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The present wind detection model of weather UAV has limitations. In order to detect the wind speed of multi-flight states, the intelligent wind detection system of weather UAV based on the multi-mode variable structure was proposed in this paper. According to the change of acceleration and angular velocity, three detection equations were established. Based on flight motion states, the intelligent...
We consider the problem of controlling the yaw and lateral dynamics in heavy vehicles, consisting of combinations of a truck and multiple towed units. In such heavy vehicle configurations, undesired yaw rate and lateral acceleration amplifications, causing tail swings and lateral instabilities of the towed units, can be observed at high speed. In this paper, we present a predictive control approach...
A semi-active control heave compensation system is proposed, according to the requirements of 6000m deep sea poly-metallic mining system. The heave compensation system is acted upon by interacting of dynamic vibration absorber with accumulator. Magneto-rheological damper is act upon actuator to take semi-active control of heave compensation system. The composition and principle of the heave compensation...
The safety and comfort control of vehicles in certain cases is considered in this paper. We hope to use detectors plus advanced control methods to realize the satisfactory tracking control, even the proper velocity and acceleration control of vehicles. Because of the intrinsically nonlinear, highly plant uncertain of vehicles and closely interconnected among vehicles, here the method based on the...
Proportional-Integral-Derivative (PID) control is widely used to control mechanical systems. In PID control technique, however, there are limits to the accuracy of the resulting movement because of the influence of gravity, friction, and interaction of joints caused by modeling errors. Digital acceleration control has robustness for the modeling errors. But it requires position, velocity, and acceleration...
This paper proposes a new algorithm of generating command pulses for numerical controller. Different from the presently used NC pulse generating method, pulse train with automatically changed frequency following reference displacement commands can be generated using the proposed algorithm, and the generated command pulses can be modified in real time according to the reference signal. Moreover, by...
Characteristics of clutch engagement at different engagement stages were different, so different control methods were used in different stages. At quick engagement stage proportional control was used. Control system of starting acceleration stage was serious non-linear and it was difficult to establish precise mathematical model, so fuzzy control was adopted. At synchronization engagement stage clutch...
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