DS-11B

Function of the DS-11B angle sensor

The main function of DS-11B is to convert mechanical angular displacement into an electrical signal. The sensor operates in transformer mode: when AC excitation is applied to the excitation winding, output voltages are induced in the synchronization windings. Their amplitude and phase depend on rotor position. This allows the connected system to detect angular mismatch, gyro frame movement or precession angle and transmit the data to a control, indication or follow-up circuit.

Contactless construction of DS-11B

DS-11B is a contactless selsyn, so it has no brushes, slip rings or sliding electrical contacts. This design reduces wear, eliminates sparking at the current-collection point and improves stability in vibration conditions. The absence of friction elements is especially important in aircraft gyroscopic equipment, where additional mechanical resistance can affect measurement accuracy. The sensor is intended for continuous operation as part of onboard or ground-based control and measuring systems.

Operating principle of the DS-11B sensor

In the basic DS-11 winding scheme, the unit has a single-phase rotor excitation winding and three stator synchronization windings arranged 120 degrees apart and connected in a star circuit. Depending on the specific installation, the winding arrangement and connection scheme may vary. As the rotor turns relative to the stator, the inductive coupling between the windings changes. The resulting output EMF on the stator windings is proportional to the angular mismatch and is used by the receiving equipment to determine the measured angle.

DS-11B use on Mi-8 / Mi-171 systems

DS-11B is used in aircraft equipment where small angular movements must be measured with stable electrical transmission. The source context indicates use on Mi-8 / Mi-171 family helicopters, including gyroscopic systems and flight-navigation equipment. Typical application areas include gyro-verticals, attitude and heading systems, control aggregates, servo mechanisms and test equipment. Since actual installation depends on the specific avionics set and aircraft modification, compatibility should be checked against the relevant equipment documentation.

Ordering and replacement of DS-11B

When ordering DS-11B, the exact designation, modification and technical conditions should be confirmed. DS-11B belongs to the wider DS-11 series, which also includes DS-11A, DS-11V and DS-11G. These versions may differ by electrical data, mechanical execution or installation method. For supply or maintenance, the buyer should specify whether a product passport, verification certificate, storage records or wiring diagram is required. It is also useful to confirm the receiving unit, indicator or gyro system where the sensor will be installed.