Characteristic model based control of the X-34 reusable launch vehicle in its climbing phase

Abstract

In this paper, a characteristic model based longitudinal control design for the trans-aerosphere vehicle X-34 in its transonic and hypersonic climbing phase is proposed. The design is based on the dynamic characteristics of the vehicle and the curves it is to track in this climbing phase. Through a detailed analysis of the aerodynamics and vehicle dynamics during this climbing phase, an explicit description of the tracking curve for the flight path angle is derived. On the basis of this tracking curve, the tracking curves for the two short-period variables, the angle of attack and the pitch rate, are designed. An all-coefficient adaptive controller is then designed, based on the characteristic modeling, to cause these two short-period variables to follow their respective tracking curves. The proposed design does not require multiple working points, making the design procedure simple. Numerical simulation is performed to validate the performance of the controller. The simulation results indicate that the resulting control law ensures that the vehicle climbs up successfully under the restrictions on the pitch angle and overloading.trans-aerosphere vehicle X-34, climbing phase, characteristic modeling, adaptive control, robustness

Fuzzy dynamic characteristic model based attitude control of hypersonic vehicle in gliding phase

“…With the online data, we could use any recursive regression method to find the coefficients we need. Here a gradient descent algorithm is given below [6]:…”

“…They are u 0 (keep controller), u i (logical integration controller) and u d (logical differential controller). They are (see [6])…”

Stability and optimization of the golden-section adaptive control

“…Over the past twenty years, this control scheme has already been applied to more than 400 systems belonging to 10 kinds of engineering plants in the fields of astronautics (such as in the successful rendezvous and docking of Shenzhou-8 spacecraft [9]) and industry [2], [10] in China. In recent years, its potential in hypersonic vehicle control was revealed during both the cruising phase [11], [7] and the climbing phase [12].…”

Characteristic Model Based All-Coefficient Adaptive Control on Flexible Rotor Supported by Active Magnetic Bearings

“…The direct mapping means if the estimated parameters are not in the data set N 1 or N 2 , the parametersα 1 (k),α 2 (k) andβ 0 (k) will be assigned values that have the shortest distance between the boundary points of set N 1 or N 2 and estimated values, so the identification results will always remain in the set [31].…”

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