and the sensor-to-actuator delay is within one sampling period, at discrete time instant k, the system dynamics evolve with the following equations:…”

Section: Control Modelmentioning

confidence: 99%

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Fixed-priority scheduling and controller co-design for time-sensitive networks

Dai

Zhao

Jiang

et al. 2020

Proceedings of the 39th International Conference on Computer-Aided Design

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“…It is also understood that a high confidence in the modelling does not (and should not) lead to a high confidence in decision making, as the former is often dependant on assumptions that are not always true. It is thus considered by the authors how to reduce this problem by introducing feedback based on the difference between the collected data trace from the real system and the model output (following C4), as earlier explored in [17].…”

Section: E C5 -Robust Decision Making In the Presence Of Inaccuraciesmentioning

confidence: 99%

Brief Industry Paper: Digital Twin for Dependable Multi-Core Real-Time Systems — Requirements and Open Challenges

Dai

Zhao

Bate

et al. 2021

2021 IEEE 27th Real-Time and Embedded Technology and Applications Symposium (RTAS)

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Development of dependable multi-/many-core systems requires assurance that the system is operable in a range of conditions, subjected to both functional and non-functional requirements. To achieve this, tools need to be implemented that can enable exploration of design options and be able to detect deficiencies earlier to avoid costly system re-design. In this work we discuss the challenges of design of multi-core realtime systems with timing assurance and discuss what are the requirements for modelling, testing and analysis tools. Digital Twin-based predictive modelling and fast design space evaluation are studied that work toward addressing these challenges.

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Period adaptation of real-time control tasks with fixed-priority scheduling in cyber-physical systems

Cited by 25 publications

References 7 publications

Dual Quaternion Based Close Proximity Operation for In-Orbit Assembly via Model Predictive Control

Dual Quaternion Based Close Proximity Operation for In-Orbit Assembly via Model Predictive Control

Fixed-priority scheduling and controller co-design for time-sensitive networks

Brief Industry Paper: Digital Twin for Dependable Multi-Core Real-Time Systems — Requirements and Open Challenges

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