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This paper presents the decoupling control of a nonlinear pitch-bank road 4WS vehicle model. Decoupling conditions of the vehicle model are obtained, which are neither braking too hard that rear wheels leave the ground nor accelerating too fast that front wheels leave the ground. Under these decoupling conditions, the output-feedback control dynamic law and the decoupling result are gained. In the...
Before shifting into tracking phase, terminal guidance radar usually scans a region which includes targets. The scanning lines, commonly designed to be straight scanning lines, are a set of traces radar main beam moving to cover the field. This paper begins with giving a compensation method of range cell migration leading in by high-speed platform along the straight scanning, and then analyzes the...
Particle swarm optimization (PSO) is a novel evolutionary algorithm which has a better convergence rate and computation precision compared with other evolutionary algorithms. From the perspective of optimization, the self-tuning of PID controller parameters is to find the best global optimum value in the solution space of Kp, Ki, Kd. In this paper an optimal design of PID controller based on particle...
Sea surface drag coefficient CD is fitted by four wind-wave parameters that are wave age, wave steepness, windsea Reynolds number RB and RH directly, with laboratory, field and combined data set. Comparison and analysis of dependence of CD on wind-wave parameters show that, among the four wind-wave parameters, windsea Reynolds number RB can fit the CD most appropriately.
The approach combines both Chan's algorithm and another close-form algorithm to solve the aircraft multilateration surveillance equations. Results developed are applicable for the surveillance system as a final location solution or as an initial one for the iteration algorithm. However, the ambiguous problem occurs if there are only three TOA measurements. So, the approach will also focus on it and...
The imaging of bistatic SAR with asynchronous transceiver positions is studied in this paper. First of all, the geometry of the asynchronous transceiver model is constructed, and the approximation model of the echo from the bistatic SAR is obtained based on the analysis of the instantaneous transceiver distance. Asynchronous transceiver positions will lead to non-uniform SAR data. This paper first...
The concept of the multi-signature was first proposed by Itakura and Nakamura, in which multiple signers can cooperate to sign the same message and any verifier can verify the validity of the multi-signature. After that, a lot of multi-signature schemes were proposed, but almost all of the multi-signature schemes are either sequence multi-signature or broadcasting multi-signature, but a lot of examples...
To estimate software effort according to software size, statistical analysis was held using the historical project data. The tool statistics method and the programming statistics method were adopted independently for linearity regression analysis. After the regression analysis, the linearity regression equation was obtained. The final studies showed that the outcomes obtained by these two methods...
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