Find Research outputs

Search results

• A 3D path-following approach for a multirotor UAV on SO(3)

  Cichella, V., Choe, R., Mehdi, S. B., Xargay, E., Hovakimyan, N., Kaminer, I. & Dobrokhodov, V., Jan 1 2013, In: IFAC Proceedings Volumes (IFAC-PapersOnline). 2, PART 1, p. 13-18 6 p.

  Research output: Contribution to journal › Conference article › peer-review

  • Unmanned aerial vehicles (UAV)
  • Specifications

• A cooperative trajectory generation framework for cluttered environments

  Puig-Navarro, J., Hovakimyan, N. & Allen, B. D., 2019, AIAA Aviation 2019 Forum. American Institute of Aeronautics and Astronautics Inc, AIAA, p. 1-8 8 p. (AIAA Aviation 2019 Forum).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Trajectories
  • Antennas
  • Telecommunication networks
  • Polynomials
  • Actuators

• Active control of visual sensor for navigation and guidance

  Cao, C., Hovakimyan, N. & Evers, J., Jan 2010, In: Computational Management Science. 7, 1, p. 85-110 26 p.

  Research output: Contribution to journal › Article › peer-review

  • Sensor
  • Navigation
  • Aircraft
  • Follower
  • Guidance

• Adaptive vision-based guidance law with guaranteed performance bounds

  Ma, L., Cao, C., Hovakimyan, N., Dobrokhodov, V. & Kaminer, I., 2010, In: Journal of Guidance, Control, and Dynamics. 33, 3, p. 834-852 19 p.

  Research output: Contribution to journal › Article › peer-review

  • Guidance Law
  • Performance Bounds
  • Vision
  • Target
  • vehicle

• A decoupled design in distributed control of uncertain networked control systems

  Wang, X. & Hovakimyan, N., 2012, 2012 American Control Conference, ACC 2012. p. 6497-6502 6 p. 6315597

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Networked control systems
  • Communication
  • Uncertainty
  • Uncertain systems
  • Low pass filters

• Aircraft actuator fault detection and isolation using piecewise constant fault estimation scheme

  Lee, H., Snyder, S., Patterson, A. & Hovakimyan, N., Jan 1 2016, AIAA Guidance, Navigation, and Control Conference. American Institute of Aeronautics and Astronautics Inc, AIAA, (2016 AIAA Guidance, Navigation, and Control Conference).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Fault detection
  • Actuators
  • Aircraft
  • Uncertainty

• Aircraft actuator fault detection and isolation using piecewise constant fault estimation scheme

  Lee, H., Snyder, S., Patterson, A. & Hovakimyan, N., Jan 1 2016, AIAA Guidance, Navigation, and Control Conference. American Institute of Aeronautics and Astronautics Inc, AIAA, (2016 AIAA Guidance, Navigation, and Control Conference).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Fault detection
  • Actuators
  • Aircraft
  • Uncertainty

• A Lyapunov-based approach for Time-Coordinated 3D Path-Following of multiple quadrotors

  Cichella, V., Kaminer, I., Xargay, E., Dobrokhodov, V., Hovakimyan, N., Aguiar, A. P. & Pascoal, A. M., 2012, In: Proceedings of the IEEE Conference on Decision and Control. p. 1776-1781 6 p., 6425933.

  Research output: Contribution to journal › Conference article › peer-review

  • Time varying networks
  • Path Following
  • Unmanned aerial vehicles (UAV)
  • Lyapunov
  • Telecommunication networks

• A Multirate Adaptive Control for MIMO Systems with Application to Cyber-Physical Security

  Jafarnejadsani, H., Lee, H., Hovakimyan, N. & Voulgaris, P., Jan 18 2019, 2018 IEEE Conference on Decision and Control, CDC 2018. Institute of Electrical and Electronics Engineers Inc., p. 6620-6625 6 p. 8619570. (Proceedings of the IEEE Conference on Decision and Control; vol. 2018-December).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Adaptive Control
  • Controller
  • Attack
  • Output
  • Actuator

• An adaptive unknown input observer for fault detection and isolation of aircraft actuator faults

  Lee, H., Snyder, S. & Hovakimyan, N., Feb 28 2014, AIAA Guidance, Navigation, and Control Conference. (AIAA Guidance, Navigation, and Control Conference).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Aircraft models
  • Fault detection
  • Actuators
  • Aircraft

• An L₁ adaptive backup flight control law for transport aircraft with vertical-tail damage

