Force reflection methods are widely used in teleoperation with force sensors on slave manipulator. However, force sensors would impair manipulator structure and may be installed or maintained difficultly on slave site...
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ISBN:
(纸本)9781467374439
Force reflection methods are widely used in teleoperation with force sensors on slave manipulator. However, force sensors would impair manipulator structure and may be installed or maintained difficultly on slave site. Additionally, in some tasks operator pays more attention to control the exerted force on environment than to fell the reflection force. Considering these factors, a force sending method is proposed in this paper with force sensors installed only on master manipulator. Adjusted virtual force is provided to operator on master site. Operator force sending and slave manipulator position tracking are achieved without conflict on slave site. Stability analysis is presented based on ISS(input-to-state stability) method and numerical simulations are given to show the effectiveness.
This paper presents the problem of optimal distributed weighted Kalman filter fusion for a class of multi-sensor unreliable networked systems with uncorrelated *** distributed multi-sensor data fusion system suffers m...
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ISBN:
(纸本)9781509009107
This paper presents the problem of optimal distributed weighted Kalman filter fusion for a class of multi-sensor unreliable networked systems with uncorrelated *** distributed multi-sensor data fusion system suffers measurements delay or loss due to unreliability of networked systems with uncorrelated *** the addressed model,an optimal local Kalman filter with a finite buffer is derived for each subsystem,which can also be used as a centralized optimal Kalman filter fusion *** on the new optimal local Kalman filter,multi-sensor optimal distributed weighted Kalman filter fusion with finite buffers has been ***,compared with the centralized optimal Kalman filter fusion algorithm,the proposed distributed weighted Kalman filter fusion algorithm developed in this paper has stronger fault-tolerance *** results are provided to illustrate the effectiveness of the proposed approaches.
This paper presents a new method for optimal design of controllers based on a "library" thought and differential *** first an extensible component library and a performance criteria library are established i...
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ISBN:
(纸本)9781467374439
This paper presents a new method for optimal design of controllers based on a "library" thought and differential *** first an extensible component library and a performance criteria library are established in the *** component library contains different types of system components which may be essential for controller *** components can be selected from the library and then combined to form a controller with richer *** performance criteria library includes some common control performance *** can choose one from it according to performance ***,the differential evolution algorithm is utilized to optimize the parameters of each component in order to find the optimal solution and ultimately obtain the controller structure and parameters which meet *** were done on different types of control *** results show that the controllers designed by the proposed method for different types of control objects generally have better comprehensive performance than the PID controllers designed by conventional methods,differential evolution and genetic ***,stability and generalizability of the proposed method were also tested and verified.
Hysteresis brake,which provides for step-less torque and high speed,is a stable and reliable device used for loading,but with some problems,such as the large time-lag,strong nonlinearity,and difficulty in modeling et ...
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ISBN:
(纸本)9781509009107
Hysteresis brake,which provides for step-less torque and high speed,is a stable and reliable device used for loading,but with some problems,such as the large time-lag,strong nonlinearity,and difficulty in modeling et *** to the above-mentioned issues,the special working conditions of hysteresis brake developed by our project team and the advantage of the dynamical performance of the Elman Multi-Hidden Layers Neural Network,this paper employs modified neural network algorithm with Elman dynamic recursive structure to accomplish the model of hysteresis brake,and guarantees the accuracy of output loaded *** this algorithm,we introduce the speed,the given and desired torque,and a directivity factor respectively as a disturbance variable and two input vectors of the system,and then train the model and *** numerical results validate the effectiveness of the algorithm proposed.
In this paper,a sliding mode control using LESO coupled with an inverse hysteresis compensator is proposed for the motion tracking control of a microposition system with piezoelectric actuator(PEA).The inverse hystere...
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ISBN:
(纸本)9781479947249
In this paper,a sliding mode control using LESO coupled with an inverse hysteresis compensator is proposed for the motion tracking control of a microposition system with piezoelectric actuator(PEA).The inverse hysteresis compensator is involved in eliminating the hysteresis nonlinearity reducing the nonlinear system to a linear ***,a sliding mode controller combining with LESO is adopted to handle all the unmodeled dynamics and disturbances,with an intention of improving and enhancing the dynamic performance and the robustness of *** feasibility of the proposed control scheme is verified by experiment of a *** result shows that when faced with a fast-rate control input,the proposed method can also ensure the system a good performance.
