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Space-based telescopes always have a deformable segmented primary mirror and a deformable MEMS mirror. Hierarchical control architecture is established for a space-based telescope with multiple wave-front correctors. The hierarchical control architecture organized the whole optical system as five levels, that is, object level, actuator level, local control level, local coordination level and top coordination level. Control strategies and methods are designed for each level controller. The simulation result of correcting wave-front error proves the control architecture and methods feasible.

An improved adaptive backstepping controller design method is proposed for a single input and single output nonlinear system with uncertainty and unknown parameter. The controller expression with undetermined parameters can be acquired by using adaptive backstepping design idea, and the controller parameters are optimized on using the adaptive particle swarm optimization (APSO). The backstepping controller can overcome the plant uncertainties and ensure the robust stability of system. The APSO is used to offset the disturbance and improve the tracking precision. Simulation experimental showed the method effectual.

The layout of the shape actuators in the Primary Mirror segments for a space-based telescope is a crucial factor of the adaptive control system scheme, which determines the correction capability to eliminate the face-shape error caused by the environmental temperature fields and so on. The layout design of the actuators is converted to an optimization problem solved by a Genetic Algorithm. The design result of the Genetic Algorithm is identical with the global search method, which validate the optimization method.

This paper proposed a new intelligent controller for a spin missile with uncertainty and unknown parameter. The spin missile controller expression with undetermined parameters can be acquired by using adaptive backstepping design idea, and the controller parameters are optimized online by using genetic algorithm. By using this new method proposed in this paper, not only the stability of the spin missile control system can be acquired more easily but also the dynamic behavior of the spin missile system is good. The simulation shows that the controller is valid.

This paper investigates the means to design a robust nonlinear controller for a class of nonlinear system with uncertainty and unknown parameter. A new design approach of optimization controller is proposed. The controller expression with undetermined parameters can be acquired by using adaptive backstepping and slide mode design idea, and the controller parameters are optimized on using genetic algorithm. By using controller proposed in this paper, not only the stability of the closed loop system can be acquired more easily but also the dynamic behavior of the system is well. Simulation results show that the controller is valid.

In this paper, a systematical method of designing a high gain and high speed gain-boosted operational transconductance amplifier (gain-boosted OTA) is introduced through mathematically modeling its small signal equivalent circuits in a simple and useful way. By applying root locus techniques to the conclusion of this model, two different ways of optimizing the performance of the gain-boosted OTA are proposed. To verifying the design methods, SMIC 0.18 mum CMOS technology and 1.8 V supply voltage are applied to implement this high gain and high speed OTA. The simulation results show that the output of the sample and hold amplifier (SHA) using these OTAs has minimized ring and overshoot, achieving SNR over 100 dB and SNDR over 70 dB with 39.9 MHZ sinusoid input, and at the higher frequency region, with input signal of 79.9 MHZ, the SNR over 81 dB and SNDR over 63 dB can be achieved.