  Sun, D., Choe, R., Xargay, E. & Hovakimyan, N., 2016, AIAA Guidance, Navigation, and Control Conference. American Institute of Aeronautics and Astronautics Inc, AIAA, (2016 AIAA Guidance, Navigation, and Control Conference).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Transport aircraft
  • Aircraft
  • Rudders
  • Aircraft models
  • NASA

• An l₁ adaptive stability augmentation system designed for mil-hdbk-1797 level 1 flying qualities

  Puig-Navarro, J., Ackerman, K. A., Hovakimyan, N., Cotting, M. C., Duke, D. J., Carrera, M. J., McCaskey, N. C., Esposito, D., Peterson, J. M. & Tellefsen, J. R., 2019, AIAA Scitech 2019 Forum. American Institute of Aeronautics and Astronautics Inc, AIAA, (AIAA Scitech 2019 Forum).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Flight control systems
  • System stability
  • Aircraft
  • Hydraulics
  • Degradation

• A path planning framework for a flying robot in close proximity of humans

  Yoon, H. J., Widdowson, C., Marinho, T., Wang, R. F. & Hovakimyan, N., Jul 2019, 2019 American Control Conference, ACC 2019. Institute of Electrical and Electronics Engineers Inc., p. 5254-5259 6 p. 8815168. (Proceedings of the American Control Conference; vol. 2019-July).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Motion planning
  • Robots
  • Hidden Markov models
  • Trajectories
  • Testbeds

• Application of L₁ adaptive controller to wing rock

  Kharisov, E. & Hovakimyan, N., 2010, AIAA Infotech at Aerospace 2010. 2010-3395

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Rocks
  • Controllers
  • Aerospace industry
  • Angle of attack
  • Uncertainty

• A safe cooperative framework for atmospheric science missions with multiple heterogeneous uas using piecewise bezier curves

  Mehdi, S. B., Puig-Navarro, J., Choe, R., Cichella, V., Hovakimyan, N., Chandarana, M., Trujillo, A., Rothhaar, P. M., Tran, L., Neilan, J. H. & Allen Danettett, B., 2016, 16th AIAA Aviation Technology, Integration, and Operations Conference. American Institute of Aeronautics and Astronautics Inc, AIAA, p. 1-14 14 p. (16th AIAA Aviation Technology, Integration, and Operations Conference).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Productivity
  • Trajectories

• Assessing the use of UAV to quantify flow processes in rivers

  Blois, G., Best, J. L., Christensen, K. T., Cichella, V., Donahue, A., Hovakimyan, N., Kennedy, A. & Pakrasi, I., Jan 1 2016, River Flow - Proceedings of the International Conference on Fluvial Hydraulics, RIVER FLOW 2016. Constantinescu, G., Garcia, M. & Hanes, D. (eds.). CRC Press/Balkema, p. 601-607 7 p. (River Flow - Proceedings of the International Conference on Fluvial Hydraulics, RIVER FLOW 2016).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Rivers
  • Unmanned aerial vehicles (UAV)
  • vehicle
  • surface water
  • Water

• Asynchronous task execution in networked control systems using decentralized event-triggering

  Wang, X., Sun, Y. & Hovakimyan, N., Sep 1 2012, In: Systems and Control Letters. 61, 9, p. 936-944 9 p.

  Research output: Contribution to journal › Article › peer-review

  • Networked control systems
  • Communication
  • Data communication systems
  • Scheduling

• A trajectory-generation framework for time-critical cooperative missions

  Choe, R., Cichella, V., Xargay, E., Hovakimyan, N., Trujillo, A. C. & Kaminer, I., 2013.

  Research output: Contribution to conference › Paper › peer-review

  • Trajectories
  • Fixed wings
  • Constrained optimization
  • Unmanned aerial vehicles (UAV)
  • Cost functions

• Attack-resilient Estimation for Linear Discrete-time Stochastic Systems with Input and State Constraints

  Wan, W., Kim, H., Hovakimyan, N. & Voulgaris, P. G., Dec 2019, 2019 IEEE 58th Conference on Decision and Control, CDC 2019. Institute of Electrical and Electronics Engineers Inc., p. 5107-5112 6 p. 9029918. (Proceedings of the IEEE Conference on Decision and Control; vol. 2019-December).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Input Constraints
  • Stochastic systems
  • State Constraints
  • Discrete-time Systems
  • Attack

• A Visibility-Based Pursuit-Evasion Game with a Circular Obstacle

  Bhattacharya, S., Başar, T. & Hovakimyan, N., Dec 1 2016, In: Journal of Optimization Theory and Applications. 171, 3, p. 1071-1082 12 p.