Considering the uncertainties parameters and unknown dynamics of permanent-magnet synchronous motors in real applications,a composite controller strategy for electromechanical actuator is proposed in this *** composit...
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ISBN:
(纸本)9781479947249
Considering the uncertainties parameters and unknown dynamics of permanent-magnet synchronous motors in real applications,a composite controller strategy for electromechanical actuator is proposed in this *** composite strategy consists of a disturbances observer based on linear extended state observer that suppresses disturbances by feedforward compensation and a Lyapunov stability-based position controller.A non-singular terminal sliding mode position controller is used here due to its good performance,under which state errors would converge to zero in finite ***,special forms of load torque,hinge moment,and sinusoidal torque disturbances have been taken into consideration in this *** proposed control strategy is verified via *** performance with respect to position tracking and robustness to load disturbances and parametric uncertainties of the motor have been demonstrated.
To make robots walk smoothly and stably,it is necessary to solve ground impacts during dynamic *** motion control can help to reduce the impacts and improve the robot's adaptability to complex *** control is a use...
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ISBN:
(纸本)9781509046584
To make robots walk smoothly and stably,it is necessary to solve ground impacts during dynamic *** motion control can help to reduce the impacts and improve the robot's adaptability to complex *** control is a useful framework to provide robot's leg *** conventional impedance control employs second-order mass-damping-spring system as a force disturbance *** this paper,position-based impedance control is applied to legged locomotion of the wheel-legged robot and a novel impedance controller with fractional order form is put forward to increase the system degrees of freedom for *** simulation tests of electric cylinder actuator and leg systems are carried out to demonstrate the effectiveness of the proposed algorithm.
Special Re-use TDMA(STDMA) emerges as a promising channel access technique for providing Quality of Service(QoS) guarantees in multi-hop ad Hoc networks such as community mesh and sensor networks. The contention-free ...
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ISBN:
(纸本)9781479947249
Special Re-use TDMA(STDMA) emerges as a promising channel access technique for providing Quality of Service(QoS) guarantees in multi-hop ad Hoc networks such as community mesh and sensor networks. The contention-free channel access combined with special reuse of the channel provides significant benefits in the energy/throughput trade-off. However, the protocol may introduce scheduling delay if, on the same path, an outbound link on a router is scheduled to transmit before an inbound link on that router. The total scheduling delay can be quite large since it accumulates at every hop on a path. This paper presents a method to solve this problem to improve the performance of the network system. Compared to the origin STDMA protocol, simulation results present us the superior performance of the proposed algorithm.
There are usually large uncertainties in the aerodynamic parameters of Mars entry vehicles,which inevitably degrades the performance of entry guidance *** paper presents a backstepping sliding mode controller for drag...
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ISBN:
(纸本)9781538629185
There are usually large uncertainties in the aerodynamic parameters of Mars entry vehicles,which inevitably degrades the performance of entry guidance *** paper presents a backstepping sliding mode controller for drag tracking in Mars entry guidance,which can guarantee the tracking error with finite-time ***,the drag can track the reference trajectory under the virtual control law by introducing a sliding manifold,and the extended state observer(ESO) is used to estimate and counteract the ***,the finite-time convergence of drag tracking error can be achieved under the proposed backstepping sliding mode guidance *** addition,the rigorous proof of tracking error convergence is ***,numerical simulation results are presented to demonstrate the effectiveness of the proposed guidance law.
Wireless networked controlsystems have gained significant popularity due to commissioning and maintenance *** 802.15.4 standard is one of wireless communication protocol for low delay deterministic *** automation,not...
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ISBN:
(纸本)9781538629185
Wireless networked controlsystems have gained significant popularity due to commissioning and maintenance *** 802.15.4 standard is one of wireless communication protocol for low delay deterministic *** automation,not only needs low delay but also requires the network that should has the capacity of various delay *** this paper,we propose a scheme,satisfying the muli-delay network in the networked control *** are using TI SmartRF04 EB evaluation boards with CC2530 SoC and TIMAC software stack CC2530 boards,as well as dc servo motors for a speed tracking control problem.
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