Jingjing Jiang

Shared-control for fully actuated linear mechanical systems

This paper presents a shared-control algorithm for fully actuated, linear, mechanical systems. It is assumed that the position of the mechanical system is constrained by a set of linear inequalities. These model convex and with the addition of “logical variables” non-convex feasible sets. The shared-control action is implemented using an hysteresis-based switching strategy. Formal properties of the algorithm are established using a partial Lyapunov analysis. Simulation results on simple case studies illustrate the effectiveness of the proposed algorithm.

Shared-control for the kinematic model of a mobile robot

This paper presents a shared-control algorithm for the kinematic model of a mobile robot. The set of feasible position of the robot is defined by a group of linear inequalities. The shared-control strategy is based on a hysteresis switch and its properties are established by a Lyapunov-like analysis. Simulation results illustrate the effectiveness of the algorithm.

Shared Control for the Kinematic and Dynamic Models of a Mobile Robot

This paper presents shared-control algorithms for the kinematic and dynamic models of a mobile robot with a feasible configuration set defined by means of linear inequalities. The shared-control laws based on a hysteresis switch are designed in the case in which absolute positions are not available. Instead, we measure the distances to obstacles and angular differences. Formal properties of the closed-loop systems with the shared control are established by a Lyapunov-like analysis. Simulation results and experimental results are presented to show the effectiveness of the algorithm.

State and Output-Feedback Shared-Control for a Class of Linear Constrained Systems

This technical note presents state and output feedback shared-control algorithms for a class of linear systems in the presence of constraints on the output described by means of linear inequalities. The properties of the closed-loop shared-control systems are studied using Lyapunov arguments. Simulation results demonstrate the effectiveness of the algorithm.

Shared-control for the kinematic model of a rear-wheel drive car

This paper presents a shared-control algorithm for the kinematic model of a rear-wheel drive car, for which the set of feasible Cartesian positions is defined by a group of linear inequalities. The shared-control scheme is based on a hysteresis switch and its properties are established by a Lyapunov-like analysis. Simple numerical examples demonstrate the effectiveness of the shared-control law.

Output-feedback shared-control for fully actuated linear mechanical systems

This paper presents an output feedback shared-control algorithm for fully-actuated, linear, mechanical systems. The feasible configurations of the system are described by a group of linear inequalities which characterize a convex admissible set. The properties of the shared-control algorithm are established with a Lyapunov-like analysis. Simple numerical examples demonstrate the effectiveness of the strategy.

Shared-control for typical driving scenarios

A shared-control algorithm for the kinematic model of a rear-wheel driving car is presented. The design of the shared-controller is based on a hysteresis switch and its properties are established by a Lyapunov-like analysis. The shared-controller guarantees the safety of the car in both predefined, static environments and time-varying environments. The effectiveness of the controller is verified by two studies.

Robust Shared-Control for Rear-Wheel Drive Cars

The chapter studies the shared-control problem for the kinematic model of a group of rear-wheel drive cars in a static (i.e., time-invariant) and in a dynamic (i.e., time-varying) environment. The design of the shared controller is based on either absolute positions or “correlated positions”, such as distances to the obstacles and angle differences. The shared control is used to guarantee the safety of the car when the driver behaves dangerously. Formal properties of the closed-loop-system with shared control are established by a Lyapunov-like analysis. We also consider uncertainties in the dynamics and prove that the shared controller is able to help the driver drive the car safely in the presence of bounded disturbances. Finally, the effectiveness of the controller is verified by typical case studies, such as turning, overtaking, and emergency braking, through MATLAB simulations.

Shared-control for a UAV operating in the 3D space

This paper presents a shared-control scheme for a UAV moving in a 3D space while its feasible Cartesian position set is defined by a group of linear inequalities. A hysteresis switch is used to combine the human input and the feedback control input based on the definitions of a safe set, a hysteresis set and a “dangerous” set. Case studies given in the paper show the effectiveness of the shared-control algorithm.