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Event-triggered based state estimation for autonomous operation of an aerial robotic vehicle (2019)
Journal Article
Nokhodberiz, N. S., Nemati, H., & Montazeri, A. (2019). Event-triggered based state estimation for autonomous operation of an aerial robotic vehicle. IFAC-PapersOnLine, 52(13), 2348-2353. https://doi.org/10.1016/j.ifacol.2019.11.557

In this article the problem of event-triggered (ET) state estimation for autonomous navigation of an aerial vehicle is investigated numerically. The aerial vehicle is considered as a general example of a nonlinear non-Gaussian system for state estima... Read More about Event-triggered based state estimation for autonomous operation of an aerial robotic vehicle.

Fast, vision-based, line-following schemes for Micro Aerial Vehicles in nuclear environments (2019)
Presentation / Conference
Nemati, H., Goki, S. H. M., Yazdanshenas, A., & Taylor, C. J. (2019, October). Fast, vision-based, line-following schemes for Micro Aerial Vehicles in nuclear environments. Paper presented at 2019 IEEE Nuclear Science Symposium and Medical Imaging Conference, Manchester Central Convention Centre, Manchester, United Kingdom

Many nuclear power plants are reaching the end of their economic lifetime and the decommissioning of legacy nuclear facilities is an important challenge in the next few decades. Since the radiation level in these facilities is significant, autonomous... Read More about Fast, vision-based, line-following schemes for Micro Aerial Vehicles in nuclear environments.

A fuzzy paradigmatic clustering algorithm (2019)
Journal Article
Amirjavid, F., Barak, S., & Nemati, H. (2019). A fuzzy paradigmatic clustering algorithm. IFAC-PapersOnLine, 52(13), 2360-2365. https://doi.org/10.1016/j.ifacol.2019.11.559

Clustering algorithms resume the datasets into few number of data points such as centroids or medoids, which explain the entire dataset briefly. In the domain of data-driven machine learning, the more precision with the clustering rule leads directly... Read More about A fuzzy paradigmatic clustering algorithm.

A fuzzy data-driven paradigmatic predictor (2019)
Journal Article
Amirjavid, F., Nemati, H., & Barak, S. (2019). A fuzzy data-driven paradigmatic predictor. IFAC-PapersOnLine, 52(13), 2366-2371. https://doi.org/10.1016/j.ifacol.2019.11.560

Data-driven prediction of future events is to provide decision-makers Predictive Information (PI) to decrease human-error. They usually desire possession of a predictor which works independently from the humanized configurations and works efficiently... Read More about A fuzzy data-driven paradigmatic predictor.

Robust Intelligent Control of Underactuated Ground- based and Aerial Robots with Matched/Mismatched Uncertainties and Disturbances (2019)
Presentation / Conference
Nemati, H., & Bandala Sanchez, M. (2019, July). Robust Intelligent Control of Underactuated Ground- based and Aerial Robots with Matched/Mismatched Uncertainties and Disturbances. Presented at Intelligent Fluid Power transmission And Control (IFPAC) Workshop, University of Bath, UK

Recently, inspired by nature, the evolution of novel materials and fabrication procedures for the design and control of soft-bodied robots have led to deformable actuators that are versatile, power-efficient, compliant, agile, self-healing and intell... Read More about Robust Intelligent Control of Underactuated Ground- based and Aerial Robots with Matched/Mismatched Uncertainties and Disturbances.

Assisted teleoperation for a dual-manipulator robot and coordination with aerial vehicles for nuclear decommissioning applications (2019)
Presentation / Conference
Bandala Sanchez, M., Nemati, H., Montazeri, A., & Taylor, C. J. (2019, June). Assisted teleoperation for a dual-manipulator robot and coordination with aerial vehicles for nuclear decommissioning applications. Poster presented at International Conference on Advancements in Nuclear Instrumentation Measurement Methods and their Applications (ANIMMA), Portoroz, Slovenia

This poster summarises research at Lancaster University into the modelling and control of mobile robots with application to nuclear decommissioning. The work is based on use of a mobile, hydraulically actuated robot, which is supported by information... Read More about Assisted teleoperation for a dual-manipulator robot and coordination with aerial vehicles for nuclear decommissioning applications.

Output Feedback Sliding Mode Control of Quadcopter Using IMU Navigation (2019)
Conference Proceeding
Nemati, H., & Montazeri, A. (2019). Output Feedback Sliding Mode Control of Quadcopter Using IMU Navigation. https://doi.org/10.1109/icmech.2019.8722899

The main focus of this paper is to design various nonlinear sliding mode output feedback control approaches for attitude stabilisation of a quadcopter UAV using only IMU navigation sensor. Three types of controllers are considered based on asymptotic... Read More about Output Feedback Sliding Mode Control of Quadcopter Using IMU Navigation.

Analysis and Design of a Multi-Channel Time-Varying Sliding Mode Controller and its Application in Unmanned Aerial Vehicles (2018)
Journal Article
Nemati, H., & Montazeri, A. (2018). Analysis and Design of a Multi-Channel Time-Varying Sliding Mode Controller and its Application in Unmanned Aerial Vehicles. IFAC-PapersOnLine, 51(22), 244-249. https://doi.org/10.1016/j.ifacol.2018.11.549

This study introduces a new multi-channel robust nonlinear control algorithm based on the theory of the time-varying sliding mode control (TVSMC) strategy to stabilize the attitude of an unmanned aerial vehicle (UAV) for nuclear decommissioning appli... Read More about Analysis and Design of a Multi-Channel Time-Varying Sliding Mode Controller and its Application in Unmanned Aerial Vehicles.

