高真空下大功率直线超声电机电-振-热双向耦合温升预测及抑制策略研究

高真空环境中的剧烈温升问题，是大功率直线超声电机应用在空间探测器等尖端领域亟待突破的技术瓶颈之一。然而，超声电机系统中固有的电-振-热双向耦合效应对高真空下电机温升的精准预测及有效抑制构成挑战。本项目拟采用“场路”结合方法与多学科协同优化思想，以电-振-热双向耦合效应为突破口，开展高真空下大功率直线超声电机的温升预测及抑制策略研究。首先，建立超声电机损耗的“场路”结合分析方法与精确计算模型，阐明其电-振-热双向耦合温升机制，进而构建基于场-路-运动耦合的高真空下电机多工况温升精准预测模型，研究其关键部件温升的时空分布规律，并探明几何-机-电多域参数对电机温升的影响规律，提出基于几何-机-电-控多域协同优化的高真空下电机温升抑制策略。本研究提出的高真空下电机损耗精确建模、关键部件温升快速精准预测及有效抑制的系统理论与方法，将为空间环境下大功率直线超声电机的推广应用提供理论和技术支撑。

The drastic temperature rise issue under high vacuum has become one of the technical bottlenecks which needs to be urgently broken for the high-power linear ultrasonic motors (HPLUMs) applied in space probe and other cutting-edge fields. However, the electrical-vibration-thermal two-way coupled effect in ultrasonic motor system poses challenges to accurately predicting and effectively suppressing for its temperature rise under high vacuum. By adopting the “field-circuit” combination method as well as the multi-disciplinary collaborative optimization idea and taking the electrical-vibration-thermal two-way coupled effect as the breakthrough point, the research on the temperature rise prediction and suppression strategy for the HPLUMs under high vacuum will be carried out in this project. Firstly, the “field-circuit” combination analysis method and the accurate calculation model of the motor loss are established to clarify the electrical-vibration-thermal two-way coupled temperature rise mechanism of the motor under high vacuum. Secondly, an accurate multi-operating condition temperature rise predicting model of the motor is constructed based on the field-circuit-movement coupled modeling, which is used to investigate the space-time distribution law of the temperature rise of its critical components and ascertain the influence laws of the geometry-mechanical-electrical multi-domain parameters on temperature rise of the motor. Finally, a novel geometry-mechanical-electrical-control multi-domain collaborative optimization strategy is developed to effectively suppress the temperature rise of the motor under high vacuum. The systematic theories and methods on the accurate modeling for the motor loss, the accurate predicting for critical components of the motor as well as the effectively suppressing for the motor temperature rise under high vacuum proposed in this project will provide theoretical and technical support for their promotion and application in space environment of the HPLUMs.