Single-gimbal control moment gyros (CMGs) have several advantages over other actuators for attitude control of spacecraft. For instance, they act as torque amplifiers and, thus, are suitable for slew maneuvers. However, their use as torque actuators is hindered by the presence of singularities, which, when encountered, do not allow a CMG cluster to generate torques about arbitrary directions. A...

For electro-optical imaging systems, line-of-sight stabilization against different disturbances created by mobile platforms is crucial property. The development of high resolution sensors and the demand in increased operating distances have recently increased the expectations from stabilization loops. For that reason, higher gains and larger bandwidths become necessary. As the stabilization loo...

The dynamics equations of a spacecraft consisting of two bodies mutually rotating around a common gimbal axis are derived by the use of the Newton–Euler approach. One of the bodies contains a cluster of single-gimbal variable-speed control moment gyros. The equations include all of the inertia terms and are written in a general form, valid for any cluster configurations and any number of actuat...

This paper proposes a new haptic device using a parallel mechanism with gimbal type actuators. This device has three legs actuated by 2-DOF gimbal mechanisms, which make the device simple and light by fixing all the actuators to the base. Three extra sensors are placed at passive joints to obtain a unique solution of the forward kinematics problem. The proposed haptic device is developed for an...

The Tactical Systems Division of Rockwell International is a supplier of infrared (IR) seeker based weapons systems. An important part of their activities is the design of missile seeker systems. During the conceptual design phase of these systems, an engineering concept team makes decisions which will ultimately affect the quality, cost, performance, availability and reliability of the weapon....

Traditionally, missile autopilots have been designed using linear control approaches with gain scheduling. Autopilot design is typically carried out in the frequency domain and the plant is linearized around various operating points on the trajectory. Moreover, three single axis autopilots are usually designed without considering the interaction among the motion axes, i.e., the autopilots in ea...

Menjadi videografer adalah hobi yang populer di masa pandemi ini karena berkreasi dalam bentuk video dan konten YouTube menjadi alternatif selain sekedar mengisi waktu luang atau menghasilkan uang. Untuk mendukung kamera diperlukan perangkat pendukung, hal seiring berjalannya mumpuni juga bisa didapatkan dari smartphone, teknologi tersebut harus diimbangi dengan kemampuan pengguna mengoperasika...

Sliding Sector Control (SSC) design method for nonlinear systems is proposed in such a way that the system trajectories are kept around sliding surface which surrounded by sector. The SSC derived so enforced to stay inside sector tracking requirements. State-Dependent Differential Riccati Equations (SDDRE) solved dynamical system. Within this context, having nonlinear(or state-dependent) surfac...