Design and development of a novel controller for robust attitude stabilisation of an unmanned air vehicle for nuclear environments (2018)
Conference Proceeding
Nemati, H., & Montazeri, A. (2018). Design and development of a novel controller for robust attitude stabilisation of an unmanned air vehicle for nuclear environments. In 2018 UKACC 12th International Conference on Control (CONTROL). , (373-378). https://doi.org/10.1109/control.2018.8516729

This study presents two new robust nonlinear control algorithms based on the theory of time-varying sliding mode control (TVSMC) strategy to stabilize the attitude of an unmanned aerial vehicle (UAV) for nuclear decommissioning applications. Constant... Read More about Design and development of a novel controller for robust attitude stabilisation of an unmanned air vehicle for nuclear environments.

Robust Attitude Control for Quadrotors with External Disturbances (2017)
Conference Proceeding
Nemati, H., Naghash, A., Mozafari, S., & Jamei, A. (in press). Robust Attitude Control for Quadrotors with External Disturbances

This study investigates a design procedure for a robust nonlinear control algorithm based on sliding mode control (SMC) to stabilize the attitude of a 3-DOF quadrotor UAV subject to external disturbances. Since traditional sliding mode controllers ar... Read More about Robust Attitude Control for Quadrotors with External Disturbances.

Chattering attenuation sliding mode approach for nonlinear systems (2017)
Journal Article
Nemati, H., Bando, M., & Hokamoto, S. (2017). Chattering attenuation sliding mode approach for nonlinear systems. Asian Journal of Control, 19(4), 1519-1531. https://doi.org/10.1002/asjc.1477

This study introduces a new robust nonlinear control scheme based on the theory of nonsingular terminal sliding mode control (NTSMC). Since conventional NTSMC utilizes a discontinuous switching function, a significant flaw called chattering can occur... Read More about Chattering attenuation sliding mode approach for nonlinear systems.

Satellite formation-keeping about libration points in the presence of system uncertainties (2016)
Conference Proceeding
Bando, M., Nemati, H., & Hokamoto, S. (2016). Satellite formation-keeping about libration points in the presence of system uncertainties

This paper studies a control law to stabilize the orbital motion in the vicinity of an unstable equilibrium points and periodic orbits in the circular-restricted three-body problem. Utilizing the eigenstructure of the system, the fuel efficient forma... Read More about Satellite formation-keeping about libration points in the presence of system uncertainties.

Trajectory design using the center manifold theory in the circular restricted three-body problem (2016)
Journal Article
Akiyama, Y., Bando, M., Nemati, H., & Hokamoto, S. (2016). Trajectory design using the center manifold theory in the circular restricted three-body problem. Transactions of the Japan Society for Aeronautical and Space Sciences, 14(ists30), Pd_151-Pd_158. https://doi.org/10.2322/tastj.14.pd_151

Lagrangian points are libration points in the circular restricted three-body problem. Three of them are collinear libration points, and known to have unstable periodic and quasi-periodic orbits in the vicinity of themselves. This study aims to desig... Read More about Trajectory design using the center manifold theory in the circular restricted three-body problem.

Design of sliding mode controllers for formation flying along unstable periodic orbits in CR3BP (2015)
Presentation / Conference
Nemati, H., Bando, M., & Hokamoto, S. (2015, October). Design of sliding mode controllers for formation flying along unstable periodic orbits in CR3BP. Paper presented at 66th International Astronautical Congress 2015 (IAC 2015), Jerusalem, Israel

Recently formation flying along halo orbits near a libration point or simply formation flying in the vicinity of a libration point of the circular-restricted three-body problem (CR3BP) has been studied from the point of view of future missions such a... Read More about Design of sliding mode controllers for formation flying along unstable periodic orbits in CR3BP.

Design procedure of chattering attenuation sliding mode attitude control of a satellite system (2014)
Conference Proceeding
Nemati, H., & Hokamoto, S. (2014). Design procedure of chattering attenuation sliding mode attitude control of a satellite system

This study presents a design procedure for a new robust nonlinear control algorithm based on the theory of the terminal sliding mode (TSM) to control the attitude of a satellite system. Since the traditional TSM controllers include a discontinuous fu... Read More about Design procedure of chattering attenuation sliding mode attitude control of a satellite system.

New Continuous Sliding Mode Design for Spacecraft Attitude Control (2014)
Presentation / Conference
Nemati, H., Oishi, M., Kobayashi, N., Nakata, R., & Hokamoto, S. (2014, July). New Continuous Sliding Mode Design for Spacecraft Attitude Control. Paper presented at 24th Workshop on JAXA Astrodynamics and Flight Mechanics 2014, Sagamihara, Kanagawa, Japan

New Chattering Attenuation Sliding Mode Control of a Flexible Spacecraft (2014)
Journal Article
Nemati, H., & Hokamoto, S. (2014). New Chattering Attenuation Sliding Mode Control of a Flexible Spacecraft. Transactions of the Japan Society for Aeronautical and Space Sciences, 12(ists29), Pd_71-Pd_77. https://doi.org/10.2322/tastj.12.pd_71

An improved sliding mode control (SMC) strategy for the attitude control problem of a nonlinear spacecraft with an elastic appendage is investigated. Since conventional sliding mode controllers include a discontinuous function, a significant problem... Read More about New Chattering Attenuation Sliding Mode Control of a Flexible Spacecraft.