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在导弹结构静强度和热强度试验中,不可避免地要对结构进行多点加载和多域加热的实时控制。多点加载时通过结构弹性变形产生各加载点的载荷相互影响,多域加热时由于结构温区间的热传导产生各控温点温度的相互影响;多点加载多域加热同时作用时,产生结构上的载荷与温度问的相互影响,这些影响统称为耦合。为了保证实验正常进行,达到各加载点和控温点的控制精度,必须对载荷和温度进行多变量实时控制。本文针对部内某型号导弹强度试验设备研制中的热载多变量控制问题,作了比较详细的分析研讨,提出了载荷解耦控制、载荷广义协调解耦混合控制、载荷协调偏差控制、给定值为加载速度的载荷解耦控制及温度解耦复合控制等控制方案,对其控制原理、适用范围和设计方法作了全面论述,以期此文能对导弹强度试验的多变量控制研究有所促进。
In the test of static strength and thermal strength of missile structure, it is unavoidable to carry out multi-point loading and multi-domain heating real-time control of the structure. Multi-point load through the structure of the elastic deformation of the load point of each load interaction, multi-domain heating due to the thermal conductivity of the structure of the temperature interval between the temperature control point of mutual influence; multi-point load multi-domain heating at the same time, resulting in structural The interaction between load and temperature, these effects collectively referred to as coupling. In order to ensure the normal experiment, to achieve the control point of each loading point and temperature control accuracy, load and temperature must be multivariable real-time control. In this paper, a detailed analysis and discussion of the heat load multivariable control in the development of a certain type of missile strength test equipment in the Ministry of Industry was made, and the load decoupling control, generalized load decoupling hybrid control, load coordinated deviation control, For the load control of load decoupling control and temperature decoupling control, the control principle, scope of application and design methods are comprehensively discussed, in order to promote the study of multivariable control of missile strength test.