Error factors in the encoded sun sensor (ESS) are analyzed and simulated. Based on the analysis results, an ESS error compensation model containing structural errors and fine-code algorithm errors is established, and the corresponding calibration method for model parameters is proposed. As external parameters, installation deviation between ESS and calibration equipment are introduced to the ES...

Reactive time synchronization is becoming increasingly popular in the realm of wireless sensor networks. Unlike proactive protocols, traditionally implemented as a standalone middleware service that provides a virtual global time to the application layer, reactive techniques establish a common reference time base post facto, i.e. after an event of interest has occurred. In this paper, we presen...

Introduction: In MRI with continuously moving table (CMT-MRI) the compensation of breathing motion is a difficult problem. Existing breathing motion compensation techniques for CMT-MRI are either limited to TSE-based sequences where motion consistent snapshots are acquired with one single echo train [1,2], or they apply respiratory gating [3]. The latter approach can fail, however, if the true ...

For more accurate navigation, lever arm compensation is considered. The compensation method for GPS and an odometer is introduced and new compensation methods are proposed for an odometer to consider the effect of coordinate transformation errors and the scale factor error. The methods are applied to a GPS/INS/odometer integrated system and the simulation and experimental results show its effec...

Spoofing could pose a major threat to Global Positioning System (GPS) navigation, so the GPS users have to gain an in-depth understanding of GPS spoofing. Since spoofing attack can influence position results, spoof compensation is possible through reducing position deviations. In this paper, a novel processing technique is proposed and the wavelet transform is used to eliminate the impact of sp...

In many control system design problems a mere change in the controller (proportional) gain cannot satisfy desired specifications. As a result controller dynamics are introduced to alter (compensate) the overall (closed-loop) system dynamics. There are two widely used techniques for dynamic compensation. Lead compensation acts mainly to lower the rise time and decrease the overshoot of a feedbac...

The influence of phase noise (PN) on the performance of a multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) based communication system is analyzed. A PN power weighting function is derived which indicates the influence of the different subcarriers and the shape of the PN spectrum. For compensation of the common phase error (CPE), the maximum likelihood esti...

This paper presents a novel modeling and compensation approach for the angular transmission error in harmonic drive gearings. In the modeling, physical phenomena of the transmission error due to nonlinear elastic deformations in micro-displacement region are especially dealt with, as well as the synchronous component which has been discussed in a variety of conventional studies. Based on the an...

The ideal mathematical modle and error model of a 6-DOF portable flexible coordinate measuring machine (CMM) was established. A parameter data acquisition system for the portable flexible CMM was designed in this paper, which consisted angle sensors, temperature sensors, strain transducers and microcontroller, they were set in each joint and arm. The microcontroller was used to deal with the se...

A conventional feature compensation module for robust automatic speech recognition is usually designed separately from the training of HMM parameters of the recognizer, albeit a maximum likelihood criterion might be used in both designs. In this paper, we present an environment compensated minimum classification error training approach for the joint design of the feature compensation module and...