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On behalf of the Organizing Committee of the 3rd International Symposium on Systems and Control in Aeronautics and Astronautics in 2010 (ISSCAA 2010), I welcome all of you to Harbin, a city once called Paris in the Far East.
A new nonlinear optimal tracking control method is proposed and analyzed which stabilizes a class of unstable periodic orbits near collinear libration points. Since such libration point orbits are, in general, unstable, spacecraft moving on these orbits must use some form of trajectory control to remain close to their nominal paths. In this study, the control law based on optimal control theory gives...
The following topics are dealt with: spacecraft technology; control systems; signal processing; aeronautics technology; guidance and navigation; and computational intelligence.
The problem of optimal attitude tracking control for a rigid spacecraft is addressed by means of synergetic control technique. As a stepping-stone, we first design an invariant manifold and construct a variable structure control (VSC) scheme. Based on the invariant manifold, the synergetic optimal control (SOC) scheme is then proposed. The Modified Rodrigues Parameter (MRP) is adopted as attitude...
The computational complexity of multi-dimension assignment algorithm, which can be used to solve multi-sensor multi-target location and tracking problem based on time difference of arrival (TDOA) measurements, will increase exponentially with the scale of assignment problem. By the fact that multiple emitters usually exist separately in the surveillance space, the clustering technique is used to partition...
A terminal sliding mode controller is designed for a generic air-breathing hypersonic vehicles (AHVs). The model of AHVs is nonlinear, and includes uncertain parameters and intricate coupling between the engine and flight dynamics. An affine form of the longitudinal model is obtained by input/output linearization, and then a controller is designed by using terminal sliding mode method. The terminal...
This paper did research on fault-tolerant control of satellite control system. Based on general discussion over all available fault-tolerant control methods, we chose linear matrix inequation (LMI) to do research on robust fault-tolerant control. The result could apply to the control problem of three-axis stabilized directional satellite control system. Also, we use our result on fault diagnosis of...
The spotlight mode of spaceborne SAR platforms often have to point its payload to immobile target on the ground which means the satellite attitude have to follow a specific trajectory in a fixed time span. In this paper, the attitude angle, angular velocities and angular accelerate are derived. A PD control law with feedforward is developed to achieve the purpose. The approach is verified using numerical...
A guidance control method is proposed for the mission of autonomous rendezvous and docking with non-cooperative target spacecraft. Firstly, the relative motion equations of state are described in a line of sight coordinate frame. Then artificial potential function guidance based-fuzzy logic system, which adapts the parameters of the potential function, is used for chaser to approach non-cooperative...
The paper considers the reentry trajectory optimization of the hypersonic vehicle as an optimal control problem. The purpose is to design the optimal control law to ensure that the hypersonic vehicle maximizes the downrange under the heating rate, dynamic pressure and overload constraints. It is formulated as a constrained optimal control problem, where specific requirements of this reentry trajectory...
This article describes a new frequency synthesis approach to realize extremely accurate relative position determination for two spacecrafts with phase measurements at a variety of frequency separations. Both of the spacecrafts transmit one carrier wave phase modulated by two DOR sine tones at X-band, and one wave at S-band. These frequencies are set to resolve the cycle ambiguity of carrier wave at...
Propellant transfer control in microgravity is the key problems of on-orbit refueling. The paper proposes a simultaneously vented refueling technique to control the propellant transfer. Establishes numeric model to calculate the process of propellant filling, and that the results can satisfy the requirement of on-orbit refueling. When the propellant transfers into the tank, it is needs to control...
In this paper, we address the reference model adaptive neural network control problem for a class of switched nonlinear singular systems under the case of single input and multiple inputs. Based on RBF neural network, the state tracking controller and a switching strategy are designed so that switched nonlinear singular system can asymptotically track the desired reference model. It shows that RBF...
Fuzzy sliding mode controller based on trending law for electric actuator is proposed in this paper. The sliding mode is used to enhance the robustness of the system, the trending law is used to improve the system dynamic characteristics of reaching the sliding surface, and the fuzzy tuning schemes are employed to reduce the chattering problem around the sliding surface. The integral sliding mode...
The PID controller is one of the most popular controllers, due to its remarkable effectiveness, simplicity of implementation and broad applicability. However, the conventional approach for parameter optimization in PID controller is easy to produce surge and big overshoot, and therefore heuristics optimization methods such as genetic algorithm (GA), particle swarm optimization (PSO) are employed to...
SOA concept of service-oriented architecture and related technologies are described in this paper. With the current development of computer technology, a software and hardware architecture design of product data management system is given, and it bases on object-oriented technology and distributed database technology with service-oriented, furthermore it includes the security architecture and education...
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