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A full-coefficient adaptive control method based on first-order characteristic model

A technology of adaptive control and characteristic model, applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve the problems of large dynamic changes, loss of parameter tracking and adaptive ability, etc.

Active Publication Date: 2016-01-27
BEIJING INST OF CONTROL ENG
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Problems solved by technology

In the process of in-depth research on a certain type of jumping re-entry lift control, it is found that due to the large dynamic changes of the controlled object, the model parameters sometimes touch or stay at the boundary, losing parameter tracking and self-adaptive capabilities, thus limiting the further improvement of re-entry guidance accuracy improve

Method used

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  • A full-coefficient adaptive control method based on first-order characteristic model
  • A full-coefficient adaptive control method based on first-order characteristic model
  • A full-coefficient adaptive control method based on first-order characteristic model

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Embodiment

[0053] Jump reentry lift control for reentry vehicles, according to figure 1 The block diagram shown designs a full-coefficient adaptive controller based on the first-order characteristic model, and the reference input is the nominal roll angle, u 2 is the lift feedback control quantity; the input is transformed into The output transforms to A takes a value of 36, and D(tcf) is a known dynamic gain function.

[0054] After multiple iterations of design and mathematical simulations, it was determined that α =0.3, λ 1 =1, λ 2 = 4, F θ1 =0.1, L=0.012, λ=1. The actual flight has achieved good results and achieved the expected goal. The parachute opening point error is 680m, and the control accuracy ranks at the international leading level.

[0055] Figure 3-6 The height curve, speed curve, axial apparent velocity increment curve and axial overload curve are given respectively. from Figure 3-6 It can be seen that the returner realizes a perfect jumping reentry, the in...

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Abstract

The invention discloses an all-coefficient adaptive control method based on a one-order characteristic model. The all-coefficient adaptive control method comprises the following steps: calculating a primary parameter estimation vector theta1(k) of a current cycle according to the formula which is as shown in the description; calculating an estimated parameter vector theta(k) according to the primary parameter estimation vector theta1(k) of the current cycle and an estimated parameter vector theta(k-1) of a previous cycle; carrying out feedback control according to estimated parameters alpha(k) and beta0(k) of the current cycle to obtain a control vector u(k) of the current cycle. The all-coefficient adaptive control method based on the one-order characteristic model is few in parameter, simple in algorithm, large and easily definable in parameter range, high in tracking speed of dynamic gain calculated by parameter estimation values and high in adaption capability.

Description

technical field [0001] The invention relates to the field of intelligent and adaptive control, in particular to a full-coefficient adaptive control method based on a first-order characteristic model. Background technique [0002] The existing full-coefficient adaptive control methods based on the characteristic model are all based on the characteristic model greater than or equal to the second order, such as 1998, "Acta Astronautics" (Vol.19, No.1, Jan., 1998, p8-12) Published "Manned Spacecraft Full Coefficient Adaptive Reentry Lift Control", in which a full coefficient adaptive control method based on impact point prediction using a second-order characteristic model was proposed. The second-order characteristic model requires upper and lower bounds for each model parameter, and upper and lower bounds for the sum of model parameters to ensure the stability of the closed-loop system. For the characteristic model greater than or equal to the second order, the upper and lower...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/04
Inventor 胡军吴宏鑫杨鸣张钊董文强杨俊春
Owner BEIJING INST OF CONTROL ENG
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