The prime contractor for PGNCS and manufacturer of the inertial measurement unit (IMU) was the Delco Division of General Motors. PGNCS consisted of the following components: an inertial measurement unit (IMU) the Apollo Guidance Computer (AGC) resolvers to convert inertial platform angles to signals usable for servo control

An inertial measurement unit (IMU) is an electronic device that measures and reports a body's specific force, angular rate, and sometimes the orientation of the body, using a combination of accelerometers, gyroscopes, and sometimes magnetometers. When the magnetometer is included, IMUs are referred to as IMMUs.

The Apollo IMU is a genius device that measures a spacecraft's accelerations within a stable frame of reference provided by key ingredients: gyroscopes and accelerometers. The Sperry Corporation was responsible for building the gyros of the IMU.

CONSIDERATIONS OF APOLLO IMU GIMBAL LOCK. 1. Introduction. The Apollo inertial measurement unit provides specific force measurements within the guidance system as well as orientation signals to the control system and the pilot's attitude display.

The Apollo Inertial Measurement Unit (IMU) uses Inertial Reference Integrating Gyros (IRIGs – Xg, Yg, Zg) to detect changes in attitude and Pulse Integrating Pendulous Accelerometers (PIPAs – Xa, Ya, Za) to measure changes in velocity.

Unit (IMU) LM +X-AXIS OG AXIS Inertial Reference Integrating Gyros Unit (IMU) (IRIGs) X g, Y g, Z g – Stable platform for measurement of attitude and acceleration isolated from OUTER GIMBAL LM +Z-AXIS acceleration, isolated from MG AXIS case by three gimbals – Inertial Reference Integrating Gyros (IRIGs) sense attitude MIDDLE GIMBAL STABLE ...

Inertial Measurement Unit (IMU): The Solution. The key to managing the gimbal lock lies in the Inertial Measurement Unit (IMU). This device, crucial to the Apollo spacecraft, was designed to measure and report the velocity, orientation, and gravitational forces acting upon the spacecraft.

The IMU unit was a key part of the entire Apollo guidance, navigation and control system developed by the MIT Instrumentation Laboratory. The full three axis inertial guidance unit contains gyros and accelerometers.

The Inertial Measurement Unit (IMU) is the stable member for the ISS. It is a solid block of beryllium with holes bored into its structure to support gyros and accelerometers. The three inertial rate integrating gyros (IRIGs) measure the spacecrafts rotations and keep the IMU stable in respect to the current REFSMMAT.

The Inertial Measurement Unit (IMU) was the PGNCS’s way of sensing the spacecraft’s movement. Using gyroscopes and accelerometers, it could detect changes in the vehicle’s orientation and acceleration[1].