  Research output: Contribution to journal › Article › peer-review

  • Pursuit-evasion Games
  • Evasion
  • Visibility
  • Game
  • Control Policy

• Avoiding multiple collisions through trajectory replanning using piecewise Bézier curves

  Mehdi, S. B., Choe, R. & Hovakimyan, N., Feb 8 2015, 54rd IEEE Conference on Decision and Control,CDC 2015. Institute of Electrical and Electronics Engineers Inc., p. 2755-2760 6 p. 7402633. (Proceedings of the IEEE Conference on Decision and Control; vol. 54rd IEEE Conference on Decision and Control,CDC 2015).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Collision
  • Trajectory
  • Trajectories
  • Curve
  • Vehicle Dynamics

• Bode-like integral for continuous-time closed-loop systems in the presence of limited information

  Li, D. & Hovakimyan, N., Jun 3 2013, In: IEEE Transactions on Automatic Control. 58, 6, p. 1457-1469 13 p., 6389713.

  Research output: Contribution to journal › Article › peer-review

  • Continuous time systems
  • Random processes
  • Closed loop systems
  • Communication

• Bode-like integral for stochastic switched systems in the presence of limited information

  Li, D. & Hovakimyan, N., Jan 2013, In: Automatica. 49, 1, p. 1-8 8 p.

  Research output: Contribution to journal › Article › peer-review

  • Networked control systems
  • Information theory
  • Conservation
  • Closed loop systems
  • Feedback

• Bottomhole pressure estimation and ℒ ₁ adaptive control in Managed Pressure Drilling system

  Li, Z., Hovakimyan, N. & Kaasa, G. O., Sep 17 2012, 1st IFAC Workshop on Automatic Control of Offshore Oil and Gas Production, ACOOG 2012. PART 1 ed. p. 128-133 6 p. (IFAC Proceedings Volumes (IFAC-PapersOnline); vol. 1, no. PART 1).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Drilling
  • Controllers
  • Actuators
  • Flow rate
  • Friction

• Collision avoidance: A game theoretic approach

  Snyder, S. & Hovakimyan, N., Jan 1 2015, AIAA Guidance, Navigation, and Control Conference. American Institute of Aeronautics and Astronautics Inc, AIAA, (AIAA Guidance, Navigation, and Control Conference, 2013).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Collision avoidance
  • Trajectories
  • Antennas

• Collision avoidance: A game theoretic approach

  Snyder, S. & Hovakimyan, N., Jan 1 2015, AIAA Guidance, Navigation, and Control Conference 2015, MGNC 2015 - Held at the AIAA SciTech Forum 2015. American Institute of Aeronautics and Astronautics Inc., (AIAA Guidance, Navigation, and Control Conference 2015, MGNC 2015 - Held at the AIAA SciTech Forum 2015).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Collision avoidance
  • Trajectories
  • Antennas

• Collision avoidance based on line-of-sight angle

  Cichella, V., Marinho, T., Stipanović, D., Hovakimyan, N., Kaminer, I. & Trujillo, A., Feb 8 2015, 54rd IEEE Conference on Decision and Control,CDC 2015. Institute of Electrical and Electronics Engineers Inc., p. 6779-6784 6 p. 7403287. (Proceedings of the IEEE Conference on Decision and Control; vol. 54rd IEEE Conference on Decision and Control,CDC 2015).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Collision Avoidance
  • Collision avoidance
  • Angle
  • Line
  • Fixed wings

• Collision avoidance in cooperative missions: Bézier surfaces for circumnavigating uncertain speed profiles

  Mehdi, S. B., Choe, R. & Hovakimyan, N., 2019, In: Journal of Guidance, Control, and Dynamics. 42, 8, p. 1779-1796 18 p.

  Research output: Contribution to journal › Article › peer-review

  • Collision Avoidance
  • collision avoidance
  • Collision avoidance
  • Collision
  • maneuvers

• Collision avoidance through path replanning using bézier curves

  Mehdi, S. B., Choe, R., Cichella, V. & Hovakimyan, N., Jan 1 2015, AIAA Guidance, Navigation, and Control Conference. American Institute of Aeronautics and Astronautics Inc, AIAA, (AIAA Guidance, Navigation, and Control Conference, 2013).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Collision avoidance
  • Trajectories
  • Planning

• Collision avoidance through path replanning using Bézier curves

  Mehdi, S. B., Choe, R., Cichella, V. & Hovakimyan, N., Jan 1 2015, AIAA Guidance, Navigation, and Control Conference 2015, MGNC 2015 - Held at the AIAA SciTech Forum 2015. American Institute of Aeronautics and Astronautics Inc., (AIAA Guidance, Navigation, and Control Conference 2015, MGNC 2015 - Held at the AIAA SciTech Forum 2015).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Collision avoidance
  • Trajectories
  • Planning

• Comparison of architectures and robustness of model reference adaptive controllers and L 1 adaptive controllers

  Kharisov, E., Hovakimyan, N. & Åström, K. J., Jan 1 2014, In: International Journal of Adaptive Control and Signal Processing. 28, 7-8, p. 633-663 31 p.

