A driving scheme using a pair of differential voltages (Vx, Vy) over a bias voltage is proposed to linearize the dc characteristic (angle versus voltage) of a two-axis MEMS scanner. The micromirror has a gimbal-less structure and is driven by vertical comb-drive actuators in conjunction with a leverage mechanism. At an optimal bias voltage of 53 V, a linear optical scan range of ±3.2◦ is achiev...

Feedback controllers for the stabilization of the angular velocity vector of a rigid spacecraft using a single-gimbal Variable Speed Control Moment Gyro (VSCMG) are presented. Linearization of the equations of motion show that complete attitude stabilization is not possible via linear methods. Nonetheless, it is shown that the linearized angular velocity equations are controllable, and a simple...

DEVICE DESIGN We present the design, fabrication, and demonstration of a fully decoupled 2D gimbal scanner with angular vertical comb (AVC) actuators. The device is realized by combining a foundry surface-micromachining process (MUMPs) with a 3-mask deep-reactive-ionetching (DRIE) post process. Surface-micromachining provides versatile mechanical design and electrical interconnect while bulk mi...

Kinematic analysis of the upper extremity has been conducted using a wide variety of techniques, philosophies, and analytic methods. We describe a simple, marker-based three-dimensional video analytic technique that borrows concepts from lower extremity kinematic analysis. A sequential rotation order about orthogonal axes is described, although alternate methods are examined as well. The method...

A signific~mt component of a user raodel in au infornration-seeking dialogue is tim task-related plazl motivating the information-seeker's queries. A number of researchers have Irmdeled the plan inference process and used these models to design more robust natural language interfaces. However in each case, it has been assumed that the system's context model and the plan under construction by th...

Gimbaled imaging systems require very high performance inertial stabilization loops to achieve clear image acquisition, precise pointing, and tracking performance. Therefore, higher bandwidths become essential meet recent increased demands. However, such often posses flexible dynamics around target bandwidth time delay of gyroscope sensors which put certain limit achievable bandwidths. For loop...

The paper presents the concept of controlling designed optoelectronic scanning and tracking seeker. above device is intended for so-called passive guidance short-range anti-aircraft missiles to various types air maneuvering targets. In presented control method, modified linear-quadratic regulator (LQR) estimation input signals using extended Kalman filter (EKF) were used. LQR regulation utilize...

this paper is based on a research carried out for evaluation of addict rehabilitation centers in iran. the research has been conducted by application of survey method, questionnaire technique and interview with help seekers (addicts) in qarchak varamin rehabilitation and de-addicion center in south- eastern of tehran. this study has been carried out in two stages of pre-treatment and rehabilita...

A laser-scanning rangefinder mounted on a gimbal with two degrees of freedom is presented. The can be used as part navigation system an unmanned aerial vehicle to avoid obstacles or prevent collisions. Compared stereo cameras, the device requires significantly less computing resources and dependent lighting conditions. integrated lidars, cost by order lower. А model was developed obstacle avoid...