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An incremental ADC (lADC) using parallel counting is proposed to achieve both high accuracy and power efficiency. By operating the IADC and the counting logic alternatively within two clock phases, the proposed scheme finishes a full conversion within fewer conversion cycles. The only additional circuitry for the parallel counting is a single comparator, much less than the add-ons in other multi-step...
In this paper, a micro-power three-step Incremental ADC (IDC) is presented. The proposed IDC achieves an equivalent order of six, realized by only three integrators. Compared to traditional IDCs, the proposed topology can be more power-efficient by implemented with the very low Oversampling Ratio (OSR).
The posture of the laser head is requested strictly in the cutting along the intersecting line of laser processing robot, and the position model of intersecting line is complex. In order to meet these demands, a continuous trajectory planning method which is used to controlling the position and posture of laser head is proposed. For the normal direction of the surface keeping coaxial to the laser...
A track-and-hold amplifier (THA) for 1GSps 8bit pipelined folding and interpolation (F&I) ADC is realized in TSMC 0.18 µm 1p6m CMOS process. The THA adopts bootstrapped switch instead of simple MOS switch. Dummy transistors and duplicated source follower are also taken to improve its performance. Post simulation results prove that the THA achieves a SNDR of 51.1dB at Nyquist sampling rate. Under...
At present, different viewpoints and theories are put forward on divisions and transitions of traffic states in highway, for which decide the fundamental properties of traffic flow. Coherent-moving state, among these states, was firstly proposed in Helbing's paper [1] to discuss the hypothetical steady states in mixed traffic flow in highway traffic. Since then, possible explanations on existence,...
A 20GS/s BiCMOS latched comparator for highspeed, low-power Analog-to-Digital Converter (ADC) is proposed. The resister load of conventional current-steering comparator is replaced by an active inductor load made by a MOS transistor and a resister. This solution extends the bandwidth of the circuit without excessive power dissipation. Implemented in 0.35μm SiGe BiCMOS technology, this comparator only...
Three-dimensional model of double front axle steering system is built by UG software, which is imported to ADAMS to construct dynamics model. The whole dynamics model is set up through inputting parameters of mass and inertia as well as appending restriction and joints. Result of simulation analysis indicates that dynamics model is accurate. Model provide theoretic basis for design and optimization...
Testing and improving commercial traffic software remain as important research topics in the last three decades. Many previous approaches emphasized the driving behaviors of uninterrupted flows (e.g. car-following and lane-changing features) but paid less attentions to the driving behaviors of interrupted flows. In the paper, the distribution of reproduced departure headways at signalized intersection...
Shift schedules both for optimal dynamic performance and fuel economy are proposed in this paper for vehicles equipped with dual clutch transmissions. A range simulation model for DCT vehicles has been established to evaluate the effects on dynamic performance and fuel economy. A fuzzy logic controller for engine throttle and a PID controller for brake force are used for vehicle operation. The simulation...
An ultra-precision vibration isolation platform composes of a mechanical structure and a feedback controller. Conventionally, these two elements are designed sequentially, with the controller design subsequent to that of the mechanical structure design. The traditional design method cannot obtain the global optimum performances for the system. This paper presents an approach to integrate structural...
This paper proposes an algorithm for improving adaptation and coefficients adjustment of active queue management by particle swarm optimization PID algorithm. In this algorithm, swarm particle optimization is combined with PID algorithm, which can settle the coefficients adjustment online in PID and can adapt the variation of network traffic, so this algorithm can effectively fulfill active queue...
Bicycle traffic serves as an essential trip mode in many Asian countries, i.e. China. But along with the economic developments, the intense competition of drivers and bicyclists for right of way brings significant trouble to city traffic. This paper studies the driving and riding behaviors during intrusion conflicts in vehicles-bicycles laminar flow, which means that some bicyclists will intrude the...
The concepts and projection method of the relative width of grey common ratio and the absolute width of grey development coefficient are presented in this paper. The new method of prior check in grey modeling is also given in this paper. Some examples are also given to show that all these methods are possible and available.
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