  Research output: Contribution to journal › Article › peer-review

  • Controllers
  • Closed loop systems
  • Feedback

• Comparison of several adaptive controllers according to their robustness metrics

  Kharisov, E., Hovakimyan, N. & Åström, K. J., Dec 1 2010, AIAA Guidance, Navigation, and Control Conference. AIAA 2010-8047. (AIAA Guidance, Navigation, and Control Conference).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Controllers
  • Linear systems
  • System theory
  • Closed loop systems
  • Transfer functions

• Consistent approximation of optimal control problems using Bernstein polynomials

  Cichella, V., Kaminer, I., Walton, C., Hovakimyan, N. & Pascoal, A. M., Dec 2019, 2019 IEEE 58th Conference on Decision and Control, CDC 2019. Institute of Electrical and Electronics Engineers Inc., p. 4292-4297 6 p. 9029677. (Proceedings of the IEEE Conference on Decision and Control; vol. 2019-December).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Bernstein Polynomials
  • Polynomial approximation
  • Optimal Control Problem
  • Polynomials
  • Polynomial Approximation

• Control design for an aerial manipulator for pick-and-place tasks

  Sun, D., Wan, N., Hovakimyan, N., Dai, W. & Zhang, Y., 2019, AIAA Scitech 2019 Forum. American Institute of Aeronautics and Astronautics Inc, AIAA, (AIAA Scitech 2019 Forum).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Manipulators
  • Antennas
  • Controllers
  • Robotics

• Control of continuous-time systems with communication constraints: Linear quadratic stabilization and fundamental limitations

  Li, D. & Hovakimyan, N., Oct 15 2010, Proceedings of the 2010 American Control Conference, ACC 2010. p. 343-348 6 p. 5530817. (Proceedings of the 2010 American Control Conference, ACC 2010).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Continuous time systems
  • Stochastic systems
  • Information theory
  • White noise
  • Linear matrix inequalities

• Convergence of a PI coordination protocol in networks with switching topology and quantized measurements

  Xargay, E., Choe, R., Hovakimyan, N. & Kaminer, I., Dec 1 2012, In: Proceedings of the IEEE Conference on Decision and Control. p. 6107-6112 6 p., 6426392.

  Research output: Contribution to journal › Conference article › peer-review

  • Switching networks
  • Disturbance rejection
  • Disturbance Rejection
  • Topology
  • Information Flow

• Convex multi-objective filter optimization for output feedback L₁ adaptive controller

  Jafarnejadsani, H., Lee, H. & Hovakimyan, N., Jan 1 2016, AIAA Guidance, Navigation, and Control Conference. American Institute of Aeronautics and Astronautics Inc, AIAA, (2016 AIAA Guidance, Navigation, and Control Conference).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Feedback
  • Controllers
  • Closed loop systems
  • Adaptive systems
  • Low pass filters

• Cooperative Path Following of Multiple Multirotors over Time-Varying Networks

  Cichella, V., Kaminer, I., Dobrokhodov, V., Xargay, E., Choe, R., Hovakimyan, N., Aguiar, A. P. & Pascoal, A. M., Jul 1 2015, In: IEEE Transactions on Automation Science and Engineering. 12, 3, p. 945-957 13 p., 7065327.

  Research output: Contribution to journal › Article › peer-review

  • Time varying networks
  • Unmanned aerial vehicles (UAV)
  • Telecommunication networks
  • Topology

• Cooperative target tracking in balanced circular formation: Multiple UAVs tracking a ground vehicle

  Ma, L. & Hovakimyan, N., Sep 11 2013, 2013 American Control Conference, ACC 2013. p. 5386-5391 6 p. 6580679. (Proceedings of the American Control Conference).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Ground vehicles
  • Target tracking
  • Unmanned aerial vehicles (UAV)
  • Topology
  • Communication

• Cooperative Target Tracking with Time-Varying Formation Radius

  Ma, L. & Hovakimyan, N., Nov 16 2015, 2015 European Control Conference, ECC 2015. Institute of Electrical and Electronics Engineers Inc., p. 1699-1704 6 p. 7330782. (2015 European Control Conference, ECC 2015).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Target tracking
  • Unmanned aerial vehicles (UAV)
  • Topology
  • Orbits
  • Communication

• Cooperative trajectory generation using Pythagorean Hodograph Bézier curves

  Choe, R., Puig-Navarro, J., Cichella, V., Xargay, E. & Hovakimyan, N., 2016, In: Journal of Guidance, Control, and Dynamics. 39, 8, p. 1744-1763 20 p.

