The six-dimensional force measurement technology of aircraft model, which is closely related to design, great significance the development national aviation industry. Based on this, this paper proposes a system for rod support large aspect ratio airplane model embedded with image recognition method. mainly composed an device and device, etc. In paper, designed optimized according wind tunnel test requirements model. Then, principle in mode deduced, solution mathematical established. Two key...

Purpose The purpose of this paper is to solve the problem that analytic solution model spatial three-dimensional coordinate measuring system based on dual-position sensitive detector (PSD) complex and its precision not high. Design/methodology/approach A new measurement algorithm by optimizing back propagation (BP) neural network genetic (GA) proposed. mapping relation between coordinates space points in world light spot formed dual-PSD has been built applied prediction points. Findings...

Aimed at obtaining the minimum machined surface roughness an appropriate feed speed during wire-sawing process, theoretical mathematical model of material removal rate non-rigid cutting tool-wire saw is presented, which based on Preston equation. According to this model, diamond experiment designed study effects roughness. The experimental results indicate that can be acquired by setting process parameters as curve spindle and speed. investigation provides basis research methods for kind...

Wind tunnel balance is one of the most important measurement equipments in aerodynamic testing. In this paper, a new six-component piezoelectric developed to measure dynamic impact loading force wind tunnel. The arrangement mode triaxial load cells confirmed based on theory analysis. Furthermore, mathematical model established according calibration experimental results. Support vector machine proposed develop calibration. It an effective method predict using small samples and reduce duration...

Piezoelectric force sensors are widely used in precision measurement and machining applications. Sensitivity is one of the significant parameters determining these sensors. The influence factors, such as piezoelectric coefficient, sensor structure, temperature on sensitivity had previously been studied except roughness sheets. For design optimization, effect was investigated. A model built based electromechanical relationships systems. Fractal theory classic statistics were to define...

A piezoelectric dynamometer can produce thermal forces because of temperature fluctuations, thus affecting measurement precision. To investigate the influence force on dynamometer, this article proposes a hypothesis decreasing conduction power and establishes function over time in an ordinary based heat differential equation. novel double-sensor compensation is designed, with static calibration constant force/heat coupling experiments, to solve problem force. The experimental results...

In the process of manufacturing and operation mechanical equipment, accurate measurement vector force provides an important basis for real-time control working conditions adjustment to ensure performance. Piezoelectric three-component unit can be used measure three-axis with characteristics high frequency stiffness, great dynamic response, resistance harsh conditions. dynamometer consisting four units six-axis force/torque, which is widely in measurement. However, because limitation...

In spaceflight, the orbit/attitude control rocket which mainly works in pulse ignition has important effect on spacecraft control. It is necessary to study performance of thrust vector generated by order improve precision and extend working life spacecraft. A piezoelectric measurement system for investigated both theoretically experimentally. The postulate proposed its expression obtained according 6-point-orientation principle. Piezoelectric quartz selected as sensitive component key...

Base on the great demand of defense and aerospace for measuring pulse thrust attitude/orbit rocket, dynamic measurement system has been developed. This paper is mainly about model acceleration compensation system. Through improving experimental modal analysis, theoretical was built. By comparing actual frequency response curve with model, it proves method practical accurate. According to step obtained by Laplace definite integral, so as performance. During studying capability measure thrust,...

The kinematical behavior of 5-axis machine tool introduced by toolpath calculation has a close relation with processing efficiency and quality parts. For the category sculptured surface parts abrupt curvature, such as turbine blade fixed guide vane, most commonly utilized spiral contouring modes usually encounter some trouble during actual machining, reason lies in difficult orientation control near edge However, global optimization for means increased computation burden, so it is time...

Purpose This paper aims to improve calibration and force measurement accuracy of multi-sensors’ piezoelectric dynamometer used in thrust rocket/air vehicle engine. Design/methodology/approach presents a mapping solution method sensors’ outputs based on the Kirchhoff thin plate theory, builds force-deformation differential equations with specific boundary conditions, uses finite difference (FD) solve analyzes offset loading forces four-sensor square layout main direction. The resultant...

Abstract It is important to improve the natural frequency of test device measurement accuracy. First-order basic dynamic model, which generally highest vibration energy frequency. Taking vector force (VFTD) as example, a novel design method for improving first-order by increasing structure stiffness proposed. In terms six degree-of-freedom (DOF) VFTD, model VFTD built through Lagrange equation obtain theoretical and mode shapes. Experimental obtained hammering compared with results prove...

Dynamic six-component force measurement is of great significance in the area aerodynamics. Although a large number previous experiments had been carried out to study static characteristics wind tunnel balance, these test methods are difficult apply dynamic measurement. In this article, new mechanical device developed simulate hatch open motion with loads, and then loads measured by novel piezoelectric balance. Owing nonlinearity, nonstationarity, internal coupling, an effective control...

To improve the accuracy of cutting force measurement and solve problem temperature interference in process, this paper proposes a new four-dimensional method that uses only y0-type quartz wafers. Firstly, put forward several arrangements wafers, establish output efficiency model different arrangement schemes. With goal maximum efficiency, determine optimal Subsequently, design two kinds TDTD shear-type piezoelectric sensors, obtain performance sensor through calibration experiments. The...

Background Force offset is an important movement and control parameter in rocket motor development process, its accurate measurement a vital guarantee of reliable operation, so there essential significance to achieve force calibration. Methods A novel nonlinear calibration method proposed based on deep belief network. Experimental platform established test completed. Because the Levenberg -Marquardt process has advantage both Newton gradient descent method, data are trained with -Marquardt,...

Piezoelectric dynamometers are out of use in high humidity. Experimental results showed that piezoelectric coefficients measured by the force-induced charges method initially fluctuated a small range and then was unstable, they could not be at relative humidity (RH). The traditional shielding method-insulation paste quiet convenient, it even added weight dynamometers. In this paper, novel strategy eliminates influence water adsorption with quartz surfaces on proposed. First, water-quartz...

The accurate measurement of surface friction resistance is crucial in the design hypersonic vehicles, given its significant impact on overall performance. To fulfill stringent requirements high sensitivity and to normal force interference during testing, present study introduces a novel approach for directly measuring micro force. This utilizes torque amplification principles based torsion characteristics quartz wafer. Firstly, detailed analysis conducted investigate relationship between...

Wind tunnel balance is one of the most important measurement instruments in aerodynamic field. In this paper, a new type piezoelectric wind developed to measure dynamic six-component force case hatch open motion device subsonic flow This mechanical mainly consists novel and rotary encoder. The assembled with four triaxial load cells as core device. According electric charges output which are proportional airloads, moment can be inversely calculated measuring model presented. characteristics...