Wnt signaling pathway and the Evo-Devo of deuterostome axis

Qian, Guanghui; Wang, Yiquan

doi:10.3724/sp.j.1005.2011.00684

Cited by 4 publications

(7 citation statements)

References 76 publications

(71 reference statements)

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“…Robustness is one of most important characteristics of a controller designed for high speed air-vehicles. It not only demands a controller to be stable in the situation of standard aerodynamic coefficients, but also the controller should have good performance if the real aerodynamic coefficients are largely different from the standard value (Gao and James, 1993;Polycarpou and Ioannou, 1996;Seung-Hwan et al, 2004;Tang and Ling, 2005;Elabbasy et al, 2006;Qian and Yanan, 2000;Tian-Bo, 2010). It really happens when an airvehicle is flying in bad air conditions or the weather is totally different from the designers assumed.…”

Section: Introductionmentioning

confidence: 99%

Research on the Robustness of an Adaptive PID Control of a Kind of Supersonic Missile

Jiao¹,

Jin²,

Wang³

2013

RJASET

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In this study, the dynamic characteristic of missile system is viewed as a two-loop system, such as inner loop and outer loop and we design an adaptive PID control strategy for the pitch channel linear model of supersonic missile. The robustness of a double PID controller is analyzed by changing the aerodynamic coefficients. The control law is testified to be stable even the aerodynamic coefficients are changed between 0.7 and 1.7 times of its standard value and the control effect is compared with the sliding mode control strategy. Also the advantage and defect of both control strategy are summarized at the end of this study.

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Section: Introductionmentioning

confidence: 99%

Research on the Robustness of an Adaptive PID Control of a Kind of Supersonic Missile

Jiao¹,

Jin²,

Wang³

2013

RJASET

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“…is the image function, and p is the parameter. Equation ( 3) is obtained from the Laplace transform property(Hua L. G. I,2009; Qian X. S.,2011) [16][17] :…”

mentioning

confidence: 99%

A Theoretical Counterexample of Solutions to Unsaturated Infiltration Equations

Zhu,

Chen

2024

Atlantis Highlights in Engineering

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A common method for obtaining the analytical solution of the unsaturated infiltration Richards equation under the first type of boundary condition is the Laplace transform. By linearizing the differential equation through the Laplace transform, solving it, and then applying the inverse transform, the result can be obtained. In this process, the traditional calculation scheme assumes that the original function converges, which is correct in most engineering cases, but theoretically, counterexamples may exist. This article presents a classic counterexample: when the unsaturated infiltration curve has a power-law form, the original integral diverges, resulting in the non-existence of the Laplace transform and the solution of the equation cannot represent the real infiltration situation. Based on this, this article suggests discussing the convergence of the original function before using the Laplace transform to solve the unsaturated infiltration equation to ensure that the results have mathematical significance. The content discussed in this article can be regarded as an improvement and supplement to the traditional unsaturated infiltration calculation scheme.

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“…The correlations between the hinge moment M h , the rudder deflection angle δ, and the angle of attack α are [19] …”

Section: Composition Of the Load Torquementioning

confidence: 99%

The Stiffness Calculation and Optimization for the Variable Stiffness Load Torque Simulation System

Yao

Zhou

2017

International Journal of Aerospace Engineering

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This paper presents a novel design for a variable stiffness load torque simulation system. The system is applied to the load torque on a rudder in a real-time hardware-in-the-loop system (HILS). Compared with the traditional loading method, in which unavoidable additional torque exists, the variable stiffness loading system employs a "first decomposed and then coupled" approach to output the load torque and to significantly reduce the additional torque. Based on experimental data obtained from a wind tunnel test, a calculation method is proposed to determine the loading parameters of the variable stiffness loading system. Since the load stiffness is related to a variety of factors, the stiffness values obtained from wind tunnel test data, such as the fixed Mach number and the rudder deflection angle, are not definite values. By analyzing the influencing factors of the loading parameters, an optimal set of load stiffness is obtained using an optimization algorithm, and exact tracking of the load torque is achieved. Using the calculation method to obtain a loading torque for the rudder as an example, the torque tracking error is less than 0.05 Nm. The simulation results indicate that the proposed calculation method for variable stiffness loading is effective.

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Wnt signaling pathway and the Evo-Devo of deuterostome axis

Cited by 4 publications

References 76 publications

Research on the Robustness of an Adaptive PID Control of a Kind of Supersonic Missile

Research on the Robustness of an Adaptive PID Control of a Kind of Supersonic Missile

A Theoretical Counterexample of Solutions to Unsaturated Infiltration Equations

The Stiffness Calculation and Optimization for the Variable Stiffness Load Torque Simulation System

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