  Research output: Contribution to journal › Article › peer-review

  • Trajectory Generation
  • hodographs
  • Pythagorean-hodograph Curves
  • trajectories
  • trajectory

• Cooperative Vision Based Tracking of multiple UAVs

  Cichella, V., Kaminer, I., Dobrokhodov, V. & Hovakimyan, N., 2013, AIAA Guidance, Navigation, and Control (GNC) Conference. American Institute of Aeronautics and Astronautics Inc., (AIAA Guidance, Navigation, and Control (GNC) Conference).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Unmanned aerial vehicles (UAV)
  • Decentralized control
  • Angular velocity
  • Phase shift
  • Target tracking

• Coordinated vision-based tracking for multiple UAVs

  Cichella, V., Kaminer, I., Dobrokhodov, V. & Hovakimyan, N., Dec 11 2015, IROS Hamburg 2015 - Conference Digest: IEEE/RSJ International Conference on Intelligent Robots and Systems. Institute of Electrical and Electronics Engineers Inc., p. 656-661 6 p. 7353442. (IEEE International Conference on Intelligent Robots and Systems; vol. 2015-December).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Unmanned aerial vehicles (UAV)
  • Time varying networks
  • Phase separation
  • Decentralized control
  • Target tracking

• Cyclic pursuit with vision-assisted estimation

  Ma, L. & Hovakimyan, N., Oct 15 2010, Proceedings of the 2010 American Control Conference, ACC 2010. p. 5532-5537 6 p. 5531000. (Proceedings of the 2010 American Control Conference, ACC 2010).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Communication
  • Cameras
  • Computer simulation

• Decentralised L₁ adaptive control for large-scale non-linear systems with interconnected unmodelled dynamics

  Yoo, S. J., Hovakimyan, N. & Cao, C., Oct 1 2010, In: IET Control Theory and Applications. 4, 10, p. 1972-1988 17 p.

  Research output: Contribution to journal › Article › peer-review

  • Unmodeled Dynamics
  • Decentralized
  • Large-scale Systems
  • Adaptive Control
  • Nonlinear systems

• Decentralized L₁ adaptive control for large-scale systems with unknown time-varying interaction parameters

  Yoo, S. J., Hovakimyan, N. & Cao, C., Oct 15 2010, Proceedings of the 2010 American Control Conference, ACC 2010. p. 5590-5595 6 p. 5531027. (Proceedings of the 2010 American Control Conference, ACC 2010).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Large scale systems
  • Controllers
  • Adaptive systems

• Detectability of Intermittent Zero-Dynamics Attack in Networked Control Systems

  Mao, Y., Jafarnejadsani, H., Zhao, P., Akyol, E. & Hovakimyan, N., Dec 2019, 2019 IEEE 58th Conference on Decision and Control, CDC 2019. Institute of Electrical and Electronics Engineers Inc., p. 5605-5610 6 p. 9029997. (Proceedings of the IEEE Conference on Decision and Control; vol. 2019-December).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Networked Control Systems
  • Detectability
  • Networked control systems
  • Attack
  • Topology

• Development of verification and validation approaches for ℒ ₁ adaptive control: Multi-criteria optimization for filter design

  Kim, K. K. K. & Hovakimyan, N., 2010, AIAA Guidance, Navigation, and Control Conference. AIAA 2010-7691. (AIAA Guidance, Navigation, and Control Conference).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Specifications
  • Control theory
  • Time delay
  • Uncertainty
  • Controllers

• Distributed control of uncertain networked systems: A Decoupled design

  Wang, X. & Hovakimyan, N., Oct 4 2013, In: IEEE Transactions on Automatic Control. 58, 10, p. 2536-2549 14 p., 6520880.

  Research output: Contribution to journal › Article › peer-review

  • Network protocols
  • Uncertainty
  • Feedback control
  • Communication
  • Networked control systems

• Distributed event-triggered consensus algorithm for uncertain multi-agent systems

  Kharisov, E., Wang, X. & Hovakimyan, N., 2010, AIAA Guidance, Navigation, and Control Conference. AIAA 2010-8325. (AIAA Guidance, Navigation, and Control Conference).

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Multi agent systems
  • Uncertainty
  • Communication
  • Closed loop systems
  • Controllers