基于场耦合理论的频率源减振系统机电综合优化

The vibration level of aviation platform gradually improves with the development of hypersonic weapons.Starting from the performance of the tactical requirement and system, electronic equipment of frequency source module provides more pure and smaller requirements to reference signal. However, the existing technology of frequency source noise reduction is unable to meet the high demand for electronic systems. Field coupling theory and method of vibration and noise reduction design, provide new ways to solve this kind of problems. For many years most studies are focused on the temperature and acceleration compensation in this field, although the United States has developed electrical performance compensation frequency source prototype, scientific and technical details were not disclosed. Based on the frequency source noise design technology field coupling theory of the field, no domestic research institutions has engaged the research in this technology. After the full investigation about frequency source phase noise compensation technology and the problem for the new technology applications in hypersonic aircraft electronic systems encountered, two scientific issues of general importance are as follow: Coupling problem on the displacement field and the electromagnetic field in the oscillator tuning process; The electromechanical integrated optimization problem of frequency source damping system. The project will be carried out in-depth study of these issues, the theory and methods will be proposed to provide strong theoretical support for our high-stability frequency source in next-generation airborne platform.

随着高超音速武器的发展，航空平台的振动量级逐渐提高。从战术需求和系统性能出发，电子装备对频率源模块提出了参考信号更纯和减振空间更小的要求。然而，现有的频率源降噪技术无法满足电子系统的高要求。场耦合理论方法以及减振降噪设计理念的出现，为解决这一难题提供了新的思路。多年来该领域的研究多数集中在温度偏移及加速度变化带来的电性能恶化方面，虽然美国已研制了电性能补偿的频率源原理样机，但科学技术细节并未公布。在基于场耦合理论的频率源降噪设计领域，国内尚无研究机构从事该技术的研究。经过对国内外频率源减振降噪技术的充分调研，针对该技术在高超音速航空电子系统中应用遇到的新问题，凝练出以下两个具有一般意义的科学问题: 晶振信号调谐过程中结构位移场与电磁场的场耦合问题；频率源减振系统机电综合优化问题。本项目将对这些问题进行深入系统的研究，提出相关理论和方法，为我国下一代航空平台高稳频率源的研制提供强有力的支持。

项目针对电子设备小型化、高频段的发展趋势以及平台的更高振动量级特点，对频率源模块提出了更小减振空间和更高振动控制精度的要求。本项目以此为背景，研究新的减振降噪方式，着重研究振动环境对晶振模块输出相噪的影响机理以及晶振电路补偿系统。突破晶振复杂振动环境工作机理的相关技术，主要包括晶振简谐振动工作机理推演技术、晶振稳健性数学表征技术，并在此基础上，以某晶振为对象，提出了晶振振动工作机理推演算法，为主动补偿平台提供电气及力学设计边界，支撑晶振模块减振降噪技术验证。同时，也搭建了晶振模块减振降噪设计的机理推演平台，后续研制的原理样机最终实现了频率源系统的电补偿降噪设计，并且在低频段(20-100Hz)改善了10dB的相位噪声。.在自然科学基金资助下，申请人作为第一发明人的申请国家发明专利5项（授权2项），其它成员作为第一发明人授权国家发明专利2项，本项目所突破的关键技术已经在2个军方项目中应用并起到了至关重要的作用，产生了较大的军事效益。