The realization of voltage-mode second-order multifunction filter using current follower cascaded transconductance amplifier (CFCTA) is presented in this contribution. The proposed circuit has three voltage input node...
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ISBN:
(纸本)9781538666630
The realization of voltage-mode second-order multifunction filter using current follower cascaded transconductance amplifier (CFCTA) is presented in this contribution. The proposed circuit has three voltage input nodes and a single voltage output node. Its natural frequency and quality factor are electronically adjusted. Also, the control of the quality factor is done without affecting the natural frequency. Five filtering functions, low-pass filter (LPF), high-pass filter (HPF), band-pass filter (BPF), band-reject filter (BRF) and all-pass filter (APF), are obtained with the same circuit topology. The selection of each filter response meets the requirement of no active and passive element matching conditions. The PSpice simulation results of all five filtering functions along are included to verify the theoretical analysis.
This paper presents an efficient statistical performance analysis method of hypersonic vehicle with parametric perturbation and external uncertainties. Based on Covariance Analysis Describing Equation Technique (CADET...
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In this paper, the design of a ROS-based robotic arm is introduced from three aspects: structure, hardware and software. In order to reduce the mass of the entire robotic arm, the connecting rod of the robot arm is ma...
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In order to improve the control precision and speed, jacquardcontrol system of warp knitting machine is designed using Embedded System. Based the overall design of the jacquardcontrol system, the hardware and softwa...
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ISBN:
(纸本)9781510873377
In order to improve the control precision and speed, jacquardcontrol system of warp knitting machine is designed using Embedded System. Based the overall design of the jacquardcontrol system, the hardware and software are designed respectively. Industrial Ethernet is used to complete the data transmission in the system, aiming to improve the capacity and reliability for high speed data transmission. The synchronous control of the yarn guide pin is based on the distributed clock algorithm. The designed control system can simultaneously control multi-jacquard with faster speed and higher stability.
In this paper, an EtherCAT scanning mirror system with function of NURBS path tracking control was investigated. By using EtherCAT protocol to connect master computer with a scanning mirror system, we did a first atte...
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ISBN:
(纸本)9781538666630
In this paper, an EtherCAT scanning mirror system with function of NURBS path tracking control was investigated. By using EtherCAT protocol to connect master computer with a scanning mirror system, we did a first attempt to implement position control by the master computer, so that one can apply an advanced control algorithm to the system instead of applying a distributed control algorithm on the proprietary driver of the slave device. The technical issue of this configuration like commutation delay caused by the three-buffer-mode is addressed. A two-staged H-infinity with feed-forwardcontroller is designed for the position control loop. Moreover, considering the widely used of non-uniform rational B-spline (NURBS) in the field of CAD/CAM, we added the function of NURBS path planning in the controller so that the system can deal with complex NURBS curves. The experiment results showed that the proposed method can reduce tracking error and have better performance when comparing with traditional distributed control strategy.
In this paper, a new realization of a current-mode universal filter using the current differencing cascaded transconductance amplifiers (CDCTAs) and grounded capacitors is proposed. The tune of the natural frequency a...
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ISBN:
(纸本)9781538666630
In this paper, a new realization of a current-mode universal filter using the current differencing cascaded transconductance amplifiers (CDCTAs) and grounded capacitors is proposed. The tune of the natural frequency and the quality factor can be independently done with electronic method by adjusting the bias current. The proposed filter provides low-pass, high-pass and band-pass responses in the same circuit. The input current node has low impedance and the output current nodes have high impedance which is attractive for cascading without the use of the current buffer. The performances of the proposed filter are verified by numerous PSpice simulations using the model parameters of the NR200N and PR2000N bipolar junction transistor arrays ALA400 from AT&T with +/- 2 V supply voltages.
because of time-varying, nonlinearity and complexity of the machining process, the traditional PID control has been unable to meet the requirements, which are being high-speed and high-precision. However fuzzy control...
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ISBN:
(纸本)9781509060887
because of time-varying, nonlinearity and complexity of the machining process, the traditional PID control has been unable to meet the requirements, which are being high-speed and high-precision. However fuzzy control can be a good solution for this kind of control system. This paper aims to create a milling control process using the Simulink modeling method, which use the logic of cutting process as a mathematical terms indicates areal milling machining equations, and give it appropriate processing parameters. To ensure that the simulating results are comparable, first the process will be modelled in the MATLAB software to test the step response under various parameters. Hence, the model is correct and comparable, fuzzy controller look-up table method will added to the model to check the accuracy axial cutting depth efficiency of milling machining work -piece with three value depth of cut.
Compared with traditional robot laboratory, virtual robot laboratory integrates programming, modeling and controlling, which can assist related learning of robot courses more efficiently and directly under the conditi...
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Compared with traditional robot laboratory, virtual robot laboratory integrates programming, modeling and controlling, which can assist related learning of robot courses more efficiently and directly under the condition of saving time and equipment cost. A concept of virtual robotics laboratory based on virtual robot platform V-REP is proposed in this paper. The laboratory is divided into coordinate transformation, positive and inverse kinematics, dynamics and trajectory planning. At the same time, virtual teaching tasks of comprehensive course design for robotics is also proposed to improve students' capacity for designing virtual robots comprehensively and improve teaching quality.
A twisted string actuation module with an integrated force sensor based on optoelectronic components is presented in this paper. This solution is especially suited for very compact, light-weight and wearable robotic d...
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ISBN:
(纸本)9781509060887
A twisted string actuation module with an integrated force sensor based on optoelectronic components is presented in this paper. This solution is especially suited for very compact, light-weight and wearable robotic devices, such as exoskeletons, but is appropriate for various robotic applications. An in-depth presentation of the proposed actuation module, the description and the basic sensor working principle of the integrated force sensor are portrayed and discussed. Extensive experimental measures have been carried out to verify the actuation module compliant frame design and the related finite element analysis results. Therefore, the proposed actuation module has been used for the implementation of a simple assistive application where surface-electromyographic signals are used to detect the user's muscle activity in order to control the support action provided by the actuator, thus reducing his/her effort.
The 3D virtual scenes are widely used in different applications, such as visual simulation, augmented reality and virtual reality and so on. For reducing the time consumption with 3D modeling, we propose an improved m...
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ISBN:
(纸本)9781538695944
The 3D virtual scenes are widely used in different applications, such as visual simulation, augmented reality and virtual reality and so on. For reducing the time consumption with 3D modeling, we propose an improved method of 3D scene reconstruction based on SfM. By taking the video streaming as input, we put forward a feature similarity determination strategy to extract keyframes, and utilize a dense algorithm to improve the model accuracy. Moreover, the method appends 3D model filtering to remove the redundancy of the result models. We demonstrate our method by testing the time cost and effect of different videos and datasets. Results illustrate that our method is practical and available.
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