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This paper proposes the improvement method of operability in a bilateral control by using visual information. The bilateral control system consists of a master system which is manipulated by the operator and a slave system which contacts remove environment. Considering the actual use of the bilateral control, the operator manipulates the master system while watching the visual information from the...
In order to realize the differential function of electric vehicle driven by two rear wheel-hub motors, by following the optimal slip ratio of each wheel and equalizing the slip ratio of both drive wheels as target, a electronic differential control strategy based on terminal sliding mode is proposed. First of all, according to the standard μ-λ curve, the optimal slip ratio of the pavement is determined...
Automation systems, as well as process control, has played a key role in the industry nowadays. For good system performance, it is necessary that mathematical model is closest to the real model, which is detailed in this work. The objective of this study is to present a modeling (considering the viscous friction), stability analysis and simple PID controller tuning using as an example, an arm with...
In this paper a novel formation control frame-work is presented for unmanned autonomous ground vehicles based on analytical mechanics and multibody interpretation. The coordinated motion is achieved by introducing holonomic constraint functions that describe the interaction between the vehicles. These functions are interpreted as constraint forces and the decentralized control law is determined for...
Heavy lift crane vessels play an important role in offshore installations. Previous studies have shown that position control systems for these vessels can cause unstable positioning behavior during offshore construction assignments under specific conditions, e.g., change of environmental loads. Some control methods, such as crane force feedforward to the controller or the estimator, have been developed...
This paper aims to develop the method for identifying human and environmental impedances with information in the frequency domain by using bilateral control system. In the conventional method, a sinusoidal wave is added to the common mode of bilateral control system, however, this method cannot extract haptic information in frequency domain. Human impedances are assumed to change every moment, and...
In this paper, system design and motion control of a nursing lift robot which runs on the ground is presented. This supporting lift robot provides a power assist function for transfer aid system with hoisting and lowering, and also an omnidirectional motion function, using DDSS (Differential Drive Steering System). Further, logic control to suppress limit cycle of lift at grounding is proposed. The...
This paper combines coverage control, random-walk and artificial potential method to deploy multi-copter type Unmanned Aerial Vehicles (UAVs). With the coverage control, it is able to deploy agents in the coverage area with arbitrary distribution based on the purpose of control. However, when initial position of agents concentrates on one location, it could be fallen into the local optimal solution...
The main factors affecting the electrical life of contactor are the arc and two bounces produced by the opening and closing of contact. Through the research of double coils AC contactor, this paper proposes a closed loop control method based on velocity. Through the velocity feedback, the excitation coil current is adjusted in real time so that the contactor can work at a predetermined velocity, reducing...
Cornea transplantation surgery needs a highly skilled ophthalmologist due to the requirement of precise positioning and the plasticity of a cornea. In this paper, we propose a cornea holding device, which fixes the relative position between a donor cornea and a patient cornea. The proposed device prevents the slipping or deformation of the corneas during transplantation surgery. The cornea holder...
A reconfiguration method using model-based control allocation scheme is proposed in this paper. A reconfigurable closed-loop control system is established for control of a UAV (unmanned aerial vehicle) fixed wing aircraft in autonomous flight in case of single and multiple control surfaces failures. The control allocation is determined by using of a nonlinear dynamic model of a UAV aircraft. The model...
The control load system is a force simulation system, which simulates the operating force of the pilot when piloting an aircraft. According to the analysis of a certain type of aircraft control load system, designs an electric load control system by using DC torque motor as actuator. The system takes DSP TMS320F28335 as the controller, with the signal conditioning circuit, A/D conversion circuit,...
A tail-controlled BTT missile with flaps control is presented. First, we derive the nonlinear system model of the six-degree-of-freedom with two inputs. Based on choosing the angle-of-attack and roll angle as output variables, the internal dynamics of the system are analyzed by using differential geometry method, and are proved to be stabilized. An autopilot is designed by using the feedback linearization...
Based on the working principle of the electrohydraulic proportional control system of the working device of the demolition robot, the co-simulation model of the system is established by means of ADAMS and MATLAB. The study of the dynamic characteristics of the system was done, with applying traditional PID control strategy and sliding mode variable structure control respectively, considering the change...
In this work, a surface skin electromyography(sEMG)-based control solution for elbow wearable assistive devices during load lifting tasks is presented. The goal of the controller consists in limiting the user's muscle activity during the task execution, in such a way that the assistive device can partially compensate the load-related biceps muscle effort. Since sEMG-driven control strategies based...
An optimum resource partition decision model for a class of warfare command systems in conflicts of two opponents, where the total forces of operational side is not superior to the forces of enemy side, on the grounds of Lanchester square law equations has been developed. The issue on how to solve the maximum residual strength of the operational side against the enemy is thoroughly addressed. The...
This study presents a scaled-bilateral telemanipulation system for magnetic-based control of paramagnetic microparticles. This bilateral control system consists of a haptic device (master-robot) and an electromagnetic system with four orthogonal electromagnetic coils. The electromagnetic system generates magnetic field gradients to control the motion of the microparticle (slave-microrobot). A systematic...
The high and low frequency composite vibration is the most basic composite vibration in the multi-frequency vibration, which is the basis for studying the multi-frequency vibration. In this paper, the high and low frequency composite vibration device is designed by using the double eccentric block mechanism, and the optimized design and analysis are carried out. The vibration device can produce controllable...
In this paper, we propose a nonlinear acceleration controller that can be used for both the endo- and exo-atmospheric interceptors with thrust vector control (TVC) without changing the control configuration. The acceleration perpendicular to the velocity vector is selected as the output to be controlled. Then apply the feedback linearization and the specific form of the desired error dynamics to create...
This research proposes a Kalman filter-based equivalent elastic force feedback approach for time-delay compensation. This research shows that the time-varying delay can be regarded as noise in the input and output signals. In order to achieve robustness, this research proposes a Kalman filter-based state observer (KFSO) in the time-delay system for the estimation and the compensation of the disturbance...
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