信号数字处理中抗混滤波器的技术指标分析及其设计

本文从信号处理设备对输入信号进行时域和频域数字信号处理的角度,论述了采用抗混滤波器进行抗混滤波的必要性.经论证提出了抗混滤波器的设计指标,进行了切比雪夫抗混滤波器的设计计算.最后对实现的抗混滤波器进行了性能测试,取得了满意结果.     

雷达组网系统仿真试验信息源软件研制

针对目前雷达模拟器不能满足雷达组网系统调试与模拟测试需求的问题,在分析雷达组网系统测试信息源功能需求的基础上,采用纯软件的实现方法,从体系结构、功能模块和信息流3个方面对系统进行了详细的设计,讨论分析了具体技术实现中的几个关键问题,给出了具体的仿真实例。系统测试结果验证了设计的合理性,该设计满足了雷达组网系统测试对目标和雷达控制灵活性等多方面的需求。     

鱼雷加速可靠性试验体系

随着鱼雷技术的发展,传统模拟试验越来越难以发现其潜在缺陷,从而难以提高鱼雷武器可靠性和质量水平。加速可靠性试验体系一改传统试验做法,可使鱼雷产品可靠性得到进一步提高。主要对加速试验体系中ALT、HALT、HASS试验的国内外发展现状、理论及其在鱼雷上的应用进行了概述。     

Development programs for one‐shot systems using multiple‐state design reliability models

Design reliability at the beginning of a product development program is typically low, and development costs can account for a large proportion of total product cost. We consider how to conduct development programs (series of tests and redesigns) for one‐shot systems (which are destroyed at first use or during testing). In rough terms, our aim is to both achieve high final design reliability and spend as little of a fixed budget as possible on development. We employ multiple‐state reliability models. Dynamic programming is used to identify a best test‐and‐redesign strategy and is shown to be presently computationally feasible for at least 5‐state models. Our analysis is flexible enough to allow for the accelerated stress testing needed in the case of ultra‐high reliability requirements, where testing otherwise provides little information on design reliability change. © 2004 Wiley Periodicals, Inc. Naval Research Logistics, 2004     

一个实用的高速串行数据传输系统

本文根据雷达性能综合自动检测系统的要求,设计了一套实用的串行数据传输系统,其最大传输速率为1.5×10~5bit/s ,此系统可作为一个通用的串行数据传输系统,应用于传输速率≤1.5×10~5bit/s范围内的其它系统。     

单片机控制的指挥仪航路产生系统

本文首先介绍单片机控制的指挥仪航路产生系统的原理及组成,重点讨论了目标现在点坐标由数字量到指挥仪所需要的模拟信号的转换方法,最后对该系统的误差结果进行了分析。     

金属磁记忆管道检测机器人的应用研究

阐述了金属磁记忆检测技术的基本原理及磁记忆检测机器人的研究现状,针对存在的问题,基于形态分析法对不同驱动形式的机器人进行优选。提出了一种适用于150mm管径的螺旋轮式机器人驱动系统,对机器人的动力系统和检测单元进行设计,为长输管道磁记忆检测机器人的结构设计和优化提供了有益参考。     

Optimal design of accelerated life testing plans for periodical replacement with penalty

Accelerated life testing (ALT), enhanced by optimal test plans, has been widely accepted in practice as a quick approach for estimating the reliability of a product. From the estimation result, preventive maintenance schedules can be determined to ensure the performance of the product under its normal operating conditions. By default, maintenance decision‐making is regarded as the last and least rewarding step. However, sometimes the maintenance schedules, such as preventive maintenance intervals, are predetermined due to customer concerns and/or by various mandatory regulations and rules. Under such circumstances, how to accurately estimate the expenditure (e.g., on maintenance or spare parts management) associated with these maintenance requirements becomes an important issue. A viable solution is to incorporate the maintenance requirements into ALT plans. This paper provides an approach for the optimal design of ALT plans oriented by a mandatory periodical replacement schedule subject to a discounted penalty. The objective is to improve the estimation accuracy of the economic impact of this maintenance requirement. A numerical experiment is provided to demonstrate the approach in practical use. © 2008 Wiley Periodicals, Inc. Naval Research Logistics 2009     

软件的测试性分析与设计

软件测试是提高软件可靠性的重要手段,但软件测试的代价是巨大的。软件的测试性分析与设计是分析软件测试的复杂性,提高软件测试性的基本方法。本文提出了软件测试性的基本概念、分析与计算方法、以及软件测试性设计的基本思路。这对于高可靠性软件,特别是武器装备软件的设计是有指导意义的。     

Testing of software with an operational profile

One of the important features of any software system is its operational profile. This is simply the set of all operations that a software is designed to perform and the occurence probabilities of these operations. We present a new model on optimal software testing such that testing is done sequentially using a set of test cases. There may be failures due to the operations in each of these cases. The model parameters, consisting of testing costs and failure rates, all depend on the cases used and the operations performed. Our aim is to find the optimal testing durations in all of the cases in order to minimize the total expected cost. This problem leads to interesting decision models involving nonlinear programming formulations that possess explicit analytical solutions under reasonable assumptions. © 2000 John Wiley & Sons, Inc., Naval Research Logistics 47: 620–